... carbon steel,stainless steel,alloyed steel,coppe,titanium etc. WS SERIES IGBT INVERTER DC ARGON WELDING MACHINE Model number:WS-315WS ... )64 V72V72V80VReglulating range current(A)10-315 A10-400 A20-500 A30-630 ARated Duty cycle(%)60%60%60%60%Efficiency ... for high-quality welding seams and good forming performance. WS SERIES IGBT INVERTER DC ARGON WELDING MACHINE