4340 alloy steel bar 1.Grade:200,300,400 series 2.Size ... 3.Surface: cold draw,pickled ,polished etc stainless steel square bar 1.Grade:ss201,202,301,302,303, ... ASTM,JIS,AISI,DIN,EN,SUS etc.5.Stianless steel square bar is widely applied for petroleum,chemical,mechanical ... ,321,410,420,etc. applicationwidely used in the areas as ss fasteners , chains , kitchen and sanitary wares ,furniture handles , ...