... cold drawn,forged,surface settlements include black,picking,bright,etc.,stainless steel bar 1.material:201 202 301 304 316 321 316 ... 310S 410 420 430 17-4PH ETC.,stainless steel hexagonal bar2.procedure:hot rolled, cold drawn, forged,etc ... into pieces---making them straight---package by steel strip and plastic3.size:1-100mm stainless steel hexagonal bar4.surface settlements:black,picking,bright ...