Lincoln Electric NR-203MP, NR-232, NR-202, NR-211-MP, NR-203 Nickel (1%) Welding Instruction Manual

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INNERSHIELD

ELECTRODES

Welding Guide

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TABLE OF CONTENTS

SAFETY PRECAUTIONS ..........................3-11

INTRODUCTION...........................................12

PRODUCT ADVANTAGES.......................13-15

RECOMMENDED EQUIPMENT.......................15

WELDING PREPARATIONS........................16-17

Choose the Proper Innershield Gun............................16

Prepare the Work.........................................................17

Optimizing Feeding......................................................17

WELDING TECHNIQUES..............................18-24

Set the CTWD..............................................................18

Set the Wire Feed Speed (WFS).................................19

Start the Arc.................................................................19

Set the Voltage............................................................19

Travel Speed ...............................................................19

Loading 13-14 Lb. Coils on a 2” Spindle......................20

Handling Poor Fitup.....................................................21

Use the Proper Drag Angle..........................................21

Use the Proper Wire Angle to Joint .............................21

Making Vertical Up Welds ......................................22-23

Making Downhill and Vertical Down Welds .................23

Working with NS-3M....................................................24

OPERATING GUIDE.......................................25-29

Troubleshooting......................................................25-26

Effect of Operating Variables..................................26-27

Welder Qualification Test.............................................27

Storing Innershield Electrode .................................28-29

WELDING PROCEDURES...............................30-39

OPERA TING PROCEDURES..........................40-45

INNERSHIELD GUN P ARTS............................46-47

LINCOLN WELDING SCHOOL.......................48-49

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WARNING

The serviceability of a product or structure utilizing this type of information is and must be the sole responsibility of the builder/user. Many variables beyond the control of The Lincoln Electric Company affect the results obtained in applying this type of information. These variables include, but are not limited to, welding procedure, plate chemistry and temperature, weldment design, fabrication methods and service requirements.

CALIFORNIA PROPOSITION 65 WARNINGS

ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.

Read and understand the following safety highlights. For additional safety information, it is strongly recommended that you purchase a copy of “Safety in Welding & Cutting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box 351040, Miami, Florida 33135 or CSA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available from the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.

BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE PERFORMED ONLY BY QUALIFIED INDIVIDUALS.

Mar ‘95

Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm.

The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

The Above For Diesel Engines

The

Above For Gasoline

Engines

-SAFETY-

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FOR ENGINE powered equipment.

1.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running.

_____________________________________________

1.b. Operate engines in open, well-ventilated areas or vent the engine exhaust fumes outdoors.

1.c. Do not add the fuel near an open flame welding arc or when the engine is running. Stop the engine and allow it to cool before refueling to prevent spilled fuel from vaporizing on contact with hot engine parts and igniting. Do not spill fuel when filling tank. If fuel is spilled, wipe it up and do not start engine until fumes have been eliminated.

____________________________________________________

1.d. Keep all equipment safety guards, covers and devices in position and in good repair.Keep hands, hair, clothing and tools away from V-belts, gears, fans and all other moving parts when starting, operating or repairing equipment.

____________________________________________________

1.e. In some cases it may be necessary to remove safety

guards to perform required maintenance. Remove guards only when necessary and replace them when the maintenance requiring their removal is complete. Always use the greatest care when working near moving parts.

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1.f. Do not put your hands near the engine fan. Do not attempt to override the governor or idler by pushing on the throttle control rods while the engine is running.

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1.g. To prevent accidentally starting gasoline engines while turning the engine or welding generator during maintenance work, disconnect the spark plug wires, distributor cap or magneto wire as appropriate.

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1.h. To avoid scalding, do not remove the radiator pressure cap when the engine is hot.

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ELECTRIC AND MAGNETIC FIELDS may be dangerous

2.a. Electric current flowing through any conductor causes localized Electric and Magnetic Fields (EMF). Welding current creates EMF fields around welding cables and welding machines

2.b. EMF fields may interfere with some pacemakers, and welders having a pacemaker should consult their physician before welding.

2.c. Exposure to EMF fields in welding may have other health effects which are now not known.

2.d. All welders should use the following procedures in order to minimize exposure to EMF fields from the welding circuit:

2.d.1.

Route the electrode and work cables together - Secure them with tape when possible.

2.d.2. Never coil the electrode lead around your body.

2.d.3. Do not place your body between the electrode and

work cables. If the electrode cable is on your right side, the work cable should also be on your right side.

2.d.4. Connect the work cable to the workpiece as close as

possible to the area being welded.

2.d.5. Do not work next to welding power source.

ELECTRIC SHOCK can kill.

3.a. The electrode and work (or ground) circuits are electrically “hot” when the welder is on. Do not touch these “hot” parts with your bare skin or wet clothing. Wear dry, hole-free gloves to insulate hands.

3.b. Insulate yourself from work and ground using dry insulation. Make certain the insulation is large enough to cover your full area of physical contact with work and ground.

In addition to the normal safety precautions, if welding must be performed under electrically hazardous conditions (in damp locations or while wearing wet clothing; on metal structures such as floors, gratings or scaffolds; when in cramped positions such as sitting,

(Cont’d on page 5)

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ELECTRIC SHOCK can kill. (Cont’d)

kneeling or lying, if there is a high risk of unavoidable or accidental contact with the workpiece or ground) use the following equipment:

• Semiautomatic DC Constant Voltage (Wire) Welder.

• DC Manual (Stick) Welder.

• AC Welder with Reduced Voltage Control.

3.c. In semiautomatic or automatic wire welding, the electrode, electrode reel, welding head, nozzle or semiautomatic welding gun are also electrically “hot”.

3.d. Always be sure the work cable makes a good electrical connection with the metal being welded. The connection should be as close as possible to the area being welded.

3.e. Ground the work or metal to be welded to a good electrical (earth) ground.

3.f.

Maintain the electrode holder, work clamp, welding cable and welding machine in good, safe operating condition. Replace damaged insulation.

3.g. Never dip the electrode in water for cooling.

3.h. Never simultaneously touch electrically “hot” parts of electrode holders connected to two welders because voltage between the two can be the total of the open circuit voltage of both welders.

3.i. When working above floor level, use a safety belt to protect yourself from a fall should you get a shock.

3.j. Also see Items 6.c. and 8.

ARC RAYS can burn.

4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks and the rays of the arc when welding or observing open arc welding. Headshield and filter lens should conform to ANSI Z87. I standards.

4.b. Use suitable clothing made from durable flame-resistant material to protect your skin and that of your helpers from the arc rays.

4.c. Protect other nearby personnel with suitable, non-flammable screening and/or warn them not to watch the arc nor expose themselves to the arc rays or to hot spatter or metal.

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FUMES AND GASES can be dangerous.

5.a.Welding may produce fumes and gases hazardous to health. Avoid breathing these fumes and gases.When welding, keep your head out of the fume. Use enough ventilation and/or exhaust at the arc to keep

fumes and gases away from the breathing zone. When

welding with electrodes which require special ventilation such as stainless or hard facing (see instructions on container or MSDS) or on lead or cadmium plated steel and other metals or coatings which produce highly toxic fumes, keep exposure as low as possible and below Threshold Limit Values (TLV) using local exhaust or mechanical ventilation. In confined spaces or in some circumstances, outdoors, a respirator may be required. Additional precautions are also required when welding on galvanized steel.

5.b.

Do not weld in locations near chlorinated hydrocarbon

vapors coming from degreasing, cleaning or spraying operations. The heat and rays of the arc can react with solvent vapors

to form phosgene, a highly toxic gas, and other irritating products.

5.c. Shielding gases used for arc welding can displace air and cause injury or death. Always use enough ventilation, especially in confined areas, to insure breathing air is safe.

5.d. Read and understand the manufacturer’s instructions for this

equipment and the consumables to be used, including the material safety data sheet (MSDS) and follow your employer’s safety practices. MSDS forms are available from your welding distributor or from the manufacturer.

5.e. Also see item 1.b.

WELDING SPARKS can cause fire or explosion.

6.a.

Remove fire hazards from the welding area.

If this is not possible, cover them to prevent

the welding sparks from starting a fire.

Remember that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas. Avoid welding near hydraulic lines. Have a fire extinguisher readily available.

6.b. Where compressed gases are to be used at the job site, special precautions should be used to prevent hazardous situations. Refer to “Safety in Welding and Cutting” (ANSI Standard Z49.1) and the operating information for the equipment being used.

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WELDING SPARKS can cause fire or explosion.

(Cont’d)

6.c. When not welding, make certain no part of the electrode circuit is touching the work or ground. Accidental contact can cause overheating and create a fire hazard.

6.d. Do not heat, cut or weld tanks, drums or containers until the proper steps have been taken to insure that such procedures will not cause flammable or toxic vapors from substances inside. They can cause an explosion even

though

they have been “cleaned”. For information, purchase “Recommended Safe Practices for the

Preparation

for Welding and Cutting of Containers and Piping That Have Held Hazardous Substances”, AWS F4.1 from the American Welding Society

(see address above).

6.e. Vent hollow castings or containers before heating, cutting or welding. They may explode.

6.f.

Sparks and spatter are thrown from the welding arc. Wear oil free protective garments such as leather gloves, heavy shirt, cuffless trousers, high shoes and a cap over your hair. Wear ear plugs when welding out of position or in confined places. Always wear safety glasses with side shields when in a welding area.

