... alloy steel. 2. Welding stainless steel, high alloy steel, copper, silver, molybdenum ZX7-160S, ZX7-200S, ZX7-250S, ZX7-315S, ZX7-400S, ZX7-500S, ZX7-630SIGBT inverter manual ... arc welding machineCharacteristics and application:Application: 1 ...