... steel bar 1.Grade:200,300,400 series 2.Size: 5mm*5mm-260*260mm 3.Surface: cold draw,pickled ,polished etc stainless steel ... square bar 1.Grade:ss201,202,301,302,303,304 ... ,AISI,DIN,EN,SUS etc.5.Stianless steel square bar is widely applied for petroleum,chemical,mechanical ... & long cooperation . 300 sereis stainless steel square bar 4340 alloy steel bar