6.g. Connect the work cable to the work as close to the welding area as practical. Work cables connected to the building framework or other locations away from the welding area increase the possibility of the welding current passing through lifting chains, crane cables or other alternate circuits. This can create fire hazards or overheat lifting chains or cables until they fail.

6.h. Also see item 1.c.

CYLINDER may explode if damaged.

7.a. Use only compressed gas cylinders containing the correct shielding gas for the process used and properly operating regulators designed for the gas and

pressure used. All hoses, fittings, etc. should be suitable for the application and maintained in good condition.

7.b. Always keep cylinders in an upright position securely chained to an undercarriage or fixed support.

7.c. Cylinders should be located:

•Away from areas where they may be struck or subjected to

physical damage.

• A safe distance from arc welding or cutting operations and

any other source of heat, sparks, or flame.

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CYLINDER may explode if damaged. (Cont’d)

7.d. Never allow the electrode, electrode holder or any other electrically “hot” parts to touch a cylinder.

7.e. Keep your head and face away from the cylinder valve outlet when opening the cylinder valve.

7.f. Valve protection caps should always be in place and hand tight except when the cylinder is in use or connected for use.

7.g. Read and follow the instructions on compressed gas cylinders, associated equipment, and CGA publication P-l, “Precautions for Safe Handling of Compressed Gases in Cylinders,” available from the Compressed Gas Association 1235 Jefferson Davis Highway, Arlington, VA 22202.

FOR ELECTRICALLY powered equipment.

8.a. Turn off input power using the disconnect switch at the fuse box before working on the equipment.

8.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes and the manufacturer’s recommendations.

8.c. Ground the equipment in accordance with the U.S. National Electrical Code and the manufacturer’s recommendations.

PRÉCAUTIONS DE SÛRETÉ

Pour

votre propre protection lire et observer toutes les instructions et les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suivantes:

Sûreté Pour Soudage A L’Arc

1. Protegez-vous contre la secousse électrique:

a. Les circuits à l’électrode et à la piéce sont sous tension

quand la machine à souder est en marche. Eviter toujours tout contact entre les parties sous tension et la peau nue ou les vétements mouillés. Porter des gants secs et sans trous pour isoler les mains.

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b. Faire trés attention de bien s’isoler de la masse quand on

soude dans des endroits humides, ou sur un plancher metallique ou des grilles metalliques, principalement dans les positions assis ou couché pour lesquelles une grande partie du corps peut être en contact avec la masse.

c. Maintenir le porte-électrode, la pince de masse, le câble de

soudage et la machine à souder en bon et sûr état defonctionnement.

d. Ne jamais plonger le porte-électrode dans l’eau pour le

refroidir.

e. Ne jamais toucher simultanément les parties sous tension

des porte-électrodes connectés à deux machines à souder parce que la tension entre les deux pinces peut être le total de la tension à vide des deux machines.

f. Si on utilise la machine à souder comme une source de

courant pour soudage semi-automatique, ces precautions pour le porte-électrode s’applicuent aussi au pistolet de soudage.

2. Dans le cas de travail au dessus du niveau du sol, se protéger contre les chutes dans le cas ou on recoit un choc. Ne jamais enrouler le câble-électrode autour de n’importe quelle partie du corps.

3. Un coup d’arc peut être plus sévère qu’un coup de soliel, donc:

a. Utiliser un bon masque avec un verre filtrant approprié ainsi

qu’un verre blanc afin de se protéger les yeux du rayonnement de l’arc et des projections quand on soude ou quand on regarde l’arc.

b. Porter des vêtements convenables afin de protéger la peau

de soudeur et des aides contre le rayonnement de l‘arc.

c. Protéger l’autre personnel travaillant à proximité au soudage

à l’aide d’écrans appropriés et non-inflammables.

4. Des gouttes de laitier en fusion sont émises de l’arc de soudage. Se protéger avec des vêtements de protection libres de l’huile, tels que les gants en cuir, chemise épaisse, pantalons sans revers, et chaussures montantes.

5. Toujours porter des lunettes de sécurité dans la zone de soudage. Utiliser des lunettes avec écrans lateraux dans les zones où l’on pique le laitier.

6. Eloigner les matériaux inflammables ou les recouvrir afin de prévenir tout risque d’incendie dû aux étincelles.

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7. Quand on ne soud

e pas, poser la pince à une endroit isolé de la masse. Un court-circuit accidental peut provoquer un échauffement et un risque d’incendie.

8. S’assurer que la masse est connectée le plus prés possible de la zone de travail qu’il est pratique de le faire. Si on place la masse sur la charpente de la construction ou d’autres endroits éloignés de la zone de travail, on augmente le risque de voir passer le courant de soudage par les chaines de levage, câbles de grue, ou autres circuits. Cela peut provoquer des risques d’incendie ou d’echauffement des chaines et des câbles jusqu’à ce qu’ils se rompent.

9. Assurer une ventilation suffisante dans la zone de soudage. Ceci est particuliérement important pour le soudage de tôles galvanisées plombées, ou cadmiées ou tout autre métal qui produit des fumeés toxiques.

10. Ne pas souder en présence de vapeurs de chlore provenant d’opérations de dégraissage, nettoyage ou pistolage. La chaleur ou les rayons de l’arc peuvent réagir avec les vapeurs du solvant pour produire du phosgéne (gas fortement toxique) ou autres produits irritants.

11. Pour obtenir de plus amples renseignements sur la sûreté, voir le code “Code for safety in welding and cutting” CSA Standard W 117.2-1974.

PRÉCAUTIONS DE SÛRETÉ POUR LES MACHINES À SOUDER À TRANSFORMATEUR ET À REDRESSEUR

1. Relier à la terre le chassis du poste conformement au code de l’électricité et aux recommendations du fabricant. Le dispositif de montage ou la piece à souder doit être branché à une bonne mise à la terre.

2. Autant que possible, I’installation et l’entretien du poste seront effectués par un électricien qualifié.

3. Avant de faires des travaux à l’interieur de poste, la debrancher à l’interrupteur à la boite de fusibles.

4. Garder tous les couvercles et dispositifs de sûreté à leur place.

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INNERSHIELD®

Innershield is an arc welding process that uses a continuously fed wire to supply filler metal to the arc. The wire is not solid, but is tubular. Agents necessary to shield the arc from the surrounding atmosphere are placed inside the tube. No additional shielding is required. Innershield was originally used as a replacement for stick welding. Innershield can provide higher productivity and enhance quality when compared to stick welding. It offers increased arc-on time due to the continuous nature of the process. There are also fewer starts and stops, which are frequent sources for defects.

Although the Innershield process has been displaced in many areas by gas-shielded processes, Innershield continues to be an important process for steel fabrication in many markets. Innershield is the primary means for structural steel building erection in the United States. In any shop or shipyard where wind is a problem, Innershield can be a viable solution. Pipeline fabrication is often done with Innershield because it is done outdoors and shielding gas is sometimes difficult to get to these locations.

Lincoln Electric, the originator of the Innershield process, makes Innershield wire in a proprietary manner. The manufacturing processes that Lincoln Electric uses has specific benefits that you can see in every pound of wire you use. The Innershield wires Lincoln Electric produces are very stiff and have excellent column strength. This allows for excellent feedability. Lincoln Electric also fills the wire in a proprietary manner. This step ensures that you get the right amount of fill in every inch of wire. Lincoln Electric is the worldwide leader in Innershield. You can see that when you use our products, meet with our sales reps, or call the factory for support.

INTRODUCTION

Current carrying contact tip

Arc

Molten slag

Solidified slag

Solidified

eld

metal

Molten

weld metal

Insulated Guide

Wire core consists of powdered metal, vapor (or gas) forming materials, deoxidizers and scavengers.

Arc shield composed of vaporized and slag forming compounds protects metal transferring through arc.

Metal droplets covered with a thin slag coating, forming molten puddle.

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INNERSHIELD FEATURES

• Can be used in wind speeds of up to 30 mph without losing mechanical properties.

• Gas bottles are unnecessary.

• Stiff wire with high column strength.

BENEFITS OVER GAS-SHIELDED PROCESSES

• Innershield does not require gas shielding.

• No external shielding eliminates gas cost.

• No shielding gas means no cylinder handling, changeout, and rental saving time and money.

• No shielding gas means simpler guns and feeders for lower maintenance costs.

• No shielding gas means no tenting to keep wind away saving labor costs.

• Innershield Wires are stiff.

• Stiff wire is excellent for feedability.

• Stiff wire allows for longer guns to be used, saving labor.

costs moving feeders and welders.

• Stiff wire allows the welder to break off the wire without

clippers.

BENEFITS OVER STICK WELDING

• Innershield is a continuous process.

• This means less starts and stops, saving money and increasing quality.

• This allows the welder to spend more time welding, not changing rods, decreasing labor costs.

• Innershield has higher deposition efficiency.

• Innershield does not produce “stubs” like the stick process. Stubs are materials you purchase and then throw away.

PRODUCT ADVANTAGES

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SEISMIC APPLICATIONS:

Constant voltage (CV) power sources are recommended for use with all Innershield electrodes.

