Mig welding wire,Co2 welding wire,ER70S-6 Mig welding wire,Co2 welding wire,ER70S-6"ER70S-6 is a kind of mild steel copper coated welding ... wire, suitable for 100% ... ,B,D,E,A36,D36,E36)and equivalent mild steel or 550Mpa grade mild alloy steel, such as container building, construction machine, railway ...