Lincoln Electric MC-715 User Manual

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Metalshield

Mild Steel Metal-Cored Wire (AWS E70C-6M H8)

Metalshield MC-715 is designed for virtually slag free deposits in single or multiple pass welding applications. Its design achieves robust low temperature impacts and can be used in semiautomatic and automatic applications. Excellent for welding over scale or surface contaminants.

MC-715

CORED WIRE

Advantage Lincoln

• Smooth, spray-type arc transfer and low spatter level.

• High deposition efficiency.

• Good resistance to porosity on mill scale.

• Excellent "fast follow" characteristics.

• Robust low temperature impact properties.

• Manufactured under a quality system certified to ISO 9001 requirements.

Typical Applications

• Mining equipment

• Heavy equipment

• Offshore

• General structural fabrication

DIAMETERS/PACKAGING

Diameter 33 Lb. (15kg) in. (mm) Plastic Spool Foil Bag

.045 (1.1) ED030944

1/16 (1.6) ED030945

Welding Positions

Shielding Gas

75-95% Argon / Balance CO Flow Rate: 30-45 CFH

Higher argon percentage will lower the amount of generated welding fume. A 15-25% CO2range may be used for improved arc characteristics when welding in the short circuiting mode.

Conformance

AWS A5.18-01: E70C-6M H8 ASME SFA-5.18: E70C-6M H8 BV: SA3-3YMHH ABS: 4Y403H DNV: IV Y40H5 GL: 4Y40H5S LR: 4Y40H5

Diffusible Hydrogen - As required per AWS A5.18-01

Requirements (AWS E70C-6M H8) ≤ 8.0 Test Results: 80% Ar/20% CO

MECHANICAL PROPERTIES – As Required per AWS A5.18-01

Yield Tensile

Strength Strength Elongation Charpy V-Notch, ft•lbf (Joules)

psi (MPa) psi (MPa) (%) @ -20ºF (-29ºC) @-40°F(-40°C) @-51°F(-46°C)

Requirements 58,000 (400) 70,000 (483) 22 20 (27)

AWS E70C-6M H8 min. min. min. min.

Test Results

80% Ar/20% CO

65,000-71,000 76,000-81,000 25-31 Exceeds 76-115 69-88

(460-490) (527-556) Requirements (103-156) (94-119)

Not Specified Not Specified

2.0 - 5.0

Publication C3.11.1 5/05

www.lincolnelectric.com

DEPOSIT COMPOSITION - As Welded per AWS A5.18-01

%C %Mn %S %P %Si %Ni %Cr %Mo %V %Ni+%Cr+%Mo+%V

Requirements 0.12 1.75 0.03 0.03 0.90 0.50 0.20 0.30 0.08 0.50

AWS E70C-6M H8 max. max. max. max. max. max. max. max. max. max.

Test Results

80% Ar/20% CO

0.02-0.06 1.36-1.73 0.02-0.03 0.01-0.02 0.32-0.50 0.01-0.04 0.03-0.05 0.01-0.02 0.01 0.07-0.11

TYPICAL OPERATING PROCEDURES

Diameter

Polarity

(1)

CTWD

Wire Weight in/min Voltage Current Rate Rate Efficiency

Shielding Gas (m/min) (volts)

.045” (1.1 mm) 110 (2.8) 15 90 2.7 (1.2) 2.4 (1.1) 89

DC+ 135 (3.4) 16 120 3.4 (1.5) 3.0 (1.4) 88

3/4-1” (19-25 mm) 185 (4.7) 17 150 4.6 (2.1) 4.2 (1.9) 91

.420 lbs./1000” (7.5 g/m) 250 (6.4) 28-30 180 6.5 (3.0) 6.0 (2.7) 92

75-95% Ar/ 450 (11.5) 31-34 275 11.6 (5.3) 10.6 (4.8) 91

Balance CO

1/16” (1.6 mm) 70 (2.0) 15 145 3.6 (1.7) 3.3 (1.5) 92

DC+ 80 (2.1) 16 160 4.1 (1.9) 3.7 (1.7) 90

1” to 1-1/4” (25-32 mm) 90 (2.3) 18 170 4.6 (2.1) 4.2 (1.9) 91

.765 lbs/1000” (13.7 g/m) 150 (3.8) 25-26 235 7.0 (3.2) 6.4 (2.9) 91

75-95% Ar/ 250 (6.4) 29-32 325 12.1 (5.5) 11.0 (5.0) 91

Balance CO

Wire Feed Speed Approx. Melt-Off Deposition

(2)

(amps) lbs/hr (kg/hr) lbs/hr (kg/hr) (%)

650 (16.5) 35-38 340 16.5 (7.5) 15.0 (6.8) 91

350 (8.9) 34-37 400 16.9 (7.7) 15.4 (7.0) 91 450 (11.4) 36-38 460 22.0 (10.0) 20.1 (9.1) 91

(1)

To estimate ESO, subtract 1/4” (6.0mm) from CTWD.

(2)

For greater percentage of CO2shielding gas, increase voltage by 1-2 volts.

NOTE: Shaded areas are recommended procedures for short circuiting mode with 75-85% Ar/Balance CO2.

Material Safety Data Sheets (MSDS) and Certificates of Conformance are available on our website at www.lincolnelectric.com

Test results for mechanical properties, deposit or electrode composition and diffusible hydrogen levels were obtained from a weld produced and tested according to prescribed standards, and should not be assumed to be the expected results in a particular application or weldment. Actual results will vary depending on many factors, including, but not limited to, weld procedure, plate chemistry and temperature, weldment design and fabrication methods. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended application.

TEST RESULTS

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.

THE LINCOLN ELECTRIC COMPANY

22801 St. Clair Ave., Cleveland, OH 44117-1199 • 216.481.8100 • www.lincolnelectric.com