... ),DC TIG, DC Pulse TIG 3 functions in one machine. Available on welding carbon steel, alloy steel, stainless steel, copper, silver, titanium ... advance, Delay Gas stop, Current climbing, Current Attenuating, ect. moverover the parameter can be adjusted continuously.Available adjusted on pulse frequency ... -50DC TIG5-400TIG-400P TIG-P Series Inverter TIG Pulse Welding Machine