MIG Welding Wire AWS Classification ER70S-6 Material Carbon Steel Process MIG Welding (GMAW) Wire Diameter 0.045 in Tensile Strength (As Welded) 81 ksi (100 Percent Carbon Dioxide) 82 ksi (75 Percent Argon/25 Percent Carbon Dioxide) 84 ksi (90 Percent Argon/10 Percent Carbon Dioxide) 82 ksi (98 Percent Argon/2 Percent Oxygen) Yield Strength (Minimum Required) 58 ksi