... 10-50mm 3. Hot rolled, black surface BS4449 deformed steel bars quality: AST615 BS4449 B500B HRB300 HRB400 HRB500 and ... : 10-40mm ProcessingProductsSpecificationGradeStandardHotrolledsteelRound barDia 12mm to 300mmSS400,Fe360,C22-C80,41Cr4,SAE5140,42CrMo4,SAE4140,SUP9,55Cr3,SUP10,50CrV4 ... ASTM and BSForged steelRound barDia 200mm to 1000mmC22-C80,C22-C80,41Cr4,SAE5140,42CrMo4,SAE4140,SUP9,55Cr3,SUP10, ...