... 302,304,304L,304H,309S,310S,316,316L,321,347… 400 series: 410,420,430,431,434…B) Hardness Classification:Soft ... Oxidation; Burnishing; Coppering; Lead plating and so onD) Purpose Classification:For spring; cold upsetting; welding; wire ropeE )Physical Classification:Magnetic ... and advanced production technology.All kinds of 200 series 300 series 400 series stainless wire range from diameter 0.25mm to ...