... length;Dia. tolerance ;-0/+3mm.straightness: max. 2mm/m.Other steel grade; Carbon Steel:S20C,S26C,S35C,S45C,S50C,S55C,S60C;Alloy ... ,SCM420,SCM435,SCM415,SNCM220,SNCM439,SACM 645;Tool Steel:SKD61.Mill:Jiangsu Zhuhong Forging Co.,Ltd. Forged Round bars ...