GH3128
GH3128 alloy (GH128) is a nickel-based alloy solid solution strengthened with tungsten and molybdenum and strengthened with boron, cerium and zirconium grain boundaries, with high plasticity, high creep strength and good oxidation resistance and stamping, welding and other properties. Its comprehensive performance is better than GH3044 and GH3536 and other similar nickel-based solid solution alloys
Suitable for manufacturing combustion chamber flame tubes, afterburner shells, regulator plates and other high-temperature aeroengines that operate at 950°C for a long time.Parts and components, the main products are cold-rolled sheets, but we can also supply hot-rolled plates, bars, forgings, wires and pipes.
Content
Chemical composition of GH3128(%)
| Element | Minimum(%) | Maximum(%) |
|---|---|---|
| Ni | remiander | remiander |
| Cr | 19 | 22 |
| Fe | - | 0.2 |
| Mo | 7.5 | 9 |
| W | 7.5 | 9 |
| C | - | 0.05 |
| Mn | - | 0.5 |
| Si | - | 0.8 |
| S | - | 0.13 |
| P | - | 0.13 |
| Al | 0.4 | 0.8 |
| Ti | 0.4 | 0.8 |
Physical properties of GH3128
| Property | Value |
|---|---|
| Density | 8.81 g/cm³ |
| Melting range | 1340-1390 ℃ |
| Thermal conductivity | 11.3 W/m•K（at 100℃) |
| Specific heat capacity | 460 J/kg·K (at 20℃) |
| Electrical Resistivity | 1.37μΩ•m |
| Coefficient of Linear Thermal Expansion | 11.25 x 10⁻⁶ ℃/K(at 20~100℃) |
| Elastic modulus | 208 GPa |
Mechanical properties of GH3128 alloy
| Property | Value |
|---|---|
| Tensile Strength | 900 – 1100 MPa |
| Yield Strength | ≥ 600 MPa |
| Elongation | ≥ 20% |
| Reduction of Area | ≥ 20% |
| Hardness (HB) | 200 – 240 |
| Creep Rupture Strength (600°C, 1000h) | ≥ 196 MPa |
Applications of GH3128
GH3128 is a nickel-based superalloy known for its excellent high-temperature strength, oxidation resistance, and good fabricability. It is used in various industries where these properties are critical. Below are the main applications of GH3128:
1. Aerospace Industry
- Turbine Components: GH3128 is widely used in the manufacturing of turbine blades, discs, and other critical components in aircraft engines. The alloy’s ability to retain its mechanical properties at elevated temperatures makes it ideal for these applications.
- Combustion Chambers: The alloy is employed in the construction of combustion chambers due to its resistance to high-temperature oxidation and corrosion, ensuring longevity and reliability in harsh environments.
2. Power Generation
- Gas Turbines: GH3128 is utilized in the hot sections of gas turbines, such as vanes, blades, and exhaust systems. Its high creep resistance and thermal stability are crucial for efficient and long-lasting turbine operation.
- Heat Exchangers: The alloy is also used in heat exchangers where high thermal conductivity and resistance to thermal fatigue are required.
3. Chemical and Petrochemical Industry
- Furnace Components: GH3128’s resistance to oxidation and sulfidation at high temperatures makes it suitable for furnace components, such as retorts and trays used in the chemical processing industry.
- Piping Systems: The alloy is used in high-temperature piping systems, particularly in environments that involve corrosive gases or chemicals, ensuring both durability and performance.
4. Automotive Industry
- Exhaust Manifolds: In high-performance automotive applications, GH3128 is used for exhaust manifolds due to its ability to withstand high temperatures and thermal cycling without degradation.
5. Industrial Equipment
- Heat Treatment Equipment: The alloy is used in components such as furnace rolls, belts, and fixtures in heat treatment plants due to its high-temperature strength and resistance to thermal shock.
- Springs and Fasteners: GH3128 is used in the production of high-temperature springs and fasteners where mechanical stability at elevated temperatures is essential.
6. Nuclear Industry
- Reactor Components: GH3128 is employed in nuclear reactors, particularly in components exposed to high temperatures and corrosive environments, due to its excellent combination of strength and corrosion resistance.
