... 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 ... T9052) Widely for HRSG, Boiler; Heat Exchanger, Condensor; Pipeline; Mechanical Machine; Structure; Automobile.3) All steel alloy pipe products are made ...