High quality hot rolled carbon steel round bar 1.Factory direct price 2.Small order&customsize 3.Fast delivery time High quality carbon steel hot rolled bar specificationOuter Diameter:3.5mm-300mmStandardGB,JIS,DIN,AISI,ASTMCertificateISO9001-2008 Material10#,20#,45#,Q195,Q235B ,SS400,ASTM A36,S235JR,St37-2,Q345B,S355JR,etc.ApplicationA) General service industries (petroleum, food, chemical, ...