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EN 10217-2: Grade P265GH Normalized or Normalized‑Formed Steel for High‑Temperature Applications

Electrical welded tubes made of the heat-resistant non-alloy quality steel P265GH are used for steam pressure vessels, tube construction, pressure vessel and apparatus manufacturing mainly in the chemical industry for temperatures up to 200 °C and simultaneous high pressures. The total load and the special scale relationships may decrease or increase the temperature limit.

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

23 %

Elongation, transverse

20.0 °C

21 %

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

410 - 570 MPa

Tensile strength, transverse

20.0 °C

410 - 570 MPa

Yield strength

20.0 °C

255 - 265 MPa

100.0 °C

228 - 238 MPa

150.0 °C

211 - 221 MPa

200.0 °C

195 - 205 MPa

250.0 °C

175 - 185 MPa

300.0 °C

155 - 160 MPa

350.0 °C

141 MPa

400.0 °C

134 MPa

450.0 °C

128 MPa

Yield strength Rp0.2

20.0 °C

255 - 265 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

200 - 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

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

20.0 °C

51 W/(m·K)

100.0 °C

50.8 W/(m·K)

200.0 °C

48.7 W/(m·K)

300.0 °C

45.8 W/(m·K)

400.0 °C

42.5 W/(m·K)

500.0 °C

39.2 W/(m·K)

600.0 °C

36 W/(m·K)

Thermal diffusivity

20.0 °C

14.1 mm²/s

100.0 °C

13.1 mm²/s

200.0 °C

11.7 mm²/s

300.0 °C

10.4 mm²/s

400.0 °C

9 mm²/s

500.0 °C

7.6 mm²/s

600.0 °C

6.1 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

2.04E-7 Ω·m

100.0 °C

2.52E-7 Ω·m

200.0 °C

3.24E-7 Ω·m

300.0 °C

4.1E-7 Ω·m

400.0 °C

5.12E-7 Ω·m

500.0 °C

6.31E-7 Ω·m

600.0 °C

7.7E-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

1.4 %

Molybdenum

0.08 %

Nickel

0.3 %

Niobium

0.01 %

Phosphorus

0.03 %

Silicon

0.4 %

Sulfur

0.02 %

Titanium

0.03 %

Vanadium

0.02 %


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