... ,304,304L,304Cu,316,316L,310,310S,309 400 series-410,416,420,430 stainless steel round bar2.standard:ASTM A ... we have large stocks,diameter from 1mm-500mm6.application:the SS round bar is widely used in chemical, shipping,architecture,machine ... available,pls feel free to contact with me round bar 410, 420, 430, 431