The 25Mn Chemical composition and mechanical properties

● Chemical Composition:
Carbon C: 0.22 ~ 0.29
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

25Mn performance:
Tensile strength σb (MPa): ≥ 490 (50)
Yield strength σs (MPa): ≥ 295 (30)
Elongation δ5 (%): ≥ 22
Reduction of area ψ (%): ≥ 50
Impact energy Aku2 (J): ≥ 71
Impact toughness value of alpha kv (J/cm2): ≥ 88 (9)
Hardness: Steel the delivery status hardness HBS 10/3000 no heat treatment ≤ 207HB
Sample size: Sample size is 25mm
The heat treatment process: 900 ° C normalizing, quenching at 870 ℃ and 600 ℃ tempering.