EN 10085 Grade 31CrMoV9 surface hardened

Want to keep this datasheet? Save it now in your required format

Description

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).

Related Standards

Equivalent Materials

This material data has been provided by WIAM.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

See where falls on the material property chart for against in your materials selection and design process. Our Ashby charts are interactive with more technical data upon clicking. Sign up to get access to this premium feature for free.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.83 - 7.85 g/cm³

Show Material materials with Density of 7.83 - 7.85 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

217 GPa

Show Material materials with Elastic modulus of 217 GPa

20.0 °C

210 - 212 GPa

Show Material materials with Elastic modulus of 210 - 212 GPa

100.0 °C

205 - 207 GPa

Show Material materials with Elastic modulus of 205 - 207 GPa

200.0 °C

195 - 199 GPa

Show Material materials with Elastic modulus of 195 - 199 GPa

300.0 °C

185 - 192 GPa

Show Material materials with Elastic modulus of 185 - 192 GPa

400.0 °C

175 - 184 GPa

Show Material materials with Elastic modulus of 175 - 184 GPa

500.0 °C

165 - 175 GPa

Show Material materials with Elastic modulus of 165 - 175 GPa

600.0 °C

155 - 164 GPa

Show Material materials with Elastic modulus of 155 - 164 GPa

Poisson's ratio

23.0 °C

0.3 [-]

Show Material materials with Poisson's ratio of 0.3 [-]

Typical for Steel

Shear modulus

20.0 °C

81 GPa

Show Material materials with Shear modulus of 81 GPa

Thermal

PropertyTemperatureValue

Coefficient of thermal expansion

-100.0 °C

1.05E-5 1/K

Show Material materials with Coefficient of thermal expansion of 1.05E-5 1/K

20.0 °C

1.15E-5 1/K

Show Material materials with Coefficient of thermal expansion of 1.15E-5 1/K

100.0 °C

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

Show Material materials with Coefficient of thermal expansion of 1.11E-5 - 1.21E-5 1/K

200.0 °C

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

Show Material materials with Coefficient of thermal expansion of 1.21E-5 - 1.27E-5 1/K

300.0 °C

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

Show Material materials with Coefficient of thermal expansion of 1.29E-5 - 1.32E-5 1/K

400.0 °C

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

Show Material materials with Coefficient of thermal expansion of 1.35E-5 - 1.36E-5 1/K

500.0 °C

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

Show Material materials with Coefficient of thermal expansion of 1.39E-5 - 1.4E-5 1/K

600.0 °C

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

Show Material materials with Coefficient of thermal expansion of 1.41E-5 - 1.44E-5 1/K

Unlock all property charts

Specific heat capacity

-100.0 °C

423 J/(kg·K)

Show Material materials with Specific heat capacity of 423 J/(kg·K)

20.0 °C

460 - 461 J/(kg·K)

Show Material materials with Specific heat capacity of 460 - 461 J/(kg·K)

100.0 °C

479 J/(kg·K)

Show Material materials with Specific heat capacity of 479 J/(kg·K)

200.0 °C

499 J/(kg·K)

Show Material materials with Specific heat capacity of 499 J/(kg·K)

300.0 °C

517 J/(kg·K)

Show Material materials with Specific heat capacity of 517 J/(kg·K)

400.0 °C

536 J/(kg·K)

Show Material materials with Specific heat capacity of 536 J/(kg·K)

500.0 °C

558 J/(kg·K)

Show Material materials with Specific heat capacity of 558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Show Material materials with Specific heat capacity of 587 J/(kg·K)

Unlock all property charts

Thermal conductivity

20.0 °C

25.7 - 36 W/(m·K)

Show Material materials with Thermal conductivity of 25.7 - 36 W/(m·K)

100.0 °C

27.4 - 36.5 W/(m·K)

Show Material materials with Thermal conductivity of 27.4 - 36.5 W/(m·K)

200.0 °C

28.5 - 37.3 W/(m·K)

Show Material materials with Thermal conductivity of 28.5 - 37.3 W/(m·K)

300.0 °C

28.9 - 36.5 W/(m·K)

Show Material materials with Thermal conductivity of 28.9 - 36.5 W/(m·K)

400.0 °C

28.5 - 34.8 W/(m·K)

Show Material materials with Thermal conductivity of 28.5 - 34.8 W/(m·K)

500.0 °C

27.7 - 33.5 W/(m·K)

Show Material materials with Thermal conductivity of 27.7 - 33.5 W/(m·K)

600.0 °C

26.8 W/(m·K)

Show Material materials with Thermal conductivity of 26.8 W/(m·K)

Unlock all property charts

Thermal diffusivity

20.0 °C

7.1 mm²/s

Show Material materials with Thermal diffusivity of 7.1 mm²/s

100.0 °C

7.1 mm²/s

Show Material materials with Thermal diffusivity of 7.1 mm²/s

200.0 °C

6.9 mm²/s

Show Material materials with Thermal diffusivity of 6.9 mm²/s

300.0 °C

6.6 mm²/s

Show Material materials with Thermal diffusivity of 6.6 mm²/s

400.0 °C

6.1 mm²/s

Show Material materials with Thermal diffusivity of 6.1 mm²/s

500.0 °C

5.3 mm²/s

Show Material materials with Thermal diffusivity of 5.3 mm²/s

600.0 °C

4.5 mm²/s

Show Material materials with Thermal diffusivity of 4.5 mm²/s

Unlock all property charts

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.8E-7 - 4.05E-7 Ω·m

Show Material materials with Electrical resistivity of 1.8E-7 - 4.05E-7 Ω·m

100.0 °C

4.67E-7 Ω·m

Show Material materials with Electrical resistivity of 4.67E-7 Ω·m

200.0 °C

5.53E-7 Ω·m

Show Material materials with Electrical resistivity of 5.53E-7 Ω·m

300.0 °C

6.5E-7 Ω·m

Show Material materials with Electrical resistivity of 6.5E-7 Ω·m

400.0 °C

7.62E-7 Ω·m

Show Material materials with Electrical resistivity of 7.62E-7 Ω·m

500.0 °C

8.92E-7 Ω·m

Show Material materials with Electrical resistivity of 8.92E-7 Ω·m

600.0 °C

1.03E-6 Ω·m

Show Material materials with Electrical resistivity of 1.03E-6 Ω·m

Unlock all property charts

Chemical properties

PropertyValue

Carbon

0.26 - 0.34 %

Show Material materials with Carbon of 0.26 - 0.34 %

Chromium

2.3 - 2.7 %

Show Material materials with Chromium of 2.3 - 2.7 %

Manganese

0.4 - 0.7 %

Show Material materials with Manganese of 0.4 - 0.7 %

Molybdenum

0.15 - 0.25 %

Show Material materials with Molybdenum of 0.15 - 0.25 %

Phosphorus

0.03 %

Show Material materials with Phosphorus of 0.03 %

Silicon

0.4 %

Show Material materials with Silicon of 0.4 %

Sulfur

0.03 %

Show Material materials with Sulfur of 0.03 %

Vanadium

0.1 - 0.2 %

Show Material materials with Vanadium of 0.1 - 0.2 %