... Length:according to client's request 420 stainless steel square bar Surface:black,bright,polished,peeled,Length:according to ... company mainly produces stainless steel round bars, hexagon bars, square bars, flat steel, angle steel and other stainless steel ... , 310,310 S, 316,316 321,430,430 F, L, 431,410,410 S, 416,420,420 ... F. Standard: AISI, ASTM, GB, JIS, BS, DIN. Use: ...