... Cold Drawn Round Steel Bar Standard: GB/T 3078, GB/T905 Steel Grade: 10#,15#,20#,30#,35#,40#,45#, Specification : 6 ... -80MM Commodity:Cold Drawn Steel Round Bars1) Standard: GB/T ... #,30#,35#,40#,45#,40Cr.3) Specification : 6-80MM4) Alloy: Is alloy.5) Feature: good ... surface and high dimension precision.6) Application: absor and brake bar of automobile. ...