DIN 17240 Grade X8CrNiMoBNb16-16 hot work-hardened and age hardened

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Description

Hardenable austenitic high temperature steel with addition of B to increase high temperature strength, the creep behaviour and the neutrons absorption. High temperature strength up to 650 °C, resistance to scaling up to 750 °C. Application: for nuts and screws, steam and gas turbines, in the chemicals industry for high loaded parts like screws, shafts, spindles, valves and in the reactor manufacturing

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

7.97 - 8.01 g/cm³

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Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

206 GPa

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20.0 °C

196 - 197.57 GPa

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100.0 °C

190 - 192 GPa

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200.0 °C

182 - 186 GPa

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300.0 °C

174 - 181 GPa

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400.0 °C

166 - 174 GPa

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500.0 °C

158 - 165 GPa

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600.0 °C

150 - 157 GPa

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700.0 °C

142 - 147 GPa

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800.0 °C

134 GPa

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Elongation

20.0 °C

16 %

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Poisson's ratio

20.0 °C

0.28 [-]

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Reduction of area

20.0 °C

40 %

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Shear modulus

20.0 °C

77.3 GPa

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Tensile strength

20.0 °C

650 - 850 MPa

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Yield strength Rp0.2

20.0 °C

500 MPa

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200.0 °C

432 MPa

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250.0 °C

412 MPa

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300.0 °C

393 MPa

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350.0 °C

372 MPa

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400.0 °C

353 MPa

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450.0 °C

334 MPa

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500.0 °C

314 MPa

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550.0 °C

284 MPa

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600.0 °C

255 MPa

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650.0 °C

206 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.49E-5 1/K

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20.0 °C

1.61E-5 1/K

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100.0 °C

1.67E-5 - 1.76E-5 1/K

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200.0 °C

1.72E-5 - 1.77E-5 1/K

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300.0 °C

1.77E-5 - 1.79E-5 1/K

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400.0 °C

1.79E-5 - 1.81E-5 1/K

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500.0 °C

1.79E-5 - 1.84E-5 1/K

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600.0 °C

1.81E-5 - 1.88E-5 1/K

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700.0 °C

1.83E-5 - 1.91E-5 1/K

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800.0 °C

1.86E-5 - 1.94E-5 1/K

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900.0 °C

1.97E-5 1/K

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1000.0 °C

2E-5 1/K

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Max service temperature, long

0 - 750 °C

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Melting point

1230 - 1480 °C

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Typical for Austenitic Stainless Steel

Specific heat capacity

-100.0 °C

440 J/(kg·K)

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20.0 °C

460 - 472 J/(kg·K)

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100.0 °C

487 J/(kg·K)

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200.0 °C

503 J/(kg·K)

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300.0 °C

512 J/(kg·K)

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400.0 °C

520 J/(kg·K)

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500.0 °C

530 J/(kg·K)

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600.0 °C

541 J/(kg·K)

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700.0 °C

551 J/(kg·K)

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800.0 °C

559 J/(kg·K)

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900.0 °C

565 J/(kg·K)

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1000.0 °C

571 J/(kg·K)

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Thermal conductivity

20.0 °C

13.5 - 15 W/(m·K)

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100.0 °C

14.9 - 20 W/(m·K)

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200.0 °C

16.7 - 20 W/(m·K)

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300.0 °C

18.3 - 19 W/(m·K)

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400.0 °C

19 - 19.8 W/(m·K)

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500.0 °C

21 - 21.3 W/(m·K)

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600.0 °C

22 - 22.7 W/(m·K)

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700.0 °C

24 - 24.2 W/(m·K)

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800.0 °C

25 - 25.6 W/(m·K)

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Thermal diffusivity

20.0 °C

3.6 mm²/s

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100.0 °C

3.7 mm²/s

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200.0 °C

4 mm²/s

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300.0 °C

4.4 mm²/s

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400.0 °C

4.6 mm²/s

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500.0 °C

4.7 mm²/s

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600.0 °C

4.9 mm²/s

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700.0 °C

5.2 mm²/s

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800.0 °C

5.5 mm²/s

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Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

7.75E-7 - 8.5E-7 Ω·m

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100.0 °C

8.42E-7 Ω·m

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200.0 °C

9.04E-7 Ω·m

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300.0 °C

9.62E-7 Ω·m

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400.0 °C

1.01E-6 Ω·m

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500.0 °C

1.06E-6 Ω·m

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600.0 °C

1.1E-6 Ω·m

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700.0 °C

1.13E-6 Ω·m

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800.0 °C

1.16E-6 Ω·m

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Chemical properties

PropertyValue

Carbon

0.04 - 0.1 %

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Chromium

15.5 - 17.5 %

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Manganese

1.5 %

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Molybdenum

1.6 - 2 %

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Nickel

15.5 - 17.5 %

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Phosphorus

0.05 %

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Silicon

0.3 - 0.6 %

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Sulfur

0.03 %

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