... 45#,40Cr,20#,20CrMnTi technique: hot rolled, forged carbon steel round bars,steel round bars Grade: 45# 45B S45C C45 CK45 ... XC45technique: hot rolled, forged DescriptionCarbon structure steel/carbon steel round bar/flat bar/carbon steel plate/sheetGradeGB Q255/JIS SS490/DIN S275J0/ ... mechinery parts,such as bolt,chain,pull rod,shape steel,steel plate,flat bar steel and so onPackaging We provide the ...