Material Name: Alloy Steel
Grade: 45Cr
Standard: GB / T 3077-1988
● Chemical Composition:
Carbon C: 0.42 ~ 0.49
Si Si: 0.17 ~ 0.37
Manganese Mn: 0.50 ~ 0.80
Sulfur S: to allow the residual content of ≤ 0.035
Phosphorus P: allow the residual content ≤ 0.035
Chromium Cr: 0.80 ~ 1.10
Ni: to allow the residual content of ≤ 0.030
Copper Cu: to allow the residual content ≤ 0.030
● Mechanical Properties:
Tensile strength σb (MPa): ≥ 1030 (105)
Yield strength σs (MPa): ≥ 835 (85)
Elongation δ5 (%): ≥ 9
Reduction of area ψ (%): ≥ 40
Impact energy Akv (J): ≥ 39
Impact toughness αkv (J/cm2): ≥ 49 (5)
Hardness: ≤ 217HB
Sample size: Sample size is 25mm rough
● Heat treatment and microstructure specifications:
Standard heat treatment: quenching 840 ℃, oil cooling; tempering 520 ℃, water-cooled, oil-cooling.
● Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.