NR-211-MP THICKNESS RESTRICTIONS:

Wire Diameter Max. Plate Thickness

.035”, .045” (0.9, 1.2mm) 5/16” (7.9mm) .068”, 5/64”, 3/32” 1/2” (12.7mm) (1.7, 2.0, 2.4mm)

NR-212 is designed to be used on plate up to 3/4” (19.1mm) thick.

SINGLE PASS LIMITATIONS

Certain FCAW-S electrodes are limited to single pass applications. These include, but are not limited to NR-1, NR-5, NR-131 and NR-152.

APPLICATION INFORMATION

SEISMIC STRUCTURAL WELDING APPLICATIONS

The electrodes below have been tested in accordance with FEMA 353 - Recommended Specifications and Quality Assurance

Guidelines for Steel Moment-Frame Construction for Seismic Applications. FEMA 353 test certificates are available upon

request. These certificates contain mechanical test results at low and high heat input levels and diffusible hydrogen classifications. The electrodes indicated with a * also have electrode exposure time on the certificate.

Electrode Diameters

NR-203-MP .068”, 5/64" NR-203 Nickel (1%) 5/64", 3/32” NR-232* .068", .072", 5/64" NR-305* 3/32" NR-311Ni 5/64”, 3/32”, 7/64"

ELECTRODE EXPOSURE

FEMA 353 and other specifications which limit electrode exposure may require monitoring electrode exposure time and/or conditions after removal from a sealed package.

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PRODUCT LIMITATIONS

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INTERMIXING

When Innershield (FCAW-S) weld deposits are intermixed with weld deposits from other welding processes, a decrease in weld metal Charpy V-notch (CVN) toughness properties may occur. For applications requiring CVN properties, intermix testing with the specific electrodes is recommended to ensure the intermixed weld metal meets the required CVN requirements.

TACK WELDING

The following electrodes are recommended for tack welding prior to Innershield welding:

• All Innershield (FCAW-S) wires

• SMAW: Fleetweld 35LS, Jetweld LH70, Jetweld 2, Excalibur 7018

• GMAW solid electrodes

AGING:

The AWS filler metal specification for these products (A5.20 & A5.29) permit aging of test specimens. When conducting welding procedure or operator qualification tests, it is recommended that aging be applied, whenever permitted by the appropriate code. For example, when qualifying procedures to AWS D1.1 Structural Welding Code, see Paragraph 5.10.4.

Preheat and interpass temperature control are recommended for optimum mechanical properties, crack resistance and hardness control. This is particularly important on multiple pass welds and heavier plate. Job conditions, prevailing codes, high restraint, alloy level and other considerations may also require preheat and interpass temperature control.

ARC GOUGING

When Arc Gouging Innershield welds, black smudges or spots may appear on the surface of the groove. The condition is aggravated when the carbon is allowed to touch the surface. This black residue does not indicate the presence of porosity or poor weld quality. It can be easily removed by wire brushing or light grinding.

PRODUCT LIMITATIONS

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CHOOSE THE PROPER INNERSHIELD GUN

Lincoln Innershield Guns

Rated Amperage, Duty Cycle and Wire Sizes

For proper CTWD use the appropriate insulated guide. For

specific information on wire size and cable length, please see

your local Lincoln representative.

K126-1, -2 Gun with 62° Nozzle

350 Amps at 60% Duty Cycle Wire Size: .062–3/32”(1.6-2.4mm)

K206 Gun

350 Amps at 60% Duty Cycle Wire Size: .062–3/32"(1.6-2.4mm)

K116 -2 Gun

600 Amps at 60% Duty Cycle Wire Size .120–7/64”(3.0-2.8mm)

K361-10 Gun

350 Amps at

60% Duty Cycle Wire Size .068–5/64”(1.7-2.0mm)

K289-1, -4

500 Amps at 60% Duty Cycle Wire Size: .120–7/64"(3.0-5.6mm)

K309 Gun

250 Amps at 60% Duty Cycle Wire Size:.062–3/32"(1.6-2.4mm)

K115-1, -2, -3, -4, -5 Guns with 82° Nozzle

450 Amps at 60% Duty Cycle Wire Size: .068–.120”(1.7-3.0mm)

K115-8, -10 Guns with 45° Nozzle

450 Amps at 60% Duty Cycle Wire Size: .068–.120”(1.7-3.0mm)

K264-8 Gun with 30° Long Tube for LN-23P

250 Amps at 60% Duty Cycle Wire Size: .068–5/64”(1.7-2.0mm)

K345 -10 Gun with 90° Standard Tube for LN-23P

350 Amps at 60% Duty Cycle Wire Size: .068–5/64”(1.7-2.0mm)

K355-10 Gun with 90° Tube for LN-23P

250 Amps at 60% Duty Cycle Wire Size: .068–5/64”(1.7-2.0mm)

Fume Extraction Guns

LN-23P Guns

Innershield Guns

Fume Extraction Gun

INNERSHIELD GUNS

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Current Amps Total Work and Electrode Cable Length

(1)

60% Duty Cycle

0-50 ft. (0-15m) 50-100 ft. (15-30m)

300 1 (50mm2) 1 (50mm2)

400 2/0 (70mm2) 2/0 (70mm2)

500 2/0 (70mm2) 2/0 (70mm2)

600 3/0 (95mm2) 3/0 (95mm2)

(1)

mm2 equivalent according to IEC (International Electrical Code).

PREPARE THE WORK

Clean the joint by removing excessive scale, rust, moisture, paint, oil and grease from the surface. As with all welding applications, joint cleanliness is necessary to avoid porosity and to attain the travel speeds indicated in the procedures.

Tack weld with Innershield wire or Fleetweld® 35LS, Jetweld® LH-70 or Jetweld 2 manual stick electrodes. If other electrodes are used, Innershield slag removal may be difficult in the area of the tacks.

The work connection can be placed either at the beginning or at the end of the weld, depending upon the application. If necessary, try different locations until the best weld quality is obtained.

Clamp the work cable to the work so there is a positive and clean metal-to-metal contact point. Poor work connections raise system voltage losses and can result in convex or ropey beads typical of low voltage, even if the machine meters indicate proper voltage.

Never use undersize or badly worn work cables. Choose the cable size per the following table:

WELDING PREPARATIONS

OPTIMIZING FEEDING

Most feeding problems are caused by improper handling of the gun cable or wire.

1. Do not kink or pull the cable around sharp corners. Keep the gun cable as straight as possible when welding.

2. Do not allow two-wheelers, fork lift trucks, etc. to run over the cables.

3. Keep the cable clean per instructions in the wire feeder operating manual.

4. Innershield wire has proper surface lubrication on it. Use only clean, rust-free wire.

5. Replace the nozzle contact tip when it becomes worn or the end appears fused or deformed.

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SET THE CONTACT TIP TO WORK DISTANCE (CTWD)

CTWD is measured from the end of the contact tip to the work.

Maintain this length within ±1/8” (3.2mm.) for CTWD ≤1” (25 mm)

or within ±1/4” (6.4 mm) for CTWD >1” (25 mm) during welding.

To obtain the proper CTWD when using an insulated guide:

1. Remove the insulated guide from the end of the gun tube.

2. Inch the wire out beyond the end of the contact tip until you obtain the CTWD specified for each size and type electrode.

3. Replace insulated guide.

4. The length of wire protruding from the end of the guide is visible stickout. Maintaining this visible CTWD with the guide in place gives the correct CTWD while welding. For wires using the T12313 Thread Protector, the contact tip is exposed.

This tip should NEVER be allowed to touch the work when the power source output contactor is closed, as it is electrically “hot”.

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WARNING: When inching, the wire is always electrically “hot” to ground, except on wire feeders with a “cold inch” feature.

Arc

Work

Wire Electrode

Visible CTWD

Insulated Guide

Contact Tip

Gun Tube (Nozzle)

Contact Tip to Work Distance

(CTWD)

WELDING TECHNIQUES

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SET THE WIRE FEED SPEED

Adjust the wire feed speed using the WFS control on the wire feeder. Set to the suggested procedures. See pages 30-39. The approximate amperage corresponding to each WFS at the specified CTWD is also listed in the table. Amperage depends on wire feed speed and CTWD. If the CTWD is shortened, amperage will increase. If a wire feed speed meter is not available it may be measured by running the wire out for 6 seconds, then measure the length of wire fed and multiply by 10 to get the WFS in inches per minute (in/min).

START THE ARC

With the proper visible CTWD set, position the gun with the wire lightly touching the work. Avoid pushing the wire into the joint before starting the arc. Press the gun trigger to start the weld. Release the trigger and pull the gun from the work to stop the arc.

Some welders accustomed to manual welding with stick electrode tend to push the wire into the joint as it burns away. Since the wire is mechanically fed, this must be avoided.

SET THE VOLTAGE

Adjust the voltage to the suggested procedures as measured by the wire feeder voltmeter or voltmeter placed between the wire feeder contact block and workpiece. See pages 30-39. The presence of surface porosity indicates that the arc voltage is too high and should be lowered. An excessively convex or ropey bead indicates that the voltage is too low. Increase the voltage setting to reduce the convexity or ropey appearance of the bead. Also, check for poor work cable connections, undersized or damaged work cables, and poor cable clamps.

TRAVEL SPEED

As in all welding processes, use a travel speed which keeps the arc at the front edge of the weld puddle and produces the desired weld size. Maintain a uniform travel speed. The best way to do this is to maintain a uniform distance between the wire and the molten slag behind the wire. Travel speed is usually faster with Innershield wire than with stick electrodes because of the higher deposit rate. Many welders tend to move too slowly when they first weld with Innershield wire.

