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 31CrMo12 – High-Performance Quenched & Tempered Steel for Heavy‑Duty Applications

The nitriding steel 31 CrMo 12 can undergo quenchhardening and is used for heavy machine parts that are subjected to wear, have a high surface hardness and have a dimension of up to 250 mm. With parts for hot steam fittings such as valve spindles, it is used for dimensions of up to 100 mm and under highest pressure, the same with grinder valves and milling machine spindles. 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

184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Elongation

20.0 °C

11 - 12 %

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Steel

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

1.1E-5 - 1.21E-5 1/K

200.0 °C

1.2E-5 - 1.27E-5 1/K

300.0 °C

1.3E-5 - 1.32E-5 1/K

400.0 °C

1.36E-5 - 1.4E-5 1/K

500.0 °C

1.4E-5 1/K

600.0 °C

1.44E-5 1/K

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

440 - 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 W/(m·K)

200.0 °C

28.5 W/(m·K)

300.0 °C

28.9 W/(m·K)

400.0 °C

28.5 W/(m·K)

500.0 °C

27.7 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

0.28 - 0.35 %

Chromium

2.8 - 3.3 %

Manganese

0.4 - 0.7 %

Molybdenum

0.3 - 0.5 %

Nickel

0.3 %

Phosphorus

0.03 %

Silicon

0.4 %

Sulfur

0.03 %


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 10216-2 Grade 11CrMo9-10 Quenched & Tempered Seamless Tubes – High‑Temperature, High‑Pressure Applications
    7. EN 10132-3: 42CrMo4 Quenched & Tempered Alloy Steel – Premium Cold-Rolled Strips
    8. EN 10085 Grade 31CrMoV9 Steel – Quenched & Tempered (QT) for High‑Performance Applications
    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