GH1016 Alloy

GH1016 is an Fe-Ni-Cr-based solid solution strengthened wrought superalloy, with its performance enhanced primarily through the solid solution strengthening effect of tungsten, molybdenum, and chromium. It boasts excellent high-temperature strength, outstanding oxidation resistance, and reliable thermal processing performance, enabling long-term stable operation in high-temperature environments ranging from 800℃ to 1000℃. This alloy is widely utilized in industries that have strict demands for material heat resistance and structural durability. The following is a detailed breakdown of its chemical composition, physical properties, and application products.

1. Chemical Composition (Mass Fraction, %)

2. Physical Properties

1. Density: At room temperature, the density of GH1016 is approximately 8.35g/cm³, which is consistent with the density range of typical Fe-Ni-Cr-based superalloys. This characteristic facilitates accurate weight calculation during the structural design of high-temperature components, helping to balance the requirements of equipment lightweight and load-bearing capacity.
2. Thermal Properties:

◦ Melting temperature range: 1430-1490℃. The relatively wide and high melting temperature range ensures that the alloy does not melt or experience significant deformation under harsh high-temperature working conditions, providing a reliable material foundation for withstanding extreme thermal environments.

◦ Thermal expansion coefficient: It is about 12.0×10⁻⁶/℃ in the temperature range of 20-100℃, and increases to approximately 13.5×10⁻⁶/℃ when the temperature rises to 20-800℃. The stable change trend of the thermal expansion coefficient helps reduce thermal stress generated by temperature fluctuations, thereby minimizing the risk of component deformation or cracking caused by thermal fatigue.

◦ Thermal conductivity: At 100℃, the thermal conductivity is around 15.2W/(m・K); when the temperature reaches 800℃, it increases to roughly 23.5W/(m・K). The gradual increase in thermal conductivity with temperature is beneficial for the rapid transfer of local heat in high-temperature components, avoiding excessive local temperature rise and subsequent degradation of material performance.

1. Mechanical Properties (After solution treatment at 1100-1150℃ and air cooling):

◦ Yield strength (σ₀.₂, room temperature): ≥580MPa. This high yield strength enables the alloy to resist plastic deformation effectively at normal temperature, ensuring the structural stability of components under static load conditions.

◦ Tensile strength (σᵦ, room temperature): ≥650MPa. The excellent tensile strength allows the alloy to withstand complex external forces such as tension and bending in engineering applications, meeting the load-bearing requirements of key components.

◦ Elongation (δ₅, room temperature): ≥30%. Good elongation endows the alloy with strong plastic deformation capacity, making it easy to be processed into components of various shapes through forging, rolling, and other processes, while reducing the probability of cracking during processing.

◦ High-temperature mechanical properties (at 800℃): The yield strength is ≥250MPa, the tensile strength is ≥320MPa, and the elongation is ≥15%. Even in high-temperature environments close to its service limit, the alloy can still maintain sufficient strength and plasticity, fully meeting the long-term use requirements of high-temperature structural parts.

1. Magnetic Properties: GH1016 remains non-magnetic in the entire service temperature range (from room temperature to 1000℃). This property makes it particularly suitable for applications in magnetic field-sensitive environments, such as high-temperature components installed near electromagnetic induction equipment or precision instruments.

3. Application Products

Relying on its excellent comprehensive high-temperature performance, GH1016 alloy has been widely applied in multiple high-end manufacturing fields, and its core application products include:

• Aerospace Field: It is a key material for manufacturing high-temperature components of aero-engines, mainly used to produce combustion chamber casings, afterburner shells, and turbine outer rings. These components are in a harsh environment scoured by high-temperature gas for a long time, and the high-temperature strength and oxidation resistance of GH1016 can effectively ensure their safe and stable operation. Additionally, it is also used in the manufacturing of high-temperature structural parts for aerospace vehicles, such as heat-resistant components in the propulsion system.
• Energy Field: In thermal power plants, GH1016 is used to produce high-temperature superheater tubes, reheater tubes, and high-temperature headers of boilers. These components need to withstand the long-term erosion of high-temperature and high-pressure steam (with temperatures above 540℃ and pressures above 16MPa), and the excellent heat resistance and corrosion resistance of the alloy can significantly extend the service life of equipment while improving the thermal efficiency of power plants. In the nuclear energy field, it is applied to the manufacturing of high-temperature heat exchanger components in nuclear reactor systems, resisting the corrosion of high-temperature coolants and the influence of weak radiation.
• Chemical Industry Field: It is suitable for manufacturing high-temperature reactor liners, heating furnace tubes, and chemical process pipelines in the chemical industry. These components often work in environments with high temperatures (up to 900℃) and corrosive media (such as acidic gases and high-temperature molten salts), and the alloy’s resistance to high-temperature corrosion can ensure the continuous and stable operation of chemical production processes, reducing maintenance costs and production risks. Moreover, it is also used in the manufacturing of high-temperature cracking furnace tubes in the petrochemical industry.
• Other Fields: In the metallurgical industry, GH1016 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 automotive industry, it is applied to the manufacturing of special high-temperature exhaust components for high-performance vehicles (such as racing engine exhaust systems). In the medical industry, it is used in the core components of high-temperature sterilization equipment, ensuring the reliability and stability of the