... steel structure,eg.cotnainer,building in spools mig welding wire Copper coated welding wire, suitable for 100% CO2 and Argon& CO2 mixed ... for all-position welding work. The series of welding wire can be used to weld ship building steelcopper coated welding ... ,D36,E36)and equivalent mild steel or 550Mpa grade mild alloy steel, such as container building, construction machine, railway construction, ...