... 15#,20#,30#,35#,40#,45#, Specification : 6-80MM Commodity:Cold Drawn Steel Round Bars1) Standard: GB/T 3078, GB/T9052) Steel ... 30#,35#,40#,45#,40Cr.3) Specification : 6-80MM4) Alloy: Is alloy.5) Feature: good surface and high dimension precision.6) Application ... , Condensor; Pipeline; Mechanical Machine; Structure; Automobile.3) All steel alloy pipe products are made under ISO 9001. Our Advantages: 1 ...