WELDING TECHNIQUES

Page 20

– 20 –

WELDING TECHNIQUES

LOADING 13-14 LB. (5.9-6.5 kg) COILS ON A 2” (50mm) SPINDLE

1. Remove the locking collar and the cover plate from K435 spindle adapter.

3. Unpack the 14 lb. (6.4kg) coil of wire. Be sure not to bend the side tabs of the coil liner. Straighten any tabs that may have been bent.

4. Remove the start end of the coil, cut off the bent end, straighten the first six inches. Be sure the cut end of the wire is round and burr free before the new coil into the drive rolls. Thread it through the feeding wire feed liner until about four inches of wire is exposed.

5. Replace the front reel cover and center clamping collar. To prevent the wire from dereeling, keep the reel from turning and tighten the clamping collar securely.

6. See wire feeder operating manual for instructions on loading the wire into the drive roll and guide tubes.

Page 21

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HANDLING POOR FITUP

Innershield bridges gaps better than most welding processes. When using NS-3M at 3” (76mm) CTWD, temporarily increasing the visible CTWD to as much as 3-1/4” (83mm) helps reduce penetration and burnthrough to bridge gaps. Poor fitup may require a small, temporary increase in visible CTWD or a reduction in WFS setting.

USE A DRAG TECHNIQUE

Tilt the gun back away from the weld puddle in the direction of travel about the same as required in stick electrode welding. If slag tends to run ahead of the arc, increase the drag angle. However, if the drag angle becomes too great, erratic arc action and excessive arc blow will result in porosity and poor bead shape.

USE THE PROPER WIRE ANGLE TO JOINT

Horizontal Fillets

For 1/4” (6mm) and smaller fillets, point the wire at the joint. The wire angle to the joint should be about 40°.

For best bead shape on 5/16” (8mm) and large horizontal fillets, point the wire at the bottom plate close to the corner of the joint. The angle between the wire and the bottom plate should be less than 45°. Using this position, the molten metal washes onto the vertical plate.

40˚

WELDING TECHNIQUES

DRAG ANGLE

TRAVEL

40ß

Page 22

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MAKING VERTICAL UP WELDS

Use 5/64” (2.0mm) size and less.

NR-202 NR-203M NR-203MP NR-203 Nickel (1%) NR-211-MP NR-212 NR-232 NR-233

Smaller sizes, 5/64" and less are recommended for all position welding.

When welding out-of-position, don’t whip, break the arc, move out of the puddle or move too fast in any direction. Use WFS in the low portion of the range. General techniques are illustrated below. Experience will show how much hesitation and upward step is required for high quality welds.

Generally, keep the wire nearly perpendicular to the joint as illustrated. The maximum angle above perpendicular may be required if porosity becomes a problem.

Groove Welds

1. Make a distinct hesitation at the outer edges of bevel.

2. Minimize each upward step. Do not step up at the edges. Come straight out from the hesitation point and move up across the weld.

WELDING TECHNIQUES

Max. 20°

Page 23

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Vertical Up Fillet and Lap Welds

1. Make larger welds with the following techniques: a. On 1/4” (6mm) welds, a short side-to-side motion is

usually sufficient.

b. On larger welds, use a triangular weave (see number

1 in the sketch below) with a distinct hesitation at the outer edges for the first pass.

c. Use a side-to-side weave (see number 2 in the sketch

below) similar to that used for butt welds on the second and later passes. The first pass should have a face width of 5/16” - 3/8” (8 - 10mm) before starting this weave.

MAKING DOWNHILL AND VERTICAL DOWN WELDS

With NR-202, NR-203 (types), NR-207, NR-208-H, NR-211-MP, NR-212

Make 1/4” (6mm) or smaller welds using vertical down techniques. The excellent high speed welding characteristics are best utilized for low cost single pass welds by positioning the work downhill or vertical down. About a 60° downhill angle with 5/64” or 3/32” (2.0 or 2.4mm) electrode usually provides maximum speed.

Use stringer beads and currents in the middle to high portion of the range. Tip the electrode up so that arc force helps hold the molten metal in the joint. Move as fast as possible consistent with desired bead shape.

WELDING TECHNIQUES

10-15°

Page 24

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WORKING WITH NS-3M

To calculate electrical stickout, subtract 1/4” from CTWD.

.120" (3.0mm) NS-3M

When using the long CTWD of 3” to 4” (75 to 100mm), the long length of wire beyond the contact tip has greater electrical resistance. Because of the greater resistance, the wire is heated to a higher temperature so it melts more rapidly in the arc to increase deposition rates and lower weld cost.

Using a long CTWD reduces penetration and makes starts more difficult. The long distance from the contact tip to the work also allows the wire to wander more than if a shorter CTWD is used.

Linc-Fill welding with 4” (100mm) CTWD is generally limited to 9/16” (8mm) (leg) and larger flat fillets, multiple pass flat fillets and the fill passes of flat deep groove butt joints.

When changing the insulated guide tips to increase CTWD from 3” to 4” (75 to 100mm), the meter voltage reading must be increased by 2 or 3 volts to maintain a good flat bead. The current (or WFS) control setting must also be adjusted to increase the wire feed speed to obtain the same welding current.

For welding with 4” (100mm) CTWD, follow the basic instructions under “Start The Arc”, on page 19. Start with 3/4” (19mm) visible CTWD. When the arc is established, increase the CTWD to the normal 1-5/8” (41mm) visible CTWD using the proper insulated guide. See the tables on pages 30-39 for the proper CTWD for each size wire.

WELDING TECHNIQUES

Page 25

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Well made Innershield welds have excellent appearance.

TROUBLESHOOTING

To Eliminate Porosity (In order of importance)

1. Clean the joint from moisture, rust, oil, paint and

other contaminants

2. Decrease voltage

3. Increase CTWD

4. Increase WFS

5. Decrease drag angle

6. Decrease travel speed

To Eliminate a Ropey Convex Bead (In order of importance)

1. Increase voltage (within wire specifications)

2. Decrease CTWD

3. Decrease WFS

4. Decrease travel speed

5. Decrease drag angle

To Reduce Spatter (In order of importance)

1. Adjust voltage

2. Decrease drag angle

3. Decrease CTWD

4. Increase WFS

5. Decrease travel speed

To Correct Poor Penetration (In order of importance)

1. Decrease CTWD 4. Decrease travel speed

2. Increase WFS 5. Decrease drag angle

3. Decrease voltage

OPERATING GUIDE

Page 26

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To Minimize Arc Blow (In order of importance) Arc blow occurs when thr arc stream does not folow the shortest path between the electrode and the workpiece.

1. Move work connection locations

2. Decrease drag angle

3. Increase CTWD

4. Decrease WFS and voltage

5. Decrease travel speed

To Eliminate Stubbing (In order of importance) Stubbing occurs when the wire drives through the molten puddle and hits the bottom plate tending to push the gun up.

1. Increase voltage

2. Decrease WFS

3. Decrease CTWD

4. Decrease drag angle

Equipment Troubleshooting Instructions are included in the operating manuals for the wire feeder and power source. Be sure to confirm the equipment is operating properly.

EFFECT OF OPERATING VARIABLES

The four major operating variables, arc voltage, wire feed speed (WFS), travel speed and CTWD, are interdependent. If one is changed, usually the other three must also be adjusted.

Arc Voltage

If WFS, travel speed and CTWD are held constant, changing the arc voltage will have the following effects:

1. Higher arc voltage results in a wider and flatter bead.

2. Excessive arc voltage causes porosity.

3. Low voltage causes a convex ropey bead.

4. Extremely low voltage will cause the wire to stub on the plate. That is, the wire will dive through the molten metal and strike the joint bottom, tending to push the gun up.

Wire Feed Speed (WFS) - (or welding current)

If arc voltage, travel speed and CTWD are held constant, WFS variations have the following major effects:

1. Increasing the WFS increases melt-off and deposition rates.

2. Excessive WFS produces convex beads. This wastes weld metal and results in poor appearance.

OPERATING GUIDE

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3. Increasing WFS also increases the maximum voltage which can be used without porosity. Lowering the WFS requires lowering the voltage to avoid porosity.

As the WFS is increased, the arc voltage must also be increased to maintain proper bead shape.

Travel Speed

If arc voltage, WFS and CTWD are held constant, travel speed variations have the following major effects:

1. Too high a travel speed increases the convexity of the bead and causes uneven edges.

2. Too slow a travel speed results in slag interference, slag inclusions and a rough, uneven bead.

Contact Tip to Work Distance (CTWD)

If the voltage and wire feed speed setting and the travel speed are held constant, variations in CTWD have the following major effects:

1. Increasing CTWD reduces the welding current. Decreasing CTWD increases current.

2. Increasing CTWD reduces actual arc voltage and results in more convex beads and reduces the tendency of porosity.

3. Momentarily increasing CTWD can be used to reduce burn-through tendency when poor fitup is encountered.

WELDER QUALIFICATION TEST

1. Remove mill scale and other contaminants from mating

surfaces of backing and test plates.

