GH698
GH4698/GH698 is a nickel-based high-temperature alloy strengthened with aluminum, titanium, molybdenum, niobium and other elements. It is developed by alloying the GH4033 alloy. It has high endurance strength and good comprehensive performance in the range of 500℃~800℃. This alloy is widely used in the manufacture of important bearing parts such as turbine disks, compressor disks, guide vanes, bearing rings, etc. of aircraft engines. The operating temperature can reach 750℃~800℃.
Chemical composition of GH698(%)
| Element | Minimum(%) | Maximum(%) |
|---|---|---|
| Ni | remiander | remiander |
| Cr | 13 | 16 |
| Fe | - | 2 |
| C | - | 0.08 |
| Mn | - | 0.4 |
| Si | - | 0.6 |
| Mo | 2.8 | 3.2 |
| Al | 1.3 | 1.7 |
| Ti | 2.35 | 2.75 |
| Nb | 1.8 | 2.2 |
| P | - | 0.015 |
| Cu | - | 0.07 |
| Ce | - | 0.02 |
| B | - | 0.005 |
| S | - | 0.007 |
Physical properties of GH698
| Property | Value |
|---|---|
| Density | 8.32 g/cm3 |
| Melting range | 1340-1365 ℃ |
Applications of GH698
- Suitable for long-term use of aircraft engine turbine discs, compressor discs, guide vanes, bearing rings and other important bearing parts below 750~800℃
- Used for high endurance strength below 500~800℃ and can be widely used in various high-demand occasions. Such as: aircraft engines, turbine discs, compressor discs, guide vanes, bearing rings.
