... 10-50mm 3. Hot rolled, black surface BS4449 deformed steel bars quality: AST615 BS4449 B500B HRB300 HRB400 HRB500 and so onSpecification ... -C80,41Cr4,SAE5140,42CrMo4,SAE4140,SUP9,55Cr3,SUP10,50CrV4,SUJ2,100Cr6,SAE52100,etcGB, DIN, JIS, ASTMSquare bar25*25mm to ... -C80,41Cr4,SAE5140,42CrMo4,SAE4140,SUP9,55Cr3,SUP10,50CrV4,SUJ2,100Cr6,SAE52100,5CrNiMo,5CrMnMo,20CrMnTi,86CrMoV7,20CrNiMo,2CR13,4Cr13GB, DIN ...