... Steel Bar Standard: GB/T 3078, GB/T905 Steel Grade: 10#,15#,20#,30#,35#,40#,45#, Specification : 6-80MM Commodity:Cold ... Grade: 10#,15#,20#,30#,35#,40#,45#,40Cr.3) Specification : 6-80MM4) Alloy: Is alloy.5) Feature: good surface and high dimension ... absorber and braker bar of automobile with good surface and high dimension precision. Cold Drawn Round Steel Bar