The 50Mn Chemical composition and mechanical properties

Chemical Composition

Carbon C: 0.48 ~ 0.56
Silicon Si: 0.17 ~ 0.37
Manganese Mn: 0.70 ~ 1.00
Sulfur S: ≤ 0.035
Phosphorus P: ≤ 0.035
Chromium Cr: ≤ 0.25
Nickel Ni: ≤ 0.30
Copper Cu: ≤ 0.25

Mechanical Properties

Tensile strength σb (MPa): ≥ 645 (66)
Yield strength σs (MPa): ≥ 390 (40)
Elongation δ5 (%): ≥ 13
Reduction of area ψ (%): ≥ 40
Impact energy Akv (J): ≥ 31
Impact toughness value of alpha kv (J/cm2): ≥ 39 (4)