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SEW 400 X2CrMoNb18-2 Steel – Soft-Annealed Grade (+A) for High-Performance Applications

Properties: - ferritic steel with small tendency to solidificate - tends heat treatment wiht following cold forming strongly to the coarse grain formation - corrosion resistant in oxidising and sour media, insensitively to crack corrosion - due to the good magnetic characteristics also for magnetic valves Application: - in chemistry and food industry as cold-upset joining element

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.56 - 7.7 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

218 - 220 GPa

100.0 °C

213 - 216 GPa

200.0 °C

206 - 209 GPa

300.0 °C

198 - 200 GPa

400.0 °C

190 - 192 GPa

500.0 °C

180 - 183 GPa

600.0 °C

167 GPa

700.0 °C

150 GPa

Elongation

20.0 °C

20 %

Hardness, Brinell

20.0 °C

200 [-]

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Ferritic Stainless Steel

Shear modulus

23.0 °C

77 GPa

Typical for Ferritic Stainless Steel

Tensile strength

20.0 °C

450 - 650 MPa

Yield strength Rp0.2

20.0 °C

320 MPa

50.0 °C

300 MPa

100.0 °C

280 MPa

150.0 °C

260 MPa

200.0 °C

245 MPa

250.0 °C

230 MPa

300.0 °C

220 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

20.0 °C

9.9E-6 1/K

100.0 °C

1.03E-5 - 1.04E-5 1/K

200.0 °C

1.08E-5 1/K

300.0 °C

1.12E-5 1/K

400.0 °C

1.16E-5 1/K

500.0 °C

1.19E-5 1/K

600.0 °C

1.21E-5 1/K

700.0 °C

1.24E-5 1/K

800.0 °C

1.29E-5 1/K

Melting point

1425 - 1530 °C

Typical for Ferritic Stainless Steel

Specific heat capacity

20.0 °C

430 - 450 J/(kg·K)

100.0 °C

482 J/(kg·K)

200.0 °C

506 J/(kg·K)

300.0 °C

525 J/(kg·K)

400.0 °C

547 J/(kg·K)

500.0 °C

576 J/(kg·K)

600.0 °C

616 J/(kg·K)

Thermal conductivity

20.0 °C

15 - 16 W/(m·K)

100.0 °C

17.2 W/(m·K)

200.0 °C

18.6 W/(m·K)

300.0 °C

20 W/(m·K)

400.0 °C

21.2 W/(m·K)

500.0 °C

22.3 W/(m·K)

600.0 °C

23.3 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

4.7 mm²/s

100.0 °C

4.5 mm²/s

200.0 °C

4.5 mm²/s

300.0 °C

4.6 mm²/s

400.0 °C

4.4 mm²/s

500.0 °C

4.1 mm²/s

600.0 °C

3.6 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

8E-7 - 9.06E-7 Ω·m

100.0 °C

9.42E-7 Ω·m

200.0 °C

9.87E-7 Ω·m

300.0 °C

1.03E-6 Ω·m

400.0 °C

1.08E-6 Ω·m

500.0 °C

1.12E-6 Ω·m

600.0 °C

1.18E-6 Ω·m

700.0 °C

1.22E-6 Ω·m

800.0 °C

1.24E-6 Ω·m

900.0 °C

1.26E-6 Ω·m

1000.0 °C

1.27E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.025 %

Chromium

17 - 19 %

Manganese

1 %

Molybdenum

1.8 - 2.3 %

Nickel

0.25 %

Phosphorus

0.05 %

Silicon

1 %

Sulfur

0.03 %


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