... ,304,304L,304Cu,316,316L,310,310S,309 400 series-410,416,420,430 stainless steel round bar2.standard:ASTM A ... ,JIS G 4311,JIS G4318.3. production procedure: raw elements(C,Fe,Ni,Mn,Cr,Cu etc.,)--smelted ingots by AOD ... available,pls feel free to contact with me round bar 410, 420, 430, 431