... 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 ... ,1.2mm,1.6mm,2.0mm4) weight per spool/roll: 4.5kg,4.7kg,5kg,15kg,18kg,20kg5) package: one spool/roll ... D300mm K300mm 1kg,5kg,15kg,18kg,20kg chemical composition of welding wire(%)CMnSiPSCrNiCu0.06~0.151.40~1.850.80~1.15 ...