... 1 phrase,110v/220v/230v/240v 50-60hz portable tig welding machine,1 phrase,110v/220v/230v/240v,50-60hz ... -200 AMPs at 60% duty cyclethickness of workpiece for TIG welding:5mmDC(weld all metal materials except aluminum) Highlighted Features: ... frequency arc start,high speed MOSFET control Technology,200Amps DC TIG welding current Typical Applications:hobby, industrial automation, oil / chemical textile ...