... 310S,316,316L,321, About 300 series stainless steel welding wire300 series stainless steel welding wire are with high chemical inertness, ... industry, machinery, medical, food, electron, chemical, aviation. stainless steel welding wire products:A) Material Classification: 200 series: 201, ... ) Shape classification:Round wire; Half Round Wire; Square wire; pressure flat wire; precision shaped wire