... welding wire ER70s-6 welding carbon steel,500MPa high strength steels,welding in cars,building,bridges copper coated co2 gas shielded welding wire AWS ER70s-61) welding wire ... steel wires in shipbuilding,Bridge building, machinery manufacturing and general welding purposes3) sizes: 0.8mm,0.9mm,1.0mm ... 1kg,5kg,15kg,18kg,20kg chemical composition of welding wire(%)CMnSiPSCrNiCu0.06~0.151.40~1.850.80~ ...