GH4202
GH4202 is a Ni-Cr based precipitation hardening deformation high temperature alloy, with a service temperature of -253-800 degrees Celsius. Tungsten and molybdenum elements are added to the alloy for solid solution strengthening, aluminum and titanium elements are added to form aging strengthening phases, and a small amount of boron and cerium elements are added to purify and strengthen the grain boundaries. The alloy has good comprehensive mechanical properties and stable structure. The alloy has high corrosion resistance and oxidation resistance, as well as good resistance to oxygen-rich erosion. This alloy is a typical multi-purpose high temperature alloy material.
Chemical composition of GH4202(%)
| Element | Minimum(%) | Maximum(%) |
|---|---|---|
| C | - | 0.08 |
| Cr | 17 | 20 |
| Ni | remiander | remiander |
| Al | 1 | 1.5 |
| Ti | 2.2 | 2.6 |
| Cu | - | 0.07 |
| W | 4 | 5 |
| Mo | 4 | 5 |
| Fe | - | 4 |
| Ce | - | 0.01 |
| B | - | 0.01 |
| S | - | 0.01 |
| P | - | 0.015 |
| Si | - | 0.6 |
| Mn | - | 0.5 |
Physical properties of GH4202
| Property | Value |
|---|---|
| Density | 8.36 g/cm3 |
| Thermal conductivity | 12.8-28.8 W/m•K（at 100-800℃) |
| Coefficient of Linear Thermal Expansion | 14.8 x 10⁻⁶ ℃/K(at 20~100℃) |
| Elastic modulus | 216 GPa |
Mechanical properties of GH4202 alloy
| Property | Value |
|---|---|
| Tensile Strength | ≥930 MPa |
| Elongation | ≥16% |
| Reduction of area | ≥18% |
Applications of GH4202
- Dozens of parts such as turbine rotors, rectifiers, turbine shells, bellows and gas pipelines of new high-thrust liquid rocket engines are in good condition.
- Promote the application in aviation, nuclear energy, petroleum and chemical industries, etc., which require high corrosion resistance and oxidation resistance. Heat-resistant bearing parts and welded parts.