2. Preheat to 300°F for 3/8” (10 mm) thick welder qualification test.

3. Attach backing so that it is tight (NO GAP)

4. Use the least drag angle to keep the slag back from the arc.

5. Aging at 220°F, (104°C) for 48 hrs. is permitted by AWS

A5.20-95, paragraph A8.3. A naturally aged specimen may take months to achieve the specified properties.

Because design, fabrication, erection and welding variables affect the results obtained in applying this type of information, the serviceability of a product or structure is the responsibility of the builder/user.

OPERATING GUIDE

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In general, Innershield electrodes will produce weld deposits which achieve diffusible hydrogen levels below 16 ml per 100 grams deposited metal. These products, like other products which produce deposits low in diffusible hydrogen, must be protected from exposure to the atmosphere in order to;

(a) maintain hydrogen levels as low as possible (b) prevent porosity during welding (c) prevent rusting of the product.

Accordingly, the following storage conditions are recommended for Innershield electrodes in their original, unopened packages: The recommended storage conditions are such that they maintain environmental conditions above the dew point to prevent moisture condensation on product.

For best results, electrode should be consumed as soon as practicable. Properly stored electrode may be kept three years or more from the date of manufacture. Consult your Lincoln distributor or sales representative if there is a question as to when the electrode was made.

Once the electrode packaging is opened, Innershield electrodes can be contaminated by atmospheric moisture. Care has been taken in the design of these products to ensure that they are resistant to moisture pick-up; however, condensation of moisture from the atmosphere onto the surface of the electrode can be sufficient to degrade the product.

The following minimum precautions should be taken to safeguard the product after opening the original package. Electrode should be used within approximately 1 week after opening the original package. Opened electrodes should not be exposed to damp moisture conditions or extremes in temperature and/or humidity where surface condensation can occur. Electrodes mounted on wire feeders should be protected against condensation. It is recommended that electrode removed from its original packaging be placed in poly bags (4 mil minimum thickness) when not in use.

Innershield electrodes will evidence high moisture levels in the form of gas tracks, higher spatter and porosity. Any rusty electrode should be discarded.

STORING INNERSHIELD ELECTRODES

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Innershield Products Used for Applications Requiring More Restrictive Hydrogen Control (-H Electrodes)

The AWS specifications for flux-cored electrodes, AWS A5.20 and A5.29, state that “Flux-cored arc welding is generally considered to be a low hydrogen welding process”. Further, these specifications make available optional supplemental designators for maximum diffusible hydrogen levels of 4, 8 and 16 ml per 100 grams of deposited weld metal.

Some Innershield products have been designed and manufactured to produce weld deposits meeting these more stringent diffusible hydrogen requirements. These electrodes are usually distinguished by an “H” added to the product name. These electrodes will remain relatively dry under recommended storage conditions in their original, unopened package or container.

For applications in which the weld metal hydrogen must be controlled (usually H8 or lower), or where shipping and storage conditions are not controlled or known, only hermetically sealed packaging is recommended. Many Innershield electrodes are available in hermetically sealed packages.

Once the package has been opened, the electrode should be used as soon as practicable.

STORING INNERSHIELD ELECTRODES

Page 30

Plate Size – T (in) 14 GA 10 GA Pass 1 1 Electrode

Polarity CTWD 1” 1” Wire Feed Speed 50 75

(in/min) Arc Volts 16

(1)

Travel Speed (in/min) As Req’d As Req’d Deposit Rate (lbs/hr) 2.9 4.5

– 30 –

HORIZONTAL, FLAT, DOWNHILL

VERTICAL DOWN AND OVERHEAD

HORIZONTAL, FLAT, DOWNHILL AND

VERTICAL DOWN

.068" NR-232 DC( – )

5/64” NR-211-MP MP DC( – )

Plate Size – T (in) 16 GA 12 GA Pass 1 1 Electrode

Polarity CTWD 1” 1” Wire Feed Speed 40 60

(in/min) Arc Volts 15 16 Travel Speed (in/min) As Req’d As Req’d Deposit Rate (lbs/hr) 1.7 2.6

.068" NR-232 DC( – )

.068" NR-211-MP MP DC( – )

(1) Use 1 volt lower for Vertical Down and Overhead.

NR-211-MP WELDING PROCEDURES

Page 31

Plate Size – T (in) 3/4 and up Pass 1 2 & up Electrode

Polarity CTWD 1– 1-1/2 " 3/4 – 1"

Drag Angle 5 – 30° 0 – 30° Wire Feed Speed 110 – 135 150 – 170

(in/min) Arc Volts 18 – 19 19 – 21 19 – 21 20 – 22

Travel Speed (in/min) As Req’d As Req’d Deposit Rate (lbs/hr) 3.8 – 4.7 5.2 – 6.0

VERTICAL UP AND OVERHEAD BUTT WELDS

– OPEN ROOT

.068" NR-232 DC( – )

– 31 –

Plate Size – T (in) 5/16 3/8, 3/8 & Up Leg Size – L (in) 1/4 5/16 over 5/16 Pass 1 1 As req’d

Electrode Polarity

CTWD 3/4 - 1-1/4” Drag Angle 20 – 30°

Wire Feed Speed 165 – 320 165 – 250 (in/min) Arc Volts 20 – 22 25 – 27 20 – 22 23 – 24 Travel Speed (in/min) 15 17 As Req’d

Deposit Rate (lbs/hr) 5.9 11.3 5.9 – 8.6

FLAT AND HORIZONTAL FILLET WELDS

.068" NR-232 DC( – )

NR-232 .068” WELDING PROCEDURES

Page 32

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Plate Size – T (in) 3/8 & up Pass 1 2 & up Electrode

Polarity CTWD 3/4 – 1-1/4"

Drag Angle 5 – 20° Wire Feed Speed 155 165

(in/min) Arc Volts 21 22

Travel Speed (in/min) 4.3 – 5.6 As Req’d. Deposit Rate (lbs/hr) 5.5 – 5.9

VERTICAL UP AND OVERHEAD BUTT –

STEEL BACKUP

.068" NR-232 DC( – )

Plate Size – T (in) 5/16 3/8 3/8 & Up Leg Size – L (in) 1/4 5/16 over 5/16 Pass 1 1 As req’d

Electrode Polarity

CTWD 3/4 – 1" Drag Angle 0 – 30°

Wire Feed Speed 130 – 165 (in/min)

Arc Volts 19 – 21 21 – 23 Travel Speed (in/min) 6.5 – 9.5 5 – 7 As Req’d

Deposit Rate (lbs/hr) 4.5 – 5.9

ALL POSITION FILLET WELDS

.068" NR-232 DC( – )

NR-232 .068” WELDING PROCEDURES

Page 33

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Plate Size – T (in) 3/4 & up Pass 1 2 & up

Cap Passes

(Horizontal)

Electrode Polarity

CTWD 1 – 1-1/2" 3/4 – 1-1/4" Drag Angle 5 – 30° 0 – 30°

Wire Feed Speed 110 – 135 250 – 275 180 – 195 (in/min) Arc Volts 18–20/19–21 20–22/23–25 20–21/23–24 Travel Speed (in/min) 4.3 – 5.6 As Req’d As Req’d

Deposit Rate (lbs/hr) 3.8 – 4.6 8.6 – 9.5 6.2 – 6.8

FLAT AND HORIZONTAL BUTT WELDS

.068" NR-232 DC( – )

NR-232 .068” WELDING PROCEDURES

Page 34

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Plate Size – T (in) 5/16 3/8, 1/2 & up Leg Size – L (in) 1/45/16 3/8 & up Pass 1 1 As req’d

Electrode Polarity

CTWD 3/4 – 1" 3/4 – 1" 3/4 – 1" Drag Angle 0° 0 – 30° 0 – 30°

Wire Feed Speed 155 – 170 155 – 170 155 – 170 (in/min) Arc Volts 20 – 23 20 – 23 20 – 23 Travel Speed (in/min) 9.5 6.5 As Req’d

Deposit Rate (lbs/hr) 6.0 – 6.5 6.0 – 6.5 6.0 – 6.5

ALL POSITION FILLET WELDS

.072" NR-232 DC( – )

Plate Size – T (in) 3/4 & up Pass 1 2 & up cap Electrode

Polarity CTWD 1 – 1-1/2" 3/4 – 1" 3/4 – 1"

Drag Angle 5 – 30° 0 – 30°

(1)

0 – 30°

Wire Feed Speed 85 – 110 155 155 (in/min) Arc Volts 17 – 18 22 20 Travel Speed (in/min) As Req’d As Req’d As Req’d

Deposit Rate (lbs/hr) 3.3 – 4.3 6.0 6.0

.072" NR-232 DC( – )

VERTICAL UP AND OVERHEAD BUTT WELDS –

OPEN ROOT

(1)

At a travel speed of 10 in./min, a slight push angle is preferred.

NR-232 .072” WELDING PROCEDURES

Page 35

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VERTICAL UP AND OVERHEAD BUTT WELDS –

STEEL BACKUP

Plate Size – T (in) 3/8 & up Pass 1 2 & up cap Electrode

Polarity CTWD 3/4" 3/4” 3/4”

Drag Angle 0° 5 – 20° 5 – 20° Wire Feed Speed 155 155 155

(in/min) Arc Volts 22 22 20 Travel Speed (in/min) As Req’d As Req’d As Req’d

Deposit Rate (lbs/hr) 6.0 6.0 6.0

.072" NR-232 DC( – )

FLAT AND HORIZONTAL FILLET WELDS

(1)

For maximum penetration, point the electrode into the corner or slightly into the butting corner.

