Specification 1.Medium carbon structural steel. 2.High strength and machinability. 3.Good toughness plasticity. 4.Nice abrasion resistance. 5.Typically used in quenched and tempered or normalized conditions. Application C Si Mn P s Cr Ni 0.42-0.50 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.30 Similar grade Gb aisi/astm Din Jis C45 1045 1.1191 S45c
