20Cr2Ni4A chemical composition and mechanical properties

    ● Chemical Composition:
Carbon C: 0.17 ~ 0.23
Silicon Si: 0.17 ~ 0.37
Manganese Mn: 0.30 ~ 0.60
Sulfur S: ≤ 0.03
Phosphorus P: ≤ 0.03
Chromium Cr: 1.25 ~ 1.65
Nickel Ni: 3.25 ~ 3.65
● mechanical properties:
Tensile strength σb (MPa): 1483
Conditions yield strength σ0.2 (MPa): 1292
Elongation δ5 (%): 13
Reduction of area ψ (%): 57
Impact toughness αkv (J/cm2): 75
Hardness: 434HB
Sample size: a sample
● Heat treatment and microstructure specifications:
Heat treatment specifications: +780 ℃ 880 ℃ oil quenching oil quenching, 200 ℃ tempering.
● Delivery status: to heat treatment (normalizing, annealing or high-temperature tempering) or without heat treatment delivery, the delivery status should be specified in the contract.