MIG Welding Wire AWS Classification ER70S-6 Material Carbon Steel Process MIG Welding (GMAW) Wire Diameter 0.03 in Tensile Strength (As Welded) 78 ksi (100 Percent Carbon Dioxide) 82 ksi (75 Percent Argon/25 Percent Carbon Dioxide) 85 ksi (90 Percent Argon/10 Percent Carbon Dioxide) Yield Strength (Minimum Required) 58 ksi