A) Material Classification: 200 series: 201, 202 300 series: 301,302,304,304L,304H,309S,310S,316,316L,321, About 300 series stainless steel welding wire300 series stainless steel welding wire are with high chemical inertness, elasticity and tenacity, widely applies to the lines of industry, machinery, medical, food, electron, chemical, aviation. stainless steel welding wire products:A) Material ...