EN 10270-3 Grade X7CrNiAl17-7 cold drawn

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Description

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.

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

7.92 g/cm³

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Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

206 GPa

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20.0 °C

190 - 200 GPa

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100.0 °C

190 GPa

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200.0 °C

182 GPa

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300.0 °C

174 GPa

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400.0 °C

166 GPa

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500.0 °C

158 GPa

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600.0 °C

150 GPa

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700.0 °C

142 GPa

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800.0 °C

134 GPa

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Poisson's ratio

23.0 °C

0.3 [-]

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Typical for Steel

Shear modulus

20.0 °C

73 - 78 GPa

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Tensile strength

20.0 °C

1250 - 2280 MPa

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Thermal

PropertyTemperatureValue

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/K

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200.0 °C

1.72E-5 1/K

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300.0 °C

1.77E-5 1/K

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400.0 °C

1.81E-5 1/K

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500.0 °C

1.84E-5 1/K

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600.0 °C

1.88E-5 1/K

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700.0 °C

1.91E-5 1/K

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800.0 °C

1.94E-5 1/K

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Max service temperature, long

-150 - 350 °C

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Specific heat capacity

-100.0 °C

440 J/(kg·K)

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20.0 °C

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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Thermal conductivity

-100.0 °C

11.7 W/(m·K)

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20.0 °C

14.5 W/(m·K)

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100.0 °C

16 W/(m·K)

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200.0 °C

17.6 W/(m·K)

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300.0 °C

19.1 W/(m·K)

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400.0 °C

20.4 W/(m·K)

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500.0 °C

21.9 W/(m·K)

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600.0 °C

23.3 W/(m·K)

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700.0 °C

24.7 W/(m·K)

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800.0 °C

26.1 W/(m·K)

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Thermal diffusivity

-100.0 °C

3.7 mm²/s

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20.0 °C

3.9 mm²/s

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100.0 °C

4.3 mm²/s

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200.0 °C

4.3 mm²/s

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300.0 °C

4.6 mm²/s

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400.0 °C

4.7 mm²/s

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500.0 °C

4.9 mm²/s

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600.0 °C

5 mm²/s

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700.0 °C

5.3 mm²/s

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800.0 °C

5.7 mm²/s

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Electrical

PropertyTemperatureValue

Electrical resistivity

-100.0 °C

5.86E-7 Ω·m

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20.0 °C

6.92E-7 Ω·m

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100.0 °C

7.58E-7 Ω·m

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200.0 °C

8.36E-7 Ω·m

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300.0 °C

9.07E-7 Ω·m

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400.0 °C

9.73E-7 Ω·m

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500.0 °C

1.02E-6 Ω·m

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600.0 °C

1.06E-6 Ω·m

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700.0 °C

1.1E-6 Ω·m

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800.0 °C

1.13E-6 Ω·m

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Chemical properties

PropertyValue

Aluminium

0.7 - 1.5 %

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Carbon

0.09 %

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Chromium

16 - 18 %

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Manganese

1 %

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Nickel

6.5 - 7.8 %

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Phosphorus

0.04 %

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Silicon

0.7 %

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Sulfur

0.015 %

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Technological properties

Property
Features

Spring