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EN 10213 Grade G20Mo5 Quenched & Tempered: Premium Steel for Turbine Applications

Material G20Mo5 is equivalent to trademark GS-22 Mo 4 acc. to DIN 17245-87. It is used at room temperature and increased temperatures. The DIN-make is used for turbine parts at temperatures from 300 to 450 °C and mean pressure, e.g. for casings and fittings.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.85 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 Molybdenum Steel

Tensile strength

20.0 °C

440 - 590 MPa

Yield strength Rp0.2

20.0 °C

245 MPa

200.0 °C

190 MPa

300.0 °C

165 MPa

350.0 °C

155 MPa

400.0 °C

150 MPa

450.0 °C

145 MPa

500.0 °C

135 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.22E-5 - 1.24E-5 1/K

200.0 °C

1.29E-5 1/K

300.0 °C

1.31E-5 - 1.34E-5 1/K

400.0 °C

1.39E-5 1/K

500.0 °C

1.38E-5 - 1.43E-5 1/K

600.0 °C

1.46E-5 1/K

Max service temperature, long

300 - 610 °C

Melting point

1382 - 1529 °C

Typical for Molybdenum Steel

Specific heat capacity

20.0 °C

460 J/(kg·K)

Thermal conductivity

20.0 °C

50 W/(m·K)

50.0 °C

43 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

Chemical properties

PropertyValue

Carbon

0.15 - 0.23 %

Chromium

0.3 %

Copper

0.3 %

Manganese

0.5 - 1 %

Molybdenum

0.4 - 0.6 %

Nickel

0.4 %

Phosphorus

0.03 %

Silicon

0.6 %

Sulfur

0.02 %

Vanadium

0.05 %


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