Lincoln Electric MC-706 Welder User Manual


 
%C %Mn %Si %S %P %Ni
Requirements 0.12 1.75 0.90 0.03 0.03 0.50
AWS E70C-6M H8 max. max. max. max. max. max.
Test Results 0.03– 1.28– 0.63– 0.029 0.01 0.33–
75% Ar/25% CO
2
0.04 1.49 0.76 max. max. 0.45
Diameter
Polarity
CTWD
(1)
Wire Feed Speed Approx. Melt-Off Deposition
Wire Weight in/min Voltage Current Rate Rate Efficiency
Shielding Gas (m/min) (volts)
(2)
(amps) lbs/hr (kg/hr) lbs/hr (kg/hr) (%)
200 (5.1) 21-23 155 5.0 (2.3) 4.6 (2.1) 92
250 (6.4) 22-24 185 6.2 (2.8) 5.8 (2.6) 94
300 (7.6) 22-26 220 7.7 (3.5) 7.0 (3.2) 91
.045" (1.2 mm) 350 (8.9) 22-27 245 8.9 (4.0) 8.2 (3.7) 93
DC+ 400 (10.2) 23-27 260 10.1 (4.6) 9.4 (4.3) 93
3/4-1" (19-25 mm) 450 (11.4) 23-28 280 11.4 (5.2) 10.7 (4.9) 94
0.42 lbs./1000 (7.4 g/m) 500 (12.7) 23-29 305 12.6 (5.7) 12.2 (5.5) 97
90% Ar/10% CO
2
550 (14.0) 24-29 315 13.9 (6.3) 13.6 (6.2) 98
600 (15.2) 25-30 325 15.1 (6.8) 14.8 (6.7) 98
650 (16.5) 26-30 355 16.5 (7.5) 16.3 (7.4) 98
700 (17.8) 26-30 360 17.7 (8.0) 17.5 (7.9) 99
200 (5.1) 22-24 210 6.7 (3.0) 6.3 (2.9) 94
.052" (1.3 mm) 250 (6.4) 22-26 260 8.5 (3.9) 7.8 (3.5) 92
DC+ 300 (7.6) 22-27 290 10.2 (4.6) 9.5 (4.3) 94
3/4-1" (19-25 mm) 350 (8.9) 23-27 315 11.8 (5.4) 11.4 (5.2) 97
0.56 lbs./1000 (9.9 g/m) 400 (10.2) 24-28 350 13.8 (6.3) 13.4 (6.1) 97
90% Ar/10% CO
2
450 (11.4) 25-28 370 15.2 (6.9) 15.1 (6.8) 99
500 (12.7) 27-29 390 16.9 (7.7) 16.8 (7.6) 99
550 (14.0) 27-30 420 18.5 (8.4) 18.3 (8.3) 99
150 (3.8) 22-24 230 7.0 (3.2) 6.2 (2.8) 89
1/16" (1.6 mm) 200 (5.1) 22-25 280 9.4 (4.3) 8.7 (3.9) 93
DC+ 250 (6.4) 23-28 310 11.6 (5.3) 11.0 (5.0) 94
3/4-1" (19-25 mm) 300 (7.6) 24-29 370 13.9 (6.3) 13.8 (6.3) 99
0.78 lbs./1000 (13.9 g/m) 350 (8.9) 26-30 400 16.3 (7.4) 15.9 (7.2) 98
90% Ar/10% CO
2
400 (10.2) 26-31 450 18.4 (8.3) 18.4 (8.3) 100
450 (11.4) 27-31 480 21.0 (9.5) 20.6 (9.3) 98
(1)
To estimate ESO, subtract 3/16” (4.8mm) from CTWD.
(2)
For greater percentage of CO
2
shielding gas, increase voltage by 1-2 volts.
TYPICAL OPERATING PROCEDURES
DEPOSIT COMPOSITION - As Welded per AWS A5.18-01
THE LINCOLN ELECTRIC COMPANY
22801 St. Clair Ave., Cleveland, OH 44117-1199 • 216.481.8100 • www.lincolnelectric.com
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
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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.
TEST RESULTS
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.