Plate Size – T (in) 5/16 3/8 3/8, & up Leg Size – L (in) 1/45/16 over 5/16 Pass 1 1 As req’d

Electrode Polarity

CTWD 3/4 – 1-1/4” 3/4 – 1-1/4” 3/4 – 1-1/4” Drag Angle 20 – 30° 20 – 30° 20 – 30° Wire Feed Speed 290 290 250

(in/min) Arc Volts 23 – 24 23 – 24 21 – 22 Travel Speed (in/min) 16 11.5 As Req’d

Deposit Rate (lbs/hr) 11 11 9.5

.072" NR-232 DC( – )

NR-232 .072” WELDING PROCEDURES

Page 36

– 36 –

Plate Size – T (in) 3/4 & up Pass 1 2-cap

Cap Passes

(Horizontal)

Electrode Polarity

CTWD 1-1/4 – 1-1/2” 3/4 – 1-1/4” 3/4 – 1-1/4” Drag Angle 5 – 30° 0 – 30° 0 – 30°

Wire Feed Speed 85 – 110 220 – 250 155 – 170 (in/min)

Arc Volts 17 – 18 20 – 22 20 – 21 Travel Speed (in/min) As Req’d As Req’d As Req’d

Deposit Rate (lbs/hr) 3.3 – 4.5 8.5 – 9.5 6.0 – 6.5

FLAT AND HORIZONTAL BUTT WELDS

.072" NR-232 DC( – )

NR-232 .072” WELDING PROCEDURES

Page 37

– 37 –

Plate Size – T (in) 5/16 3/8 1/2 Over 1/2 Leg Size – L (in) 1/4 5/16 3/8 Over 3/8 Pass 1 1 1 As req’d

Electrode Polarity

CTWD 3/4"

(2)

3/4"

(2)

7/8"

(2)

7/8"

(2)

Drag Angle 0° 0 – 20° 0 – 20° 0 – 20° Wire Feed Speed 120 130 130 130

(in/min) Arc Volts 19 – 20 20 – 21 20 – 21 20 – 21 Travel Speed (in/min) 8 6 4.5 As Req’d

Deposit Rate (lbs/hr) 5.7 6.2 6.2 6.2

ALL POSITION FILLET WELDS

5/64" NR-232 DC( – )

(2)

For best slag control, start at 1", then reduce.

FLAT AND HORIZONTAL FILLET WELDS

Plate Size – T (in) 5/16 3/8 Over 3/8 Leg Size – L (in) 1/4 5/16 over 5/16 Pass 1 1 As req’d

Electrode Polarity

CTWD 1” 1” 1” Drag Angle 20 – 30° 20 – 30° 20 – 30°

Wire Feed Speed 175 175 175 (in/min) Arc Volts 21.5 – 22.5 21.5 – 22.5 20.5 – 21.5 Travel Speed (in/min) 14 10.5 As Req’d

Deposit Rate (lbs/hr) 8.4 8.4 8.4

5/64" NR-232 DC( – )

NR-232 5/64” WELDING PROCEDURES

Page 38

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FLAT AND HORIZONTAL BUTT WELDS

VERTICAL UP BUTT WELDS –

OPEN ROOT

Plate Size – T (in) 3/8 & up Pass 1

(1)

2 & up

Electrode Polarity

CTWD 1-1/4 – 1-1/2” 1” Drag Angle 5 – 30° 5 – 30°

Wire Feed Speed 65 – 70 180 (in/min) Arc Volts 17 – 17.5 22 – 23 Travel Speed (in/min) As Req’d 5 – 9

Deposit Rate (lbs/hr) 2.9 – 3.2 8.7

5/64" NR-232 DC( – )

(1)

With a steel backup, start with the second pass procedure and a minimum root opening of 5/16".

Plate Size – T (in) 3/8 & up Pass 1 2 3 & up Electrode

Polarity CTWD 1-1/4 – 1-1/2 1"

(2)

Drag Angle 5 – 40° 0 – 30° 0 – 30° Wire Feed Speed 60 – 65 115 130

(in/min) Arc Volts 16 – 17 19 – 20 20 – 21 Travel Speed (in/min) As Req’d 3 – 5 3 – 5

Deposit Rate (lbs/hr) 2.7 – 2.9 5.5 6.2

5/64" NR-232 DC( – )

(2)

For best slag control, start at 1-1/4", then reduce.

NR-232 5/64” WELDING PROCEDURES

Page 39

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VERTICAL UP AND OVERHEAD BUTT WELDS –

STEEL BACKUP

Plate Size – T (in) 3/8 & up Pass 1 2 & up Electrode

Polarity CTWD 1"

(1)

Drag Angle 0 – 30° 0 – 30° Wire Feed Speed 115 130

(in/min) Arc Volts 19 – 20 20 – 21 Travel Speed (in/min) 3 – 5 3 – 5

Deposit Rate (lbs/hr) 5.5 6.2

5/64" NR-232 DC( – )

(1)

For best slag control, start at 1-1/4", then reduce.

NR-232 5/64” WELDING PROCEDURES

Page 40

– 40 –

Wire

Polarity, AWS Class. Wire Feed Arc Approx. Deposit

CTWD In (mm) Speed Voltage Current Rate

Wire Weight in/min (m/min) (volts) (amps) lbs/hr (kg/hr)

.120" NR-1 or NR-5 140 (3.6) 20 450 18.4 (8.3)

(DC+) E70T-3 160 (4.1) 21 500 22.0 (10.0)

1-3/8" (35) 240 (6.1) 23 700 33.0 (15.0)

2.63 lbs/1000” 320 (8.1) 25 850 43.0 (19.5)

5/32” NR-1 100 (2.5) 21 600 21.2 (9.6)

(DC+) E70T-3 130 (3.3) 23 810 30.0 (13.6)

1-1/2" (38) 150 (3.8) 24 900 35.0 (15.9)

4.07 lbs/1000” 220 (5.6) 26 1120 48.3 (21.9)

3/32” NR-5 100 (2.5) 22 340 7.8 (3.5)

(DC+) E70T-3 150 (3.8) 23 435 12.3 (5.6)

1-1/4" (32) 200 (5.1) 24 510 16.9 (7.6)

1.60 lbs/1000” 250 (6.4) 26 575 21.4 (9.7)

3/32” NR-131 150 (3.8) 25 390 11.6 (5.3)

(DC+) E70T-10 200 (5.1) 26 490 15.6 (7.1)

1-1/2" (38) 250 (6.4) 26 570 19.6 (8.9)

1.58 lbs/1000” 425 (10.8) 27 810 33.6 (15.2)

.045” NR-152 60 (1.5) 15 95 1.1 (0.5)

(DC-) E71T-14 90 (2.3) 16 135 1.8 (0.8)

5/8" (16) 120 (3.0) 17 160 2.5 (1.1)

.39 lbs/1000” 150 (4.6) 18 180 3.2 (1.4)

.062” NR-152 30 (0.8) 13 90 1.2 (0.5)

(DC-) E71T-14 50 (1.3) 15 140 2.0 (0.9)

5/8" (16) 70 (1.8) 16 185 2.8 (1.3)

.74 lbs/1000” 110 (2.8) 19 265 4.4 (2.0)

.068” NR-152 40 (1.0) 13 95 1.9 (0.9)

(DC-) E71T-14 50 (1.3) 14 120 2.4 (1.1)

3/4" (19) 80 (2.0) 16 190 3.9 (1.8)

.91 lbs/1000” 110 (2.8) 20 240 5.4 (2.4)

5/64" NR-152 40 (1.0) 16 125 2.5 (1.1) (DC-) E71T-14 80 (2.0) 19 260 4.9 (2.2)

1" (25) 100 (2.5) 21 310 6.1 (2.7)

1.15 lbs/1000" 125 (3.2) 24 355 7.6 (3.4)

(1) Single pass welding only.

(1)

OPERATING PARAMETERS

Page 41

– 41 –

Wire

Polarity, AWS Class. Wire Feed Arc Approx. Deposit

CTWD In (mm) Speed Voltage Current Rate

Wire Weight in/min (m/min) (volts) (amps) lbs/hr (kg/hr)

5/64” NR-202 50 (1.3) 19 150 2.0 (0.9)

(DC-) E71T-7 100 (2.5) 20 235 5.1 (2.3)

1-1/4” (32) 150 (3.8 )21 305 8.3 (3.8)

1.09 lbs/1000” 200 (5.1) 22 365 11.4 (5.2) 230 (5.8) 23 400 13.3 (6.0)

.068” NR-203MP 70 (1.8) 16 145 2.3 (1.0)

(DC-) E71T-8J 90 (2.3) 18 180 3.2 (1.5)

1" (25) 120 (3.0 20 225 4.3 (2.0)

.78 lbs/1000” 150 (3.8) 23 265 5.1 (2.3)

5/64” NR-203MP 50 (1.3) 16 130 1.9 (0.9)

(DC-) E71T-8J 90 (2.3) 19 220 4.2 (1.9)

1" (25) 120 (2.8) 20 280 5.3 (2.4)

1.03 lbs/1000” 140 (3.6) 22 310 6.8 (3.1)

5/64” NR-203 Ni (1%) 16 50 (1.3) 145 2.3 (1.0)

(DC-) E71T8-Ni1 18 70 (1.8) 195 3.3 (1.5)

1" (25) 20 110 (2.8) 275 5.3 (2.4)

1.52 lbs/1000” 21 120 (3.1) 290 5.8 (2.5)

22 140 (3.6) 310 6.9 (3.1)

3/32” NR-203 Ni (1%) 50 (1.3) 18 215 3.6 (1.6)

(DC-) E71T8-Ni1 70 (1.8) 19 260 5.1 (2.3)

1" (25) 95 (2.4) 21 315 7.0 (3.2)

1.52 lbs/1000” 110 (2.8) 22 345 8.1 (3.7) 130 (3.3) 23 385 9.6 (4.4)

.068” NR-207 80 (2.0) 17 190 3.0 (1.4)

(DC-) E71T8-K6 105 (2.7) 18 220 3.9 (1.8)

1" (25) 120 (3.0) 19 245 4.5 (2.0)

.78 lbs/1000” 170 (4.3) 21 300 6.5 (2.9)

(2) This electrode has been specifically designed for the demanding needs of pipe

welding.

