... steel wires in shipbuilding,Bridge building, machinery manufacturing and general welding purposes3) sizes: 0.8mm,0.9mm,1.0mm,1.2mm ... D200mmD270mm D300mm K300mm 1kg,5kg,15kg,18kg,20kg chemical composition of welding wire(%)CMnSiPSCrNiCu0.06~0.151.40~1.850.80~1 ... rust.Before welding please clean out the oil,rust,water etc from the work parts co2 welding wire AWS ER70s-6 of copper ...