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EN 10213 GP240GH Quenched & Tempered Steel – High‑Temperature, Weldable Performance

Material GP240GH is equivalent to trademark GS-C 25 acc. to DIN 17245-87. It is used at room temperature and increased temperatures. The DIN-make shows only a low long-term thermal resistance and is therefore applicated in the range of the hot elastic limit. The well weldable material is used for turbine parts and pressure vessels at temperatures from 300 to 450 °C and mean pressure, e.g. for casings and fittings.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.8 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

211 GPa

100.0 °C

204 GPa

200.0 °C

196 GPa

300.0 °C

186 GPa

400.0 °C

177 GPa

500.0 °C

164 GPa

600.0 °C

127 GPa

Elongation

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

420 - 600 MPa

Yield strength Rp0.2

20.0 °C

240 MPa

100.0 °C

210 MPa

200.0 °C

175 MPa

300.0 °C

145 MPa

350.0 °C

135 MPa

400.0 °C

130 MPa

450.0 °C

125 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.22E-5 - 1.26E-5 1/K

200.0 °C

1.29E-5 1/K

300.0 °C

1.34E-5 1/K

400.0 °C

1.39E-5 1/K

500.0 °C

1.4E-5 - 1.43E-5 1/K

600.0 °C

1.46E-5 1/K

Max service temperature

500 °C

Typical for Carbon Steel

Max service temperature, long

300 - 610 °C

Melting point

1480 - 1526 °C

Typical for Low Carbon Steel

Specific heat capacity

20.0 °C

460 J/(kg·K)

Thermal conductivity

20.0 °C

50 W/(m·K)

50.0 °C

45 W/(m·K)

300.0 °C

46 W/(m·K)

400.0 °C

42 W/(m·K)

500.0 °C

38 W/(m·K)

600.0 °C

34 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.6E-7 Ω·m

Magnetic

PropertyValueComment

Curie temperature

770 °C

Typical for Low Carbon Steel

Chemical properties

PropertyValue

Carbon

0.18 - 0.23 %

Chromium

0.3 %

Copper

0.3 %

Manganese

0.5 - 1.2 %

Molybdenum

0.12 %

Nickel

0.4 %

Phosphorus

0.03 %

Silicon

0.6 %

Sulfur

0.02 %

Vanadium

0.03 %


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