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Equivalent steel grade1.1248,CK75,AISI1074,CS80,C75
2017-11-25 10:41:51

Equivalent steel grade1.1248,CK75,AISI1074,CS80,C75

CK75 steel similar to CK67 steel, the CK67 steel slightly less flexible, higher strength, lower hardenability, generally used in the quenched and tempered condition. For the manufacture of strength is not high, slightly smaller cross-sectional area of the coil spring, leaf springs, worn mechanical parts.
CK75 steel chemical composition: 
carbon (C) 0.72 to 0.80, manganese (Mn) 0.50 to 0.80, nickel (Ni) ≤ 0.30, silicon (Si) 0.17 to 0.37 phosphorus (P) ≤ 0.035, sulfur (S) (Cr) ≤ 0.25 Cu (Cu) ≤ 0.25
75 steel mechanical properties: tensile strength σb (MPa) ≥ 1080, yield strength σs (MPa) ≥ 880, elongation δ5 (%) ≥ 7, the reduction of area ψ (%) ≥ 30, hardness HBS: ≤ 285; annealed steel ≤ 241, the sample blank size: Sample heat treatment: 820 ℃ quenching, 840 ℃ tempering.

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