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SEW 400 X4CrNiMo16-5 Stainless Steel: Quenched & Tempered (QT1) – High Corrosion Resistance & Low‑Temperature Toughness

Properties: - martensitic stainless steel - good corrosion resistance and very low-temperature toughness to -200 °C - possesses a high corrosion resistance, in particular to water, weak acids and brine, oxidising acids (nitric acid) and weakly chloride containing media Application: - for mechanical engineering for pumps, armatures, compressors, in shipbuilding

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.56 - 7.7 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

198 - 218 GPa

100.0 °C

193 - 213 GPa

200.0 °C

183 - 206 GPa

300.0 °C

175 - 198 GPa

400.0 °C

172 - 190 GPa

500.0 °C

159 - 180 GPa

600.0 °C

167 GPa

700.0 °C

150 GPa

Elongation

20.0 °C

16 %

Elongation, transverse

20.0 °C

14 %

Hardness, Brinell

20.0 °C

260 - 325 [-]

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Martensitic Stainless Steel

Shear modulus

23.0 °C

77 GPa

Typical for Martensitic Stainless Steel

Tensile strength

20.0 °C

830 - 1030 MPa

Tensile strength, transverse

20.0 °C

830 - 1030 MPa

Yield strength Rp0.2

20.0 °C

550 MPa

50.0 °C

540 MPa

100.0 °C

530 MPa

150.0 °C

515 MPa

200.0 °C

500 MPa

250.0 °C

490 MPa

300.0 °C

475 MPa

Yield strength Rp0.2, transverse

20.0 °C

550 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

20.0 °C

9.9E-6 1/K

100.0 °C

1.03E-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

Max service temperature, long

-200 - 0 °C

Melting point

1370 - 1530 °C

Typical for Martensitic 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

0.05 %

Chromium

15 - 16.5 %

Manganese

1.5 %

Molybdenum

0.8 - 1.5 %

Nickel

5 - 6 %

Nitrogen

0.02 %

Phosphorus

0.04 %

Silicon

1 %

Sulfur

0.015 %


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