square wave ac/dc tig welder can used to welded aluminum,aluminum alloy,magnesium alloy,carbon steel,stainless steel 1.upgrade square wave power source,current with high ... ,stainless steel,copper ,titanium etc metal parameter: ModelTIG200 AC/DCTIG200BAC/DCTIG250AC/DCTIG315BAC/DC rated input voltage (V)220V±15%220V±15%220V ...