... , 316,316L,410,420,430,etc. 2.hot rolling and cold rolling 1.material: 201,202,301,304,310S,316,321 ... into black surface--pickling into acid liquid--cold drawn--polished by automatically machine--cutting into pieces--checking quality--package3.surface ... :black,pickling,polish, mirror polishing,satin,milling,cold drawn,drawn ...