... Welding carbon steel, low alloy steel.2. Welding stainless steel, high alloy steel, copper, silver, molybdenum, titanium and other metals. ... Characteristics:Ideal static external characteristics and good dynamic property.Ensure high stability of welding current under electric fluctuation and adjustment of ... Gas Flow (L/min)25L/min ZX7-400S, ZX7-500S IGBT inverter manual arc welding machine