What are stainless steel electrodes in welding?

A 309 or 312 SMAW electrode which is also known as welding rod is a good choice for stick welding stainless steel, especially for maintenance or repair applications. It offers high cracking resistance and good strength, and typically can join stainless steel already in service, even if the specific material grade isn’t known.

DIFFUSALOY 309 L and 309 Mo, are the products manufactured by diffusion engineers which are best for the welding of stainless steels of AISI types.