... C45 CK45 Cm45 AIIS1045 SAE1045 ASTM1045 XC45 carbon structural steel high quality Grade: 45# 45B S45C C45 CK45 Cm45 AIIS1045 SAE1045 ... party inspection institution:CIQ,SGS,ITS,BV,etc)Delivery StateHot forged,Black&AnnealingHardnessHBS=137~269Characteristic Applicationwelding is well,Used for ... making normal mechinery parts,such as bolt,chain,pull rod,shape steel,steel plate,flat bar steel ...