(2)

OPERATING PARAMETERS

Page 42

– 42 –

Wire

Polarity, AWS Class. Wire Feed Arc Approx. Deposit

CTWD In (mm) Speed Voltage Current Rate

Wire Weight in/min (m/min) (volts) (amps) lbs/hr (kg/hr)

5/64" NR-207 & NR-207-H 70 (1.8) 17 205 3.4 (1.5)

(DC-) E71T8-K6 90 (2.3) 19 245 4.5 (2.0)

1-1/8" (29) 110 (2.8) 20 275 5.5 (2.5)

1.04 lbs/1000" 130 (3.3) 20 300 6.5 (2.9)

.035" NR-211-MP 14 50 (1.3) 30 .65 (0.3)

(DC-) E71T-11 15 70 (1.8) 60 1.00 (0.5)

5/8" (16) 16 90 (2.3) 90 1.35 (0.6)

.250 lbs/1000" 16.5 110 (2.8) 120 1.70 (0.8)

.045" NR-211-MP

70 (1.8) 15 120 1.1 (0.5)

(DC-) E71T-11 90 (2.3) 16 140 1.7 (0.8)

5/8" (16) 110 (2.8) 17 160 2.3 (1.0)

.39 lbs/1000" 130 (3.3) 18 170 2.7 (1.2)

.068" NR-211-MP

40 (1.0) 15 125 1.7 (0.8)

(DC-) E71T-11 75 (1.9) 18 190 3.4 (1.5)

1" (25) 130 (3.3) 20 270 6.1 (2.8)

.89 lbs/1000" 175 (4.4) 23 300 8.4 (3.8)

5/64" NR-211-MP

50 (1.3) 16 180 2.9 (1.3)

(DC-) E71T-11 75 (1.9) 18 235 4.5 (2.0)

1" (25) 120 (3.0) 20 290 7.4 (3.4)

1.17 lbs/1000" 160 (4.1) 22 325 10.0 (4.5)

3/32” NR-211-MP 50 (1.3) 16 245 4.2 (1.9)

(DC-) E71T-11 75 (1.9) 19 305 6.4 (2.9)

1-1/4” (32) 120 (3.0) 20 365 8.7 (3.9)

1.66 lbs/1000” 160 (4.1) 22 400 11.3 (5.1)

.045" NR-212 55 (1.4) 14 75 1.1 (0.5)

(DC-) E71TG-G 70 (1.8) 15 90 1.4 (0.6)

5/8" (16) 110 (2.8) 17 135 2.2 (1.0)

.39 lbs/1000" 150 (3.8) 19 170 3.0 (1.4)

.068" NR-212

60 (1.5) 16 145 2.4 (1.1)

(DC-) E71TG-G 75 (1.9) 18 180 3.2 (1.4)

1" (25) 120 (3.0) 20 230 5.2 (2.3)

.82 lbs/1000" 175 (4.4) 22 275 7.5 (3.4)

5/64" NR-212

60 (1.5) 16 200 3.3 (1.5)

(DC-) E71TG-G 75 (1.9) 18 225 4.1 (1.8)

1" (25) 110 (2.8) 20 275 6.2 (2.8)

1.06 lbs/1000" 150 (3.8) 22 325 8.4 (3.8)

(2) This electrode has been specially designed for the demanding needs of pipe welding.

Note: These are typical operating procedures and are not intended to serve as specific

procedures for any applications.

(2)

OPERATING PARAMETERS

Page 43

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Wire

Polarity, AWS Class. Wire Feed Arc Approx. Deposit

CTWD In (mm) Speed Voltage Current Rate

Wire Weight in/min (m/min) (volts) (amps) lbs/hr (kg/hr)

.068” NR-232 110 (2.7) 19 195 3.9 (1.8)

(DC-) E71T-8 150 (3.8) 20 250 5.3 (2.4)

1" (25) 195 (5.0) 23.5 300 7.0 (3.2)

.75 lbs/1000” 320 (7.4) 26 400 11.4 (5.2)

.072” NR-232 80 (2.0) 17 130 3.3 (1.5)

(DC-) E71T-8 140 (3.6) 19.5 225 5.5 (2.5)

1" (25) 170 (4.3) 21.5 255 6.5 (2.9)

.78 lbs/1000” 290 (7.4) 24 350 11.0 (5.0)

5/64” NR-232 60 (1.5) 17 145 2.7 (1.2)

(DC-) E71T-8 115 (2.9) 18 260 5.5 (2.5)

1" (25) 130 (3.3) 20.5 285 6.2 (2.8)

1.00 lbs/1000 180 (4.6)” 22.5 365 8.7 (3.9)

5/64” NR-305 175 (4.5) 22 295 8.8 (4.0) (DC+) E70T-6 260 (6.6) 24 385 13.1 (6.0)

1-3/8" (35) 280 (7.1) 25 405 14.2 (6.5)

1.05 lbs/1000 325 (8.3) 26 435 16.4 (7.5)

3/32” NR-305 160 (4.1) 22 330 11.0 (5.0) (DC+) E70T-6 240 (6.1) 25 425 16.7 (7.6)

1-3/4" (44) 300 (7.6) 28 475 21.0 (9.5)

1.39 lbs/1000” 400 (10.2) 34 525 28.0 (12.7)

5/64” NR-311 100 (2.5) 21 190 5.0 (2.3) (DC-) E70T-7 160 (4.1) 25 275 8.0 (3.6)

1-1/2" (38 240 (6.1) 26 355 12.4 (5.6)

1.07 lbs/1000” 300 (7.6) 28 410 15.8 (7.2)

3/32” NR-311 75 (1.9) 21 200 5.4 (2.5) (DC-) E70T-7 135 (3.4) 24 300 10.2 (4.6)

1-3/4" (44) 150 (3.8) 25 325 11.4 (5.2)

1.62 lbs/1000” 270 (6.9) 30 450 22.0 (10.0)

OPERATING PARAMETERS

Page 44

– 44 –

Wire

Polarity, AWS Class. Wire Feed Arc Approx. Deposit

CTWD In (mm) Speed Voltage Current Rate

Wire Weight in/min (m/min) (volts) (amps) lbs/hr (kg/hr)

7/64” NR-311 100 (2.5) 23 325 10.0 (4.5)

(DC-) E70T-7 145 (3.7) 25 400 14.5 (6.6)

1-3/4" (44) 240 (6.1) 30 550 25.5 (11.6)

2.05 lbs/1000” 300 (7.6) 33 625 33.0 (15.0)

5/64” NR-311 Ni 100 (2.5) 22 170 3.9 (1.8)

(DC-) E70TG-K2 160 (4.0) 26 235 6.5 (2.9)

1-1/4" (32 200 (5.0) 27 270 8.3 (3.8)

.93 lbs/1000” 240 (6.1) 28 295 10.0 (4.5)

3/32” NR-311 Ni 75 (1.9) 21 200 4.2 (1.9)

(DC-) E70TG-K2 100 (2.5) 22 245 5.9 (2.7)

1-1/2" (38) 150 (3.8) 26 330 9.1 (4.1)

1.39 lbs/1000” 200 (5.0) 28 390 12.3 (5.6)

7/64” NR-311 Ni 100 (2.5) 23 310 8.4 (3.8)

(DC-) E70TG-K2 140 (3.5) 25 370 11.8 (5.4)

1-3/4" (44) 200 (5.0) 29 470 17.0 (7.7)

1.89 lbs/1000” 240 (6.1) 30 520 20.4 (9.2)

5/64” NS-3M 200 (5.1) 30 280 10.1 (4.6)

(DC+) E70T-4 240 (6.1) 31 315 12.1 (5.5)

2-1/4” (57) 260 (6.6) 31 330 13.2 (6.0)

1.03 lbs/1000” 300 (7.6) 32 350 15.2 (6.9)

3/32” NS-3M 110 (2.8) 29 250 8.2 (3.7) (DC+) E70T-4 150 (3.8) 30 300 11.7 (5.3)

3" (76) 230 (5.8) 32 400 18.3 (8.3)

1.53 lbs/1000” 275 (7.0) (33 450 22.0 (10.0)

.120” NS-3M 140 (3.6) 29 380 15.5 (7.0) (DC+) E70T-4 175 (4.4) 30 450 20.0 (9.1)

3" (76) 200 (5.1) 31 500 23.2 (10.5)

2.34 lbs/1000” 225 (5.7) 32 550 26.2 (11.9)

.120” NS-3M 210 (5.3) 36 450 25.0 (11.3)

(DC+) E70T-4 250 (6.4) 37 500 29.0 (13.2)

4" (102) 300 (7.6) 38 550 34.0 (15.4)

2.34 lbs/1000” 355 (9.0) 39 600 39.5 (18.0)

OPERATING PARAMETERS

Page 45

– 45 –

The suggested operating parameters listed in this publication are not intended to serve as specific procedures for any application. These suggested procedures represent the approximates the procedure range of each individual electrode.

Arc voltage and/or wire feed speed may need to be adjusted depending upon welding position, type of weld, base steel surface condition or other factors. In general, use the highest voltage possible consistent with porosity-free welds.

CTWD is measured from the work surface to the contact tip.

Maintain this length within ±1/8” (3.2mm.) for CTWD ≤1” (25 mm)

or within ±1/4” ( 6.4 mm) for CTWD >1” (25 mm) during welding.

Contact your Authorized Lincoln Distributor or your local Lincoln Representative for specific procedures and techniques.

For more information on a particular Innershield wire, consult the C3.200.

OPERATING PROCEDURES

Page 46

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Full Size Drawings* of Parts for K126 and K206 Guns

Insulated

Guide for

K126

KP1995-1

for 2” (51 mm)

CTWD. Length:

1 7/8”

(48 mm)

Nose Cone

Assembly

for K126,

K264, K345,

K355, K361

KP1987-1

Length:

1 3/8”

(35 mm)

Thread

Protector

KP2089-1

Insulated Guide for

K126

KP2090-1

for 2 3/4”

(70 mm)

CTWD. Length:

2 3/4”

(70 mm)

KP2099-3 for

2 3/4” (70 mm) CTWD.

Length: 2 1/2” (64 mm)

KP2099-4 for

2” (51 mm) CTWD.

Length: 2 1/8” (54 mm)

KP2099-2 for 1 1/2” (38 mm) CTWD. Length: 1 5/8” (42 mm)

KP2099-1 for

3/4-1” (19-25 mm) CTWD.

Length: 1” (25 mm)

Insulated Guide

for K206

Contact Tip KP2100-xx

Electrode Contact Tip

Part No. Sizes (mm)

.062” (1.6) KP2100-2B1-1/16 .068”-.072”(1.7-1.8) KP2100-1B1-.072

5/64” (2.0) KP2100-4B1-5/64 3/32” (2.4) KP2100-3B1-3/32

Size stenciled on each tip.

Thread Protector for 3/4” to 1-1/2”

(19 to 38 mm) CTWD.

Note: When using the KP2089-1 Thread Protector on

a K126 or K309 gun with .062” through 3/32”

(1.6 through 2.4 mm) electrode, visible CTWD and

CTWD are identical.

* ll sizes of

insulated guides

NOT SHOWN

, order specific length needed by part number.

INNERSHIELD GUN PARTS

Page 47

– 47 –

Electrode Contact Tip

Sizes (mm) Part No.

1/16” (1.6) KP2103-2B1-1/16 .

068-.072” (1.7) KP2103-1B1-.072 5/64” (2.0) KP2103-5B1-5/64 3/32” (2.4) KP2103-4B1-3/32 7/64 (2.8) KP2103-6B1-7/64 .120” (3.0) KP2103-3B1-120

Insulated

Guide for K115

& K116 3/32 &

120 NS-3M

KP1965-1 for

2 3/4” (70 mm)

CTWD. (Shown)

KP1954-2 for 3 3/4” (95 mm)

CTWD. Length:

3 5/16”

(84 mm)

Contact Tip KP2103-xx

Insulated

Guide for K115

& K116

KP1971-1

for 1 1/2” (38 mm)

CTWD.

Extension Guide

for K289 - KP1994-1

5/64” (2.0 mm) for

3/4” (19 mm) CTWD.

Electrode Sizes Gun Tube 45˚ Gun Tube

For Gun

(1)

Inches (mm) (Nozzle) Part No. (Nozzle) Part No.

KP1920-1 --K126 & K309 KP1914-2 --K126 & K309 .062, .068, .072 KP1914-1 --K126 5/64, 3/32 KP1909-1 --K206 KP1921-1 --K115-

(1)

5/64 KP1919-2 KP1919-1

--- 3/32 KP1907-2 KP1910-2

--- 7/64, .120 KP1907-1 KP1910-1 K116-

(1)

3/32 KP1908-2 ---

--- 7/64, .120 KP1908-1 --K289-

(1)

3/32 KP1915-4 KP1915-2

--- 7/64, .120 KP1915-3 KP1915-1

Electrode Sizes Gun Tube

For Gun Inches (mm) (Nozzle)

(1)

Part No.

K345-10 .068, .072 90˚ nozzle - KP1920-1

& 5/64 62

˚ nozzle - KP1909-1

K355-10 30

˚ (Standard) - KP1914-2

˚ (Long) - KP1914-1

Full Size Drawings* of Parts for K115, K116 and K289 Guns

}

(1)

Several standard cable lengths, nozzles and wire sizes are available. See price book or your local Lincoln distributor for more detailed information.

* All sizes of insulated guides

NOT SHOWN

, order specific

length needed by part number.

Size stenciled on each tip.

INNERSHIELD GUN PARTS

Page 48

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LINCOLN

WELDING SCHOOL

Lincoln Welding School

22801 St. Clair Avenue Cleveland, Ohio 44117-1199

Ask for bulletin ED122

You may reach us at: 216.383.2259

NEED WELDING TRAINING?

The Lincoln Electric Company operates the oldest and most respected Arc Welding School in the United States at its corporate headquarters in Cleveland, Ohio. Over 100,000 men and women have graduated from this premier school.

Tuition is affordable and class schedules are flexible to meet your needs. For more information on the Lincoln Welding School, please write to:

Classes are in Session from 8:00 AM to 2:30PM

Basic Plate & Sheet Metal

5 Weeks

Plasma, Oxy-fuel, Alloy & Hardfacing

3 Weeks

Pipe — select: • ASME or • API

3 Weeks

Price covers machine beveled pipe nipples used each week. Prerequisite: Passing Basic Plate & Sheet Metal 5th Week Test

Gas Tungsten Arc Welding (GTAW - TIG)

1 Week

Price covers special alloy, aluminum, gas, etc. used each day.

Gas Shielded Arc Welding (GMAW - MIG) Semi-Automatic

1 Week

Flux Cored Arc Welding (FCAW) Semi-Automatic/Self Shielded/Gas Shielded: 1 Week

• Submerged Arc Welding (SAW) Semi-Automatic/FullAutomatic: 1 Week

• Comprehensive Arc Welder Course

15 Weeks

Includes All Above Courses

Page 49

– 49 –

Low Hydrogen Pipe Module: GMAW/FCAW/SMAW

1 Week

GTAW/SMAW

1 Week

Qualification Test Training: AWS Test Semi-Automatic Flux Cored Arc Welding Self Shielded (FCAW)

1 Week

3/8” AWS Fillet Test: Shielded Metal Arc Welding (SMAW — Stick)

(1)

1 Week

AWS Test Shielded Metal Arc Welding (SMAW - Stick)

(1)

1 Week

ASME Test Shielded Metal Arc Welding (SMAW — Stick)

(1)

1 Week

ASME or API Pipe Welding Test Training

(1)

1 Week

Low Hydrogen Pipe Welding Test Training

(1)

1 Week

Certified Welding Inspector Course

(1)

1 Week

(1)

Actual Testing done in customer’s plant or Independent Testing Laboratory

Page 50

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NOTES

Page 51

– 51 –

NOTES

Page 52

– 52 –

CUSTOMER ASSISTANCE POLICY

The business of The Lincoln Electric Company is manufacturing and selling high quality welding equipment, consumables, and cutting equipment. Our challenge is to meet the needs of our customers and to exceed their expectations. On occasion, purchasers may ask Lincoln Electric for advice or information about their use of our products. We respond to our customers based on the best information in our possession at that time. Lincoln Electric is not in a position to warrant or guarantee such advice, and assumes no liability, with respect to such information or advice. We expressly disclaim any warranty of any kind, including any warranty of fitness for any customer’s particular purpose, with respect to such information or advice. As a matter of practical consideration, we also cannot assume any responsibility for updating or correcting any such information or advice once it has been given, nor does the provision of information or advice create, expand or alter any warranty with respect to the sale of our products.

Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control of, and remains the sole responsibility of the customer. Many variables beyond the control of Lincoln Electric affect the results obtained in applying these types of fabrication methods and service requirements.

Subject to Change — This information is accurate to the best of our knowledge at the time of printing. Please refer to www.lincolnelectric.com for any updated information.

Cored Wire

C3.2400 2/04

TEST RESULTS

Test Results for Mechanical Properties, Deposit or Electrode Composition and Diffusable Hydrogen levels were obtained at a single point in time under laboratory conditions from random samples of representative material. Your results may vary within AWS specification limits depending on a variety of conditions.

Lincoln Electric NR-203MP, NR-232, NR-202, NR-211-MP, NR-203 Nickel (1%) Welding Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual