steel bars Grade:ASTM615 BS4449 B500B,etc steel bars|:quality: AST615 BS4449 B500B HRB300 HRB400 HRB500 and so onSpecification: 10-40mmProcessingProductsSpecificationGradeStandardHotrolledsteelRound barDia 12mm to 300mmSS400,Fe360,C22-C80,41Cr4,SAE5140,42CrMo4,SAE4140,SUP9,55Cr3,SUP10,50CrV4,SUJ2,100Cr6,SAE52100,etcGB, DIN, JIS, ASTMSquare bar25*25mm to 140*140mmFlat barWidth:25mm~200mm Thick:3~ ...