... Steel Bar Standard: GB/T 3078, GB/T905 Steel Grade: 10#,15#,20#,30#,35#,40#,45#, Specification : 6-80MM Commodity:Cold Drawn ... Round Bars1) Standard: GB/T 3078, GB/T9052) Steel Grade: 10#,15#,20#,30#,35#,40#,45#,40Cr.3) Specification : 6-80MM4) Alloy ...