Special steel bars, Size:90-800mm Black surface and Rough turned bars. Hot forged steel round bar.Grade:ASTM A350LF2Similar steel grade:S355J2G3,16Mn,ST52-3NChemical ... Steel: ST52-3,ASTM A105,42CrMo4,S355J2G3, 16MnCr5,20MnCr5,34CrNiMo6,18CrNiMo7-6,39CrNiMo3, 17CrNiMo6,21CrMoV511,56NiCrMoV7, SS355J2Manufacturer:Jiangsu Zhuhong Forging Co.,Ltd. Special steel ...