Carbon steel MIG welding wire is designed for use on mild steel, and in general purpose welding on clean or prepared surfaces. Deposits require minimal slag removal. Use with CO2 or argon-CO2 shielding gas. DC reverse polarity. MIG Welding Wire, ER70S-6, Carbon Steel, Dia. (In.) 0.030, Container 11 lb. Spool, Min. Tensile Strength (PSI) 84000, Can Be Used On Sheet Metal or Fabrication Applications Where a Smooth Weld Bead is Desired