... steel. Size:150 x 150 to 550 x 550 Forged square bars SCM415Similar grade:20CrMo,SCM420,Size:150 x 150 to 600 ... ,SCM420,SCM435,SCM415,SNCM220,SNCM439,SACM 645;Tool Steel:SKD61.Materials were supply to Korea,Europe,Taiwan,and other Area. Forged square bars SCM415