Mild steel welding wire is widely used in ship, vehicle, bridge, engineering machinery and other many fields. Mild steel welding wire is high anti-corrosion, it uses CO2 gas shielded welding and widely applied in marine boilers, marine pipelines and marine cargo manufacturing industry. Our ER70S2 mild steel welding wire is coated by copper layer, it is of high anti-corrosion character and specially for 35# and 45# steel welding.