DIN 17245: GS-22Mo4 Quenched & Tempered Steel for High-Performance Turbine Parts
GS-C 22 Mo 4 is used for turbine parts and pressure vessels at low temperature (300 to 450 °C) and medium pressure, e.g. for housings and armatures.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 7.85 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
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 | 20.0 °C | 245 MPa | |
Yield strength Rp0.2 | 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
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 100.0 °C | 1.22E-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 | 1.43E-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) | |
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
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 20.0 °C | 1.6E-7 Ω·m |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.18 - 0.23 % |
Chromium | 0.3 % |
Manganese | 0.5 - 0.8 % |
Molybdenum | 0.35 - 0.45 % |
Phosphorus | 0.02 % |
Silicon | 0.3 - 0.6 % |
Sulfur | 0.015 % |
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