co2 gas shielded 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 ER70S-6 have excellent mechanical ... , beautiful seam.Suitable for all-position welding work.2) applications: Widely used as welding carbon steel wires in shipbuilding,Bridge building, machinery manufacturing ...