carbon steel SAE 1050 Grade:SAE1050,1.1210,S50C,50#,C50; Hardness:HB160-220 Anealing; Used for making mould buttom, carbon steel 1050 1) Grade:SAE 1050,1.1210,S50C,50#,C502) Hardness:HB160-220 Anealing 3) Chemical Compositions(%):C0.42~0.5Mo0.10(Max)Cr0.40(Max)Si0.15~0.4Mn0.5~0.8Ni0.40(Max)4) Usage:Used for making mould buttoms , plastic mould , normal mechinery parts and so on.