GH1035 Alloy

GH1035 is a nickel-based solid solution strengthened wrought superalloy, mainly reinforced by solid solution strengthening of elements such as chromium, tungsten, and molybdenum. It exhibits excellent high-temperature oxidation resistance, thermal fatigue resistance, and stable mechanical properties, and can operate continuously in high-temperature environments up to 1000-1100℃. This alloy is widely used in industries that demand superior heat resistance and structural reliability of materials. The following is a detailed overview of its chemical composition, physical properties, and application products.

1. Chemical Composition (Mass Fraction, %)

2. Physical Properties

1. Density: At room temperature, the density is approximately 8.45g/cm³, which is slightly higher than that of common Fe-Ni-Cr-based superalloys. This density characteristic needs to be considered in the weight optimization design of high-temperature structural components, while its excellent mechanical properties can offset the impact of higher density on load-bearing performance.
2. Thermal Properties:

• Melting temperature range: 1450-1510℃, which is one of the advantages of this alloy in coping with ultra-high-temperature working conditions. The high melting point ensures that the alloy does not undergo melting or severe softening even in short-term ultra-high-temperature environments;
• Thermal expansion coefficient: It is about 11.8×10⁻⁶/℃ in the range of 20-100℃, and increases to approximately 13.2×10⁻⁶/℃ in the range of 20-1000℃. The relatively low thermal expansion coefficient and stable change trend help reduce thermal stress caused by temperature fluctuations, thereby improving the thermal fatigue life of components;
• Thermal conductivity: At 100℃, the thermal conductivity is about 14.8W/(m・K); at 1000℃, it rises to around 24.2W/(m・K). The gradual increase in thermal conductivity with temperature is conducive to the rapid dissipation of local heat in high-temperature components, avoiding excessive local temperature rise and material performance degradation.

1. Mechanical Properties (After solution treatment at 1150-1200℃, water cooling):

• Yield strength (σ₀.₂, room temperature): ≥650MPa, showing strong resistance to plastic deformation at normal temperature, which is crucial for ensuring the structural stability of components under static load;
• Tensile strength (σᵦ, room temperature): ≥750MPa, providing excellent overall load-bearing capacity, enabling the alloy to withstand complex external forces such as tension and bending in engineering applications;
• Elongation (δ₅, room temperature): ≥35%, with good plastic deformation ability, making it easy to form into various shapes of components through processes such as forging, rolling, and stamping, and reducing the risk of cracking during processing;
• High-temperature mechanical properties (at 1000℃): Yield strength ≥280MPa, tensile strength ≥350MPa, elongation ≥18%. Even in high-temperature environments close to its service limit, it can still maintain sufficient strength and plasticity, meeting the long-term use requirements of high-temperature structural parts.

1. Magnetic Properties: It maintains non-magnetic characteristics in the entire service temperature range (room temperature to 1100℃), which is particularly important for applications in magnetic field-sensitive environments, such as high-temperature components near electromagnetic induction equipment or nuclear magnetic resonance-related devices.

3. Application Products

Benefiting from its excellent comprehensive high-temperature performance, GH1035 alloy has become a key material in high-end high-temperature equipment manufacturing, and its core application products include:

• Aerospace Field: As a critical material for advanced aero-engines and aerospace propulsion systems, it is mainly used to manufacture high-temperature hot-end components such as turbine blades (for medium and low-pressure stages), turbine disks, and combustion chamber liners. These components are exposed to high-temperature, high-pressure gas for a long time, and the alloy’s high-temperature strength and oxidation resistance can effectively ensure the safe and stable operation of the engine; it is also used in the thermal protection system of hypersonic aircraft to resist aerodynamic heating.
• Energy Field: In the field of thermal power generation, it is used to produce ultra-supercritical boiler tubes and high-temperature headers, which can withstand the erosion of high-temperature (above 600℃) and high-pressure (above 30MPa) steam, improving the thermal efficiency of power plants while extending the service life of equipment; in nuclear energy, it is applied to the manufacturing of high-temperature heat exchange tubes in fast neutron reactors, resisting the corrosion of high-temperature liquid metal coolants and the influence of neutron radiation.
• Petrochemical Field: Suitable for manufacturing high-temperature cracking furnace tubes and reactor cores in ethylene production units. These components need to work in environments with temperatures up to 950-1050℃ and corrosive media (such as hydrocarbons and hydrogen), and the alloy’s resistance to high-temperature corrosion and creep performance can ensure the long-term stable operation of the cracking process, reducing maintenance costs.
• Other High-Temperature Fields: In the metallurgical industry, it is used to make high-temperature furnace rolls and heating elements in continuous annealing furnaces, withstanding long-term high-temperature oxidation and mechanical wear; in the semiconductor industry, it is applied to the manufacturing of high-temperature process chambers for epitaxial growth equipment, ensuring the purity and stability of the process environment; it is also used in high-temperature test equipment, such as the heating furnace lining of material performance testing machines.