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EN 10270-3 Grade X7CrNiAl17-7: Premium Cold-Drawn Stainless Steel Wire

The stainless steel X7CrNiAl17-7 is usually used cold drawn as wire up to 10 mm diameter for springs or spring parts. It has a high fatigue strength and a raised high-temperature strength, but a reduced corrosion resistance and is applicable up to 300°C.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.92 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

206 GPa

20.0 °C

190 - 200 GPa

100.0 °C

190 GPa

200.0 °C

182 GPa

300.0 °C

174 GPa

400.0 °C

166 GPa

500.0 °C

158 GPa

600.0 °C

150 GPa

700.0 °C

142 GPa

800.0 °C

134 GPa

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Steel

Shear modulus

20.0 °C

73 - 78 GPa

Tensile strength

20.0 °C

1250 - 2280 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

1.67E-5 1/K

200.0 °C

1.72E-5 1/K

300.0 °C

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

Max service temperature, long

-150 - 350 °C

Specific heat capacity

-100.0 °C

440 J/(kg·K)

20.0 °C

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)

Thermal conductivity

-100.0 °C

11.7 W/(m·K)

20.0 °C

14.5 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 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 %

Technological properties

Property
Features

Spring


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