WSE5 series is most suitable for welding aluminum and its alloy.magnesium and its alloy,various stain less steels and both high and low-alloy steels with or without filling in additon to working as AC/DC Tig welder arc welder, it can also be used manually to welder,it can also be used manually to weld lowcarbon steel and common low-alloy steel with the electoldes of all kinds, therefore as a new-generation multi-purpose welder, it is your best choice for it's four purposes and excellent performance.