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EN 10269 X6CrNiMoB17-12-2 Solution-Annealed Steel (+AT): High-Temperature Austenitic Steel for Power Plants & Chemical Applications

Unstabilized austenitic high-temperature steel with good thermal resistance up to 700 °C for application in power station engineering (sodium-cooled fast breeder, pressure vessels, fittings, pipelines), in chemical industry as well as for superheater tubes and turbine lines. Further application for mounting elements at increased temperatures.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.98 - 8 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

206 GPa

20.0 °C

196 - 198 GPa

100.0 °C

190 - 192 GPa

200.0 °C

182 - 183 GPa

300.0 °C

174 - 175 GPa

400.0 °C

166 - 167 GPa

500.0 °C

158 - 159 GPa

600.0 °C

150 GPa

700.0 °C

142 GPa

800.0 °C

134 GPa

900.0 °C

127 GPa

1000.0 °C

120 GPa

Elongation

20.0 °C

35 %

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Austenitic Stainless Steel

Shear modulus

23.0 °C

77 GPa

Typical for Austenitic Stainless Steel

Tensile strength

20.0 °C

490 - 690 MPa

50.0 °C

490 MPa

100.0 °C

460 MPa

150.0 °C

440 MPa

200.0 °C

420 MPa

250.0 °C

415 MPa

300.0 °C

410 MPa

350.0 °C

410 MPa

400.0 °C

410 MPa

450.0 °C

405 MPa

500.0 °C

390 MPa

550.0 °C

375 MPa

600.0 °C

350 MPa

Yield strength Rp0.2

20.0 °C

205 MPa

50.0 °C

194 MPa

100.0 °C

177 MPa

150.0 °C

162 MPa

200.0 °C

147 MPa

250.0 °C

137 MPa

300.0 °C

127 MPa

350.0 °C

122 MPa

400.0 °C

118 MPa

450.0 °C

113 MPa

500.0 °C

108 MPa

550.0 °C

103 MPa

600.0 °C

98 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.49E-5 1/K

20.0 °C

1.61E-5 1/K

100.0 °C

1.63E-5 - 1.67E-5 1/K

200.0 °C

1.68E-5 - 1.72E-5 1/K

300.0 °C

1.73E-5 - 1.77E-5 1/K

400.0 °C

1.76E-5 - 1.81E-5 1/K

500.0 °C

1.82E-5 - 1.84E-5 1/K

600.0 °C

1.85E-5 - 1.88E-5 1/K

700.0 °C

1.91E-5 1/K

800.0 °C

1.94E-5 1/K

900.0 °C

1.97E-5 1/K

1000.0 °C

2E-5 1/K

Max service temperature, long

0 - 700 °C

Melting point

1230 - 1480 °C

Typical for Austenitic Stainless Steel

Specific heat capacity

-100.0 °C

440 J/(kg·K)

20.0 °C

450 - 472 J/(kg·K)

100.0 °C

487 J/(kg·K)

200.0 °C

503 J/(kg·K)

300.0 °C

512 J/(kg·K)

400.0 °C

520 J/(kg·K)

500.0 °C

530 J/(kg·K)

600.0 °C

541 J/(kg·K)

700.0 °C

551 J/(kg·K)

800.0 °C

559 J/(kg·K)

900.0 °C

565 J/(kg·K)

1000.0 °C

571 J/(kg·K)

Thermal conductivity

20.0 °C

13.5 - 16 W/(m·K)

100.0 °C

15 W/(m·K)

200.0 °C

16.7 W/(m·K)

300.0 °C

18.3 W/(m·K)

400.0 °C

19.8 W/(m·K)

500.0 °C

21.2 W/(m·K)

600.0 °C

22.7 W/(m·K)

700.0 °C

24.1 W/(m·K)

800.0 °C

25.5 W/(m·K)

900.0 °C

26.9 W/(m·K)

1000.0 °C

28.3 W/(m·K)

Thermal diffusivity

20.0 °C

3.6 mm²/s

100.0 °C

3.8 mm²/s

200.0 °C

4 mm²/s

300.0 °C

4.4 mm²/s

400.0 °C

4.6 mm²/s

500.0 °C

4.7 mm²/s

600.0 °C

4.9 mm²/s

700.0 °C

5.2 mm²/s

800.0 °C

5.5 mm²/s

900.0 °C

5.8 mm²/s

1000.0 °C

5.9 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

7.1E-7 - 7.7E-7 Ω·m

100.0 °C

8.34E-7 Ω·m

200.0 °C

9.03E-7 Ω·m

300.0 °C

9.64E-7 Ω·m

400.0 °C

1.02E-6 Ω·m

500.0 °C

1.06E-6 Ω·m

600.0 °C

1.1E-6 Ω·m

700.0 °C

1.13E-6 Ω·m

800.0 °C

1.17E-6 Ω·m

900.0 °C

1.19E-6 Ω·m

1000.0 °C

1.22E-6 Ω·m

Chemical properties

PropertyValue

Boron

1.5E-3 - 5E-3 %

Carbon

0.04 - 0.08 %

Chromium

16.5 - 18.5 %

Manganese

2 %

Molybdenum

2 - 2.5 %

Nickel

10 - 13 %

Nitrogen

0.1 - 0.11 %

Phosphorus

0.04 %

Silicon

1 %

Sulfur

0.015 %


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