SG2 copper coated welding wire ER70s-6 welding carbon steel,500MPa high strength steels,welding in cars,building,bridges SG2 copper coated co2 welding wire AWS ER70s-61) welding wire ER70S-6 have excellent ... shipbuilding,Bridge building, machinery manufacturing and general welding purposes3) sizes: 0.8mm,0.9mm,1.0mm,1.2mm,1.6mm,2.0mm4) weight per spool ...