EN 10090 Grade X50CrMnNiNbN21-9 solution heat-treated and precipitation hardened (+AT+P)

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Description

X50CrMnNiNbN21-9 is a Cr-Mn-Ni-W-Nb-N-alloyed valve steel. The steel shows sufficient corrosion resistance in exhaust condensate and very good resistance to lead compounds at increased temperatures. Use: inlet valves (extremely loaded), exhaust valves (high-loaded)

Related Standards

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

7.8 g/cm³

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Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

205 GPa

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Elongation

20.0 °C

12 %

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Hardness, Rockwell C

20.0 °C

30 [-]

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Poisson's ratio

23.0 °C

0.3 [-]

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Typical for Austenitic Stainless Steel

Reduction of area

20.0 °C

15 %

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Shear modulus

23.0 °C

77 GPa

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Typical for Austenitic Stainless Steel

Tensile strength

20.0 °C

950 - 1150 MPa

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500.0 °C

680 MPa

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550.0 °C

650 MPa

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600.0 °C

610 MPa

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650.0 °C

550 MPa

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700.0 °C

480 MPa

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750.0 °C

410 MPa

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800.0 °C

340 MPa

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Yield strength Rp0.2

20.0 °C

580 MPa

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500.0 °C

350 MPa

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550.0 °C

330 MPa

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600.0 °C

310 MPa

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650.0 °C

280 MPa

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700.0 °C

260 MPa

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750.0 °C

235 MPa

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800.0 °C

220 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.55E-5 1/K

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300.0 °C

1.75E-5 1/K

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500.0 °C

1.85E-5 1/K

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700.0 °C

1.88E-5 1/K

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Melting point

1230 - 1480 °C

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Typical for Austenitic Stainless Steel

Specific heat capacity

20.0 °C

500 J/(kg·K)

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Thermal conductivity

20.0 °C

14.5 W/(m·K)

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Electrical

PropertyTemperatureValueComment

Electrical resistivity

23.0 °C

8.5E-7 Ω·m

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Typical for Austenitic Stainless Steel

Chemical properties

PropertyValue

Carbon

0.45 - 0.55 %

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Chromium

20 - 22 %

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Manganese

8 - 10 %

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Nickel

3.5 - 5.5 %

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Nitrogen

0.4 - 0.6 %

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Phosphorus

0.05 %

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Silicon

0.45 %

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Sulfur

0.03 %

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Tungsten

0.8 - 1.5 %

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