... rolled carbon round steel(Q235 Q235B Q345 Q345B ASTM A36 SS400 S275JR S235JR SS355.....manufacture)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 ...