1.steel grade: SAE1006-SAE1018, S20C-S55C,C1118,Y15Pb,SUM22L,11SMnPb30,SUM24, ... manufacture specialised in making cold drawn steel bars including round steel bars, square steel bars, flat steel bars, turret / hexagon steel bars, cold drawn wire rod. And the steel grade contains: 12L14,SAE ... demand if you need other grades or sizes. 4140 Y15Pb Cold drawn steel wire