4Cr5MoSiV1 chemical composition and performance

Chemical composition
4Cr5MoSiV1 chemical composition%:
Carbon C: 0.32 ~ 0.45
Silicon Si: 0.80 ~ 1.20
Manganese Mn: 0.20 ~ 0.50
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.030
Chromium Cr: 4.75 ~ 5.50
Ni: to allow the residual content of ≤ 0.25
Cu: to allow the residual content of ≤ 0.30
Vanadium V: 0.80 ~ 1.20
Mo Mo: 1.10 ~ 1.75
Performance
● physical performance:
The density 7.8t/m3; elastic modulus E 210000MPa.
4Cr5MoSiV1 steel critical temperature
Critical temperature (approximate) / ° C
Ac1 860
Ac3 915
Ar1 775
Ar3 815
Ms 340
Mf 215
4Cr5MoSiV1 steel line expansion coefficient (expansion)
Expansion coefficient of the temperature / ℃ line (swelling) / ° C -1
20 ~ 100 9.1 × 10-6
20 ~ 200 10.3 × 10-6
20 ~ 300 11.5 × 10-6
20 ~ 400 12.2 × 10-6
20 ~ 500 12.8 × 10-6
20 ~ 600 13.2 × 10-6
20 ~ 700 13.5 × 10-6
The thermal conductivity of the 4Cr5MoSiV1 steel
Temperature / ℃ thermal conductivity λ / W · (m · K) -1
25 32.2
650 28.8
● mechanical properties:
Hardness: annealing, ≤ 235HB, indentation diameter ≥ 3.95mm