type 304 stainless steel compositiontype 304 stainless steel propertiestype 304 steeltype 304 stainless steel tubingaisi type 304 stainless steeltype 316 stainless steel304 stainless steel finish typestype 302 stainless steeltype 304stick welding 304 stainless steeltype 304l stainless steeltype 316 steel