EN 10085 Grade 34CrAlMo5 quenched and tempered (+QT)

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Description

The nitriding steel 34 CrAlMo 5 can undergo quenchhardening and is used for parts of hot steam fittings that have a high fatigue strength at temperatures from 350 to 500 degrees C. Suitable for dimensions of up to 80 mm. Construction components: valve spindles and plates. Further use: plunger pistons, piston rods, spindles in grinders and milling machines, measuring equipment. 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). The steel with an increased Al-content is susceptible to increased decarbonization. The forging requires sufficient additives for processing so that the finished construction component can undergo the nitriding process without decarburization.

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.

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Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.83 g/cm³

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Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

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20.0 °C

212 GPa

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100.0 °C

207 GPa

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200.0 °C

199 GPa

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300.0 °C

192 GPa

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400.0 °C

184 GPa

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500.0 °C

175 GPa

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600.0 °C

164 GPa

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Elongation

20.0 °C

14 %

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Poisson's ratio

20.0 °C

0.28 [-]

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Tensile strength

20.0 °C

800 - 1000 MPa

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Yield strength

20.0 °C

600 MPa

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Thermal

PropertyTemperatureValue

Coefficient of thermal expansion

-100.0 °C

1.05E-5 1/K

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20.0 °C

1.15E-5 1/K

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100.0 °C

1.21E-5 1/K

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200.0 °C

1.27E-5 1/K

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300.0 °C

1.32E-5 1/K

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400.0 °C

1.36E-5 1/K

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500.0 °C

1.4E-5 1/K

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600.0 °C

1.44E-5 1/K

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Max service temperature, long

350 - 500 °C

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Specific heat capacity

-100.0 °C

423 J/(kg·K)

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20.0 °C

461 J/(kg·K)

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100.0 °C

479 J/(kg·K)

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200.0 °C

499 J/(kg·K)

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300.0 °C

517 J/(kg·K)

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400.0 °C

536 J/(kg·K)

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500.0 °C

558 J/(kg·K)

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600.0 °C

587 J/(kg·K)

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Thermal conductivity

20.0 °C

45.1 W/(m·K)

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100.0 °C

45.1 W/(m·K)

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200.0 °C

44.1 W/(m·K)

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300.0 °C

41.9 W/(m·K)

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400.0 °C

39.4 W/(m·K)

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500.0 °C

36.9 W/(m·K)

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600.0 °C

34.4 W/(m·K)

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Thermal diffusivity

20.0 °C

12.5 mm²/s

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100.0 °C

11.6 mm²/s

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200.0 °C

10.6 mm²/s

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300.0 °C

9.5 mm²/s

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400.0 °C

8.4 mm²/s

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500.0 °C

7.1 mm²/s

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600.0 °C

5.8 mm²/s

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Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

2.31E-7 Ω·m

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100.0 °C

2.84E-7 Ω·m

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200.0 °C

3.58E-7 Ω·m

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300.0 °C

4.48E-7 Ω·m

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400.0 °C

5.52E-7 Ω·m

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500.0 °C

6.71E-7 Ω·m

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600.0 °C

8.06E-7 Ω·m

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Chemical properties

PropertyValue

Aluminium

0.8 - 1.2 %

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Carbon

0.3 - 0.37 %

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Chromium

1 - 1.3 %

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Manganese

0.5 - 0.8 %

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Molybdenum

0.15 - 0.25 %

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Phosphorus

0.03 %

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Silicon

0.4 %

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Sulfur

0.03 %

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