mig/co2 welding wire ER70S-6 Material of Co2 welding wire: CO2 Gas Shielded Welding Wire, co2 mig welding wire, mig welding is made from excellent Ho8Mn2SiA steel by drawing, straightening and copper coating. Features and application of Co2 welding wire: Stable electric arc, low splashing, high deposition efficiency and good welding seam.Co2 welding wire can be welded automatically or semi-automatically.The Co2 welding wires are widely used on low carbon steel and low alloy steel, rolling stock, container, engineering machinery, and pressure container, etc.