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EN 10208-2 Grade L245NB: Normalized or Normalizing Formed Seamless & Welded Pipes for Flammable Media

Steel L245NB is produced as seamless or welded pipe for flammable media in condition normalized or normalizing formed. Its yield stress is between 245 and 440 N/mm². The steel is weldable, its carbon equivalent CEV accounts for max. 0.42. To the welding seam (welding methods SAW, COW) applies a mandrel-diameter for the bending test of 3x nominal thickness of the pipe. Pipes are available with interior and exterior coating. Main fields of application are long-distance pipelines for flammable liquids (e.g. crude oil and natural gas products) as well as for compressed and liquefied flammable gases. Pipes acc. to DIN EN 10208-2 : 1996-08 also fulfil the conditions decisive for the consumption acc. to standards 5L, 5LX and 5LS of the American Petroleum Institute (API). When using these pipes has to be considered the Technical rule for flammable liquids (Technische Regel für brennbare FlüssigkeitenTRbF 301).

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.85 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

24 %

Elongation, transverse

20.0 °C

22 %

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

20.0 °C

415 MPa

Tensile strength, transverse

20.0 °C

415 MPa

Yield strength Rp0.5

20.0 °C

245 - 440 MPa

Yield strength, transverse

20.0 °C

245 - 440 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

1480 - 1526 °C

Typical for Low Carbon Steel

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

52.6 W/(m·K)

20.0 °C

53.4 W/(m·K)

100.0 °C

53.3 W/(m·K)

200.0 °C

50.1 W/(m·K)

300.0 °C

46.9 W/(m·K)

400.0 °C

43.2 W/(m·K)

500.0 °C

39.5 W/(m·K)

600.0 °C

36.1 W/(m·K)

Thermal diffusivity

-100.0 °C

18 mm²/s

20.0 °C

14.8 mm²/s

100.0 °C

13.7 mm²/s

200.0 °C

12.1 mm²/s

300.0 °C

10.6 mm²/s

400.0 °C

9.2 mm²/s

500.0 °C

7.6 mm²/s

600.0 °C

6.1 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

-100.0 °C

1.3E-7 Ω·m

20.0 °C

1.95E-7 Ω·m

100.0 °C

2.4E-7 Ω·m

200.0 °C

3.15E-7 Ω·m

300.0 °C

4E-7 Ω·m

400.0 °C

5.03E-7 Ω·m

500.0 °C

6.26E-7 Ω·m

600.0 °C

7.68E-7 Ω·m

Magnetic

PropertyValueComment

Curie temperature

770 °C

Typical for Low Carbon Steel

Chemical properties

PropertyValue

Aluminium

0.015 - 0.06 %

Carbon

0.16 %

Chromium

0.3 %

Copper

0.25 %

Manganese

1.1 %

Molybdenum

0.1 %

Nickel

0.3 %

Nitrogen

0.01 %

Phosphorus

0.03 %

Silicon

0.4 %

Sulfur

0.02 %


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