... . Carbon steel and alloy steel Rounds and Squares and Flats. Good price and high quality Hot Forged steel round barSteel grade:Carbon steel:Chinese Standard ... ;Europe Standard:CK15,C.22,C45,CK45,C60,CK60;C45E;Alloy Steel:Chinese Standad:16Mn,20Mn,30Mn2,30Mn5,40Cr,Q345D,Q345E,Q390 ... C/c,D/d,E/e;As forged condition straightness: ≤4mm/m, RT bar straightness: ≤2mm/mAs forged diameter tolerance: -0 ...