Stainless steel welding wire as the filling metals for welding, with added elements, works in certain degree to protect the welding seams and promote the melting of the wire and the basic metals. This type of welding wire keeps the metal property of its stainless steel itself. The welding wire has more elements than steel wire and can add the burned metal elements caused by welding during the process, hence to make the joints with the same property with its base materials