... round barSpecifications:C45, S20C, S26C, S55C, S60C, S355J2G3, ST52-3, 16MnCr5, 20MnCr5, A350 LF2,A105, Q390, SCM415, SCM435, ... E/e;As forged condition straightness: ≤4mm/m, RT bar straightness: ≤2mm/mAs forged diameter tolerance: -0/+8mm ... ; RT diameter tolerance:-0/+3 mmGrain size: as per ASTM E112-96 Grade ... Forging Co.,Ltd. Steel round forgings bar ST52-3/ A350 LF2/ A105