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DIN 17103 WStE 420: High‑Temperature Normalized Steel for Robust Welded Constructions

The fine grained steel WStE 420 (high temperature grade) is used for welded constructions of different kind like pressure vessels, stationary or mobile storage tanks, high pressure lines, bridge and support constructions etc. The application temperature of the high temperature grade amounts to 400 °C.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.84 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

212 GPa

100.0 °C

207 GPa

200.0 °C

199 GPa

300.0 °C

192 GPa

400.0 °C

184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Elongation

20.0 °C

19 %

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Steel

Tensile strength

20.0 °C

490 - 680 MPa

Yield strength

20.0 °C

345 - 420 MPa

Yield strength Rp0.2

100.0 °C

314 - 363 MPa

150.0 °C

294 - 343 MPa

200.0 °C

275 - 314 MPa

250.0 °C

245 - 284 MPa

300.0 °C

226 - 265 MPa

350.0 °C

196 - 235 MPa

400.0 °C

167 - 206 MPa

Thermal

PropertyTemperatureValue

Coefficient of thermal expansion

-100.0 °C

1.05E-5 1/K

20.0 °C

1.15E-5 1/K

100.0 °C

1.21E-5 1/K

200.0 °C

1.27E-5 1/K

300.0 °C

1.32E-5 1/K

400.0 °C

1.36E-5 1/K

500.0 °C

1.4E-5 1/K

600.0 °C

1.44E-5 1/K

Max service temperature, long

0 - 400 °C

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

461 J/(kg·K)

100.0 °C

479 J/(kg·K)

200.0 °C

499 J/(kg·K)

300.0 °C

517 J/(kg·K)

400.0 °C

536 J/(kg·K)

500.0 °C

558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Thermal conductivity

-100.0 °C

35.4 W/(m·K)

20.0 °C

40.4 W/(m·K)

100.0 °C

42 W/(m·K)

200.0 °C

42 W/(m·K)

300.0 °C

40.8 W/(m·K)

400.0 °C

38.9 W/(m·K)

500.0 °C

36.6 W/(m·K)

600.0 °C

34.3 W/(m·K)

Thermal diffusivity

-100.0 °C

12.1 mm²/s

20.0 °C

11.2 mm²/s

100.0 °C

10.8 mm²/s

200.0 °C

10.1 mm²/s

300.0 °C

9.3 mm²/s

400.0 °C

8.3 mm²/s

500.0 °C

7 mm²/s

600.0 °C

5.8 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

-100.0 °C

1.93E-7 Ω·m

20.0 °C

2.58E-7 Ω·m

100.0 °C

3.05E-7 Ω·m

200.0 °C

3.76E-7 Ω·m

300.0 °C

4.6E-7 Ω·m

400.0 °C

5.59E-7 Ω·m

500.0 °C

6.75E-7 Ω·m

600.0 °C

8.08E-7 Ω·m

Chemical properties

PropertyValue

Aluminium

0.02 %

Carbon

0.2 %

Chromium

0.3 %

Copper

0.2 %

Manganese

1 - 1.7 %

Molybdenum

0.1 %

Nickel

1 %

Niobium

0.05 %

Nitrogen

0.02 %

Phosphorus

0.04 %

Silicon

0.1 - 0.6 %

Sulfur

0.03 %

Vanadium

0.2 %


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