... then cold drawn,surface settlements include black,picking,bright,drawn bench stainless steel bright bar1.material:201 202 301 304 316 321 ... 316 310S 410 420 430 17-4PH etc.,stainless steel bright bar2.procedure:hot rolled and cold drawn stainless steel ... bright barraw materials(nickle,crown,etc.,)---smeting into ingots by AOD ...