home Manufacturing Technology Manufacturing Equipment
Industrial manufacturing
Industrial Internet of Things | Industrial materials | Equipment Maintenance and Repair | Industrial programming |
home  MfgRobots >> Industrial manufacturing >  >> Industrial materials >> Metal

EN 10085 Grade 31CrMoV9 Steel – Quenched & Tempered (QT) for High‑Performance Applications

The nitriding steel 31 CrMoV 9 can undergo quenchhardening and is used for parts for hot steam fittings, valve spindles, crank shafts, and similarly stressed wear parts that have a dimension of up to 100 mm. The steel contains a nitride agent (Cr) which contributes through the nitriding process or the nitro-carburization process with N or N and C to a higher: - case hardness - abrasion resistance - fatigue strength and - corrosion resistance. It is used for forged construction components: quench-hardened, mechanically processed and treated thermo-chemically (for example nitriding).

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.83 - 7.85 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

210 - 212 GPa

100.0 °C

205 - 207 GPa

200.0 °C

195 - 199 GPa

300.0 °C

185 - 192 GPa

400.0 °C

175 - 184 GPa

500.0 °C

165 - 175 GPa

600.0 °C

155 - 164 GPa

Elongation

20.0 °C

11 - 12 %

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Steel

Shear modulus

20.0 °C

81 GPa

Tensile strength

20.0 °C

900 - 1200 MPa

Yield strength

20.0 °C

700 - 800 MPa

Thermal

PropertyTemperatureValue

Coefficient of thermal expansion

-100.0 °C

1.05E-5 1/K

20.0 °C

1.15E-5 1/K

100.0 °C

1.11E-5 - 1.21E-5 1/K

200.0 °C

1.21E-5 - 1.27E-5 1/K

300.0 °C

1.29E-5 - 1.32E-5 1/K

400.0 °C

1.35E-5 - 1.36E-5 1/K

500.0 °C

1.39E-5 - 1.4E-5 1/K

600.0 °C

1.41E-5 - 1.44E-5 1/K

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

460 - 461 J/(kg·K)

100.0 °C

479 J/(kg·K)

200.0 °C

499 J/(kg·K)

300.0 °C

517 J/(kg·K)

400.0 °C

536 J/(kg·K)

500.0 °C

558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Thermal conductivity

20.0 °C

25.7 - 36 W/(m·K)

100.0 °C

27.4 - 36.5 W/(m·K)

200.0 °C

28.5 - 37.3 W/(m·K)

300.0 °C

28.9 - 36.5 W/(m·K)

400.0 °C

28.5 - 34.8 W/(m·K)

500.0 °C

27.7 - 33.5 W/(m·K)

600.0 °C

26.8 W/(m·K)

Thermal diffusivity

20.0 °C

7.1 mm²/s

100.0 °C

7.1 mm²/s

200.0 °C

6.9 mm²/s

300.0 °C

6.6 mm²/s

400.0 °C

6.1 mm²/s

500.0 °C

5.3 mm²/s

600.0 °C

4.5 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.8E-7 - 4.05E-7 Ω·m

100.0 °C

4.67E-7 Ω·m

200.0 °C

5.53E-7 Ω·m

300.0 °C

6.5E-7 Ω·m

400.0 °C

7.62E-7 Ω·m

500.0 °C

8.92E-7 Ω·m

600.0 °C

1.03E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.26 - 0.34 %

Chromium

2.3 - 2.7 %

Manganese

0.4 - 0.7 %

Molybdenum

0.15 - 0.25 %

Phosphorus

0.03 %

Silicon

0.4 %

Sulfur

0.03 %

Vanadium

0.1 - 0.2 %


Metal

  • Metal
  • Resin
  • fiber
  • Composite material
  • Nanomaterials
  • Polymer Materials
  • Biologics
  • Dye
  • Spices
    1. EN 10137-2 Grade S890QL – High-Strength Quenched & Tempered Steel for Heavy-Duty Applications
    2. EN 10137-3 Grade S500A: Quenched & Tempered Fine‑Grained Steel for Structural Applications
    3. EN 10083-1 Grade 51CrV4: Quenched & Tempered Steel (QT)
    4. EN 10213 Grade G17CrMo9-10 – Quenched & Tempered (QT) Steel for High-Temperature Applications
    5. EN 10085 Grade 15 CrMoV 5.9: Quenched & Tempered Steel for Durable Machine Components
    6. EN 10085 Grade 31CrMo12 – High-Performance Quenched & Tempered Steel for Heavy‑Duty Applications
    7. EN 10216-2 Grade 11CrMo9-10 Quenched & Tempered Seamless Tubes – High‑Temperature, High‑Pressure Applications
    8. EN 10132-3: 42CrMo4 Quenched & Tempered Alloy Steel – Premium Cold-Rolled Strips
    9. EN 10085 Grade 34CrAlMo5 – Quenched & Tempered Steel for High‑Temperature Applications
    10. EN 10085 Grade 34 CrAlNi 7 – Quenched & Tempered Steel for Heavy Machinery