... High frequency arc start design 3.Reasonable price WSE Series AC/DC Pulses Square-Wave Argon-Arc Welding MachineFeatures ... stainless steel, alloy steel, carbon steel, copper and other color metal, AC welding for aluminum4. ... ,steel, copper, titanium, etc. 2. WSE series digital welding machine welding thickness is 0.3-10mm3 ... alloy steel, carbon steel, copper and other color metal, AC welding for aluminum