Detailed Product Description 1--Garde: SAE1045, S45C, etc2--Hardness:HB160-220 Anealing3--Thickness available for plates 10--340mm, cutted any sizes upon customer requestments4--Chemical compositions(%) C 0.42-0.5 Mo 0.10 Cr 0.40 Si 0.15-0.4 Mn 0.5-0.8 Ni 0.405--Usage: used for making mould buttons, plstic mould, normal mechinery parts and so on.