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DIN 17179 WStE 420 Steel Tubes – Normalized/Normalized Formed Grade for High-Performance Applications

The fine grained steel is used acc. DIN 17178 : 1986-5 for welded steel tubes and acc. DIN 17179 : 1986-5 as seamless steel tubes for special purposes from -20 to 400 degrees C. Application: pressure vessel construction, apparatus construction, pipelines, mechanical engineering, toolbuilding Special requirements regarding processing have to be arranged (e.g. coatings). For welded tubes the calculation with the 100 % loads are possible for the seam area.

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

21 %

Elongation, transverse

20.0 °C

19 %

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Steel

Tensile strength

20.0 °C

490 - 650 MPa

100.0 °C

430 - 480 MPa

150.0 °C

410 - 460 MPa

200.0 °C

400 - 450 MPa

250.0 °C

400 - 450 MPa

300.0 °C

400 - 450 MPa

350.0 °C

390 - 440 MPa

400.0 °C

380 - 430 MPa

Tensile strength, transverse

20.0 °C

490 - 650 MPa

Yield strength

20.0 °C

355 - 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

Yield strength, transverse

20.0 °C

355 - 420 MPa

Thermal

PropertyTemperatureValue

Coefficient of thermal expansion

-100.0 °C

1.05E-5 - 1.08E-5 1/K

20.0 °C

1.15E-5 - 1.19E-5 1/K

100.0 °C

1.21E-5 - 1.25E-5 1/K

200.0 °C

1.27E-5 - 1.3E-5 1/K

300.0 °C

1.32E-5 - 1.36E-5 1/K

400.0 °C

1.36E-5 - 1.41E-5 1/K

500.0 °C

1.4E-5 - 1.45E-5 1/K

600.0 °C

1.44E-5 - 1.49E-5 1/K

Max service temperature, long

-20 - 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 %

Nitrogen

0.02 %

Phosphorus

0.04 %

Silicon

0.1 - 0.6 %

Sulfur

0.03 %

Titanium

0.2 %

Vanadium

0.22 %


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    1. DIN 17103 WStE 420: High‑Temperature Normalized Steel for Robust Welded Constructions
    2. DIN 17125 Grade EStE 420 Steel – Normalized or Normalized Formed (+N)
    3. DIN 17179 Grade WStE 460 – Normalized/Normalized Formed Steel Tubes (+N)
    4. WStE 285 Steel (DIN 17103) – Normalized or Normalized Formed (N): Properties & Applications
    5. DIN 17103 WStE 355: High-Temperature Grade Steel – Normalized or Normalized +N
    6. DIN 17125 StE 420 Steel: Normalized or Formed for Low-Temperature Tubes
    7. DIN 17125 Grade TStE 420 (N) – High‑Performance Steel Tubes for Pressure Vessels & Pipelines
    8. DIN 17179 Grade WStE 255: Normalized or Normalized‑Formed Steel Tubes for High‑Temperature Applications
    9. DIN 17179 Grade WStE 285 – Normalized and Normalized‑Formed Steel Tubes
    10. DIN 17179 Grade WStE 355 – Normalized & Normalized-Formed Steel Tubes