... 3078, GB/T905 Steel Grade: 10#,15#,20#,30#,35#,40#,45#, Specification : 6-80MM Commodity:Cold Drawn Steel Round Bars1) Standard ... 3078, GB/T9052) Steel Grade: 10#,15#,20#,30#,35#,40#,45#,40Cr.3) Specification : 6-80MM4) Alloy: Is alloy.5) Feature ...