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EN 10088-1 Grade X7CrNiAl17-7: Solution-Annealed Stainless Steel with Enhanced Performance

Material X7CrNiAl17-7 is comparable to X 7 CrNiAl 17 7 acc. to DIN17224 : 1982-02. The material is a hardenable stainless steel with high strength and hardness, sufficient corrosion resistance and satisfactory workability. It shows the lowest corrosion resistance within the group of type 1.4301 owing to the lowered Cr- and Ni-content and the Al-addition. Application in aircraft industry and in leight weight construction for surface facings, fuel reservoirs, valve components, pressure vessels, presswork components in wear loaded assemblies.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.8 - 7.92 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

206 GPa

20.0 °C

196 - 200 GPa

100.0 °C

190 - 195 GPa

200.0 °C

182 - 185 GPa

300.0 °C

174 - 175 GPa

400.0 °C

166 - 170 GPa

500.0 °C

158 GPa

600.0 °C

150 GPa

700.0 °C

142 GPa

800.0 °C

134 GPa

Elongation

20.0 °C

10 - 19 %

Elongation A80

20.0 °C

19 %

Elongation A80, transverse

20.0 °C

19 %

Hardness, Brinell

20.0 °C

255 [-]

Poisson's ratio

20.0 °C

0.28 [-]

Tensile strength

20.0 °C

100 - 1100 MPa

Tensile strength, transverse

20.0 °C

1030 MPa

Thermal

PropertyTemperatureValue

Coefficient of thermal expansion

-100.0 °C

1.49E-5 1/K

20.0 °C

1.61E-5 1/K

100.0 °C

1.3E-5 - 1.67E-5 1/K

200.0 °C

1.35E-5 - 1.72E-5 1/K

300.0 °C

1.4E-5 - 1.77E-5 1/K

400.0 °C

1.81E-5 1/K

500.0 °C

1.84E-5 1/K

600.0 °C

1.88E-5 1/K

700.0 °C

1.91E-5 1/K

800.0 °C

1.94E-5 1/K

Specific heat capacity

-100.0 °C

440 J/(kg·K)

20.0 °C

472 - 500 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)

Thermal conductivity

-100.0 °C

11.7 W/(m·K)

20.0 °C

14.5 - 16 W/(m·K)

100.0 °C

16 W/(m·K)

200.0 °C

17.6 W/(m·K)

300.0 °C

19.1 W/(m·K)

400.0 °C

20.4 W/(m·K)

500.0 °C

21.9 W/(m·K)

600.0 °C

23.3 W/(m·K)

700.0 °C

24.7 W/(m·K)

800.0 °C

26.1 W/(m·K)

Thermal diffusivity

-100.0 °C

3.7 mm²/s

20.0 °C

3.9 mm²/s

100.0 °C

4.3 mm²/s

200.0 °C

4.3 mm²/s

300.0 °C

4.6 mm²/s

400.0 °C

4.7 mm²/s

500.0 °C

4.9 mm²/s

600.0 °C

5 mm²/s

700.0 °C

5.3 mm²/s

800.0 °C

5.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

-100.0 °C

5.86E-7 Ω·m

20.0 °C

6.92E-7 - 8E-7 Ω·m

100.0 °C

7.58E-7 Ω·m

200.0 °C

8.36E-7 Ω·m

300.0 °C

9.07E-7 Ω·m

400.0 °C

9.73E-7 Ω·m

500.0 °C

1.02E-6 Ω·m

600.0 °C

1.06E-6 Ω·m

700.0 °C

1.1E-6 Ω·m

800.0 °C

1.13E-6 Ω·m

Chemical properties

PropertyValue

Aluminium

0.7 - 1.5 %

Carbon

0.09 %

Chromium

16 - 18 %

Manganese

1 %

Nickel

6.5 - 7.8 %

Phosphorus

0.04 %

Silicon

0.7 %

Sulfur

0.015 %


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