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EN 10217-3 Grade P355N: Normalized & Normalized Formed Steel for Pressure Vessels & Pipelines

The steel P355N is a 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.

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

Elongation

20.0 °C

22 %

Elongation, transverse

20.0 °C

20 %

Poisson's ratio

23.0 °C

0.29 [-]

Typical for Medium Carbon Steel

Shear modulus

23.0 °C

75 - 80 GPa

Typical for Carbon Steel

Tensile strength

20.0 °C

490 - 650 MPa

Tensile strength, transverse

20.0 °C

490 - 650 MPa

Yield strength

20.0 °C

345 - 355 MPa

Yield strength, transverse

20.0 °C

345 - 355 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

Melting point

1380 - 1514 °C

Typical for Medium 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

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 %


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    1. EN 10217-3 P460NL1 Normalized Steel – High‑Strength, Low‑Temperature Weldable Grade
    2. EN 10217-3 Grade P460NL2 – High‑Toughness Normalized Steel for Sub‑Zero Applications
    3. EN 10217-3 Grade P460NH: High-Temperature Creep-Resistant Weldable Steel for Pressure Vessels & Pipelines
    4. EN 10216-3: P355N Normalized/Normalized Formed Steel – High-Performance Pressure Vessel Material
    5. EN 10217-3 P275NL2: Normalized or Normalized-Formed (N) Structural Steel
    6. EN 10217-3: P460N Fine-Grain Structural Steel – Normalized or Normalized Formed (+N)
    7. EN 10217-3 Grade P355NL2 – Normalized or Normalized Formed (+N) Steel for Low-Temperature Applications
    8. EN 10217-3 P275NL1 Normalized Steel Tubes – High Strength, Weldability, and Low‑Temperature Performance
    9. EN 10217-3 Grade P355NL1 – Normalized or Normalized Formed (N) Steel: Superior Strength for Structural Use
    10. EN 10217-3 Grade P355NH: Normalized or Normalized Formed (+N) Fine-Grain Creep-Resistant Steel