4340 alloy steel bar 1.Grade:200,300,400 series 2.Size: 5mm* ... 3.Surface: cold draw,pickled ,polished etc stainless steel square bar 1.Grade:ss201,202,301,302,303,304 ,304l,316 ... ASTM,JIS,AISI,DIN,EN,SUS etc.5.Stianless steel square bar is widely applied for petroleum,chemical,mechanical and electrical,hardware ... can build good & long cooperation . 300 sereis stainless steel square bar 4340 alloy steel ...