High-performance alloy material for industrial engineering and critical application conditions.
Scope of supply for Aviation Group
Forgings, round rods, steel plates, rings, seamless pipes, steel plates/steel belts, wire welding materials, welcome to inquire!
1. Introduction to GH901 Materials
GH901 is an austenitic age-hardening Fe-43Ni-12Cr alloy strengthened by titanium, aluminum and other reinforcing elements, with trace boron and low carbon content. It obtains dispersion strengthening effect via metastable γ”[Ni3(Ti, Al)] phase, and trace aluminum inhibits the transformation of γ” phase to η-Ni3Ti phase. The alloy features high yield strength and rupture strength below 650℃, good oxidation resistance below 760℃ and stable microstructure for long-term service. As an early developed mature alloy, it is widely applied to manufacture rotating disk components (turbine disks, compressor disks, shaft journals, etc.), static structural parts, turbine outer rings and fasteners for aviation and ground gas turbine engines operating below 650℃.
2. Chemical composition of GH901
| Alloy | Limit | Ni | Cr | Fe | C | Mn | Si | Mo | Al | Ti | Bi | P | Cu | Pb | B | S |
| GH901 | Minimum | 40.0 | 11.0 | Bal | 0.02 | – | – | 5.0 | – | 2.8 | – | – | – | – | 0.01 | – |
| Maximum | 45.0 | 14.0 | 0.06 | 0.50 | 0.40 | 6.5 | 0.30 | 3.1 | 0.001 | 0.020 | 0.20 | 0.001 | 0.02 | 0.008 |
3. GH901 reference standards
WS9-7029 blank-1996 GH901 alloy shaft bar materials
WS9-7029 disc blank-1996 GH901 alloy rotating part billets
WS9-7029 Forgings-1996 GH901 alloy disk and shaft forgings
WS9-7031-1996 GH901 alloy hot rolled & forged bars
WS9-7031 ring blank-1996 GH901 alloy rolled ring blanks for structural parts
WS9-7031 ring parts-1996 GH901 alloy rolled ring components
WS9-7031-1996 GH901 alloy flash welded ring profiles
4. GH901 physical properties
| Density | 8.21g/cm³ |
| Melting point | 1360℃ |
GH901 Thermal Conductivity
| Temperature/℃ | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 |
| Thermal conductivity λ/(W/(m·℃)) | 12.0 | 13.5 | 15.1 | 16.7 | 18.2 | 19.8 | 21.2 | 22.8 | 24.3 | 25.1 |
GH901 linear expansion coefficient
| Temperature range/℃ | 20～100 | 20～200 | 20～300 | 20～400 | 20～500 | 20～600 | 20～700 | 20～800 | 20～900 |
| Linear expansion coefficient/(10⁻⁶/℃) | 13.5 | 14.0 | 14.4 | 14.9 | 15.1 | 15.2 | 15.5 | 16.0 | 16.5 |
GH901 thermal diffusivity
| Temperature/℃ | 20 | 100 | 150 | 250 | 350 | 450 | 550 | 650 | 950 |
| Thermal diffusivity Q/(10⁻⁶m²/s) | 2.66 | 2.93 | 3.00 | 3.18 | 3.47 | 3.73 | 3.78 | 4.02 | 4.11 |
5. Material characteristics
GH901 heat treatment process
1090℃±10℃, 2~3h, water/oil cooling +775℃±5℃, 4h, air cooling +700~720℃, 24h, air cooling
GH901 product forms
Various disk forgings, rolled rings, bars and other forgings, supplied in heat-treated or as-forged state.
GH901 smelting & casting process
The alloy adopts dual smelting route: vacuum induction melting + vacuum arc remelting; vacuum induction melting + electroslag remelting is also available.
6. GH901 application overview & technical requirements
This alloy has been widely applied overseas for long-life rotating components and fasteners below 650℃ on aircraft engines and ground gas turbines. It has also been verified and put into service on domestic aero-engines as a mature superalloy grade.
