alloy steel flat bar cold-drawing ,widespread in auto,machine,upholster, medical etc. alloy steel flat barmaterial:40Cr,20Cr,35CrMo,60Si2Mn,67SiCr5,YF45MnV,50Mn,60Mn,40Mn2,45Mn5 and so onSpecifiaction:4-20mm*10-180mmPlease send your detailed requirement,and we will quote a competitive price for you!