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EN 10217-3: P355NH – Premium Creep-Resistant Fine-Grain Structural Steel

The steel P355NH is a creep-resistant weldable fine-grain structural steel (alloy quality steel). Tubes made of this steel are used in the pressure vessel construction, apparatus construction, pipeline construction as well as in the general mechanical engineering and device construction. Maximum operation temperature: approximately 400 degrees C.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.83 - 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

Poisson's ratio

23.0 °C

0.29 [-]

Typical for Low Carbon Steel

Shear modulus

23.0 °C

82 GPa

Typical for Low Carbon Steel

Tensile strength

100.0 °C

420 - 440 MPa

150.0 °C

410 - 430 MPa

200.0 °C

390 - 410 MPa

250.0 °C

390 - 410 MPa

300.0 °C

390 - 410 MPa

350.0 °C

380 - 400 MPa

400.0 °C

370 - 390 MPa

Yield strength Rp0.2

100.0 °C

294 - 304 MPa

150.0 °C

275 - 284 MPa

200.0 °C

255 MPa

250.0 °C

235 MPa

300.0 °C

216 MPa

350.0 °C

196 MPa

400.0 °C

167 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.08E-5 1/K

20.0 °C

1.19E-5 1/K

100.0 °C

1.25E-5 1/K

200.0 °C

1.3E-5 1/K

300.0 °C

1.36E-5 1/K

400.0 °C

1.41E-5 1/K

500.0 °C

1.45E-5 1/K

600.0 °C

1.49E-5 1/K

Max service temperature

500 °C

Typical for Carbon Steel

Max service temperature, long

0 - 400 °C

Melting point

1480 - 1526 °C

Typical for Low Carbon Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

430 - 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

37.6 W/(m·K)

20.0 °C

42 - 42.2 W/(m·K)

100.0 °C

43.2 W/(m·K)

200.0 °C

42.9 W/(m·K)

300.0 °C

41.2 W/(m·K)

400.0 °C

39.1 W/(m·K)

500.0 °C

36.6 W/(m·K)

600.0 °C

34.1 W/(m·K)

Thermal diffusivity

-100.0 °C

12.9 mm²/s

20.0 °C

11.7 mm²/s

100.0 °C

11.2 mm²/s

200.0 °C

10.3 mm²/s

300.0 °C

9.4 mm²/s

400.0 °C

8.3 mm²/s

500.0 °C

7.1 mm²/s

600.0 °C

5.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

-100.0 °C

1.82E-7 Ω·m

20.0 °C

2.47E-7 - 2.5E-7 Ω·m

100.0 °C

2.96E-7 Ω·m

200.0 °C

3.68E-7 Ω·m

300.0 °C

4.55E-7 Ω·m

400.0 °C

5.56E-7 Ω·m

500.0 °C

6.75E-7 Ω·m

600.0 °C

8.13E-7 Ω·m

Magnetic

PropertyValueComment

Curie temperature

770 °C

Typical for Low Carbon Steel

Chemical properties

PropertyValue

Aluminium

0.02 %

Carbon

0.2 %

Chromium

0.3 %

Copper

0.3 %

Manganese

0.9 - 1.7 %

Molybdenum

0.08 %

Nickel

0.5 %

Niobium

0.05 %

Nitrogen

0.02 %

Phosphorus

0.03 %

Silicon

0.5 %

Sulfur

0.02 %

Titanium

0.03 %

Vanadium

0.1 %


Metal

  1. EN 10217-3 Grade P460NH – High-Performance Creep-Resistant Steel for High-Temperature Applications
  2. EN 10217-3 P460NL1 Normalized Steel – High‑Strength, Low‑Temperature Weldable Grade
  3. EN 10217-3 Grade P460NL2 – High‑Toughness Normalized Steel for Sub‑Zero Applications
  4. EN 10217-3 Grade P460NH: High-Temperature Creep-Resistant Weldable Steel for Pressure Vessels & Pipelines
  5. EN 10217-3 Grade P355N: Normalized & Normalized Formed Steel for Pressure Vessels & Pipelines
  6. EN 10273 Grade P355NH – Normalized & Normalized-Formed (N) High‑Temperature Steel for Pressure Vessels
  7. EN 10222‑4 Grade P355NH Steel – Normalized/Normalized‑Formed (+N) for High‑Strength Applications
  8. EN 10217-3: P460N Fine-Grain Structural Steel – Normalized or Normalized Formed (+N)
  9. EN 10217-3 Grade P355NL2 – Normalized or Normalized Formed (+N) Steel for Low-Temperature Applications
  10. EN 10217-3 Grade P355NH: Normalized or Normalized Formed (+N) Fine-Grain Creep-Resistant Steel