C45 carbon steel properties and equivalent grades

Chemical composition of C45 carbon steel:
Carbon C: 0.42 - 0.50, silicon Si: ≤ 0.40, manganese Mn: 0.50 - 0.80, sulfur S: ≤ 0.045, phosphorus P: ≤ 0.045, chromium Cr: ≤ 0.40, nickel Ni: ≤ 0.40, molybdenum Mo: ≤ 0.10.

Mechanical properties of C45 carbon steel:
Tensile strength σ B (MPa): ≥ 600 (61), yield strength σ S (MPa): ≥ 355 (36), elongation δ 5 (%): ≥ 16, reduction of area ψ (%): ≥ 40, impact energy Akv (J): ≥ 39, impact toughness value α Kv (J/cm2): ≥ 49 (5), hardness: no heat treatment, ≤ 229HB; Annealed steel, ≤ 197HB.
Sample size: 25 mm.

Heat treatment: normalizing, 850 ℃; Quenching, 840 ℃; Tempering, 600 ℃.

Application scope of C45 steel: widely used in aerospace, electric power, petrochemical, shipbuilding, machinery, electronics, environmental protection and other industries.

C45 carbon steel equivalent grade:
Chinese GB standard steel grade 45; Japanese JIS standard steel grade S45C/S48C; German DIN standard material steel grade 1.0503; German DIN standard steel grade C45; British BS standard steel grade IC45/080A47; French AFNOR standard steel grade CC45; French NF standard steel grade C45; Italy UNI standard steel grade C45; Belgium NBN standard steel grade C45-1; Sweden SS standard steel grade 1650; Spanish standard steel grade F 114； American AISI/SAE standard steel grade 1045; ISO standard steel grade C45E4.