... 300 series-301,302,303,303Cu,304,304L,304Cu,316,316L,310,310S,309 400 series-410,416,420,430 stainless ... we have large stocks,diameter from 1mm-500mm6.application:the SS round bar is widely used in chemical, shipping,architecture,machine ... with me stainless steel round bar 304, 304L, 321, 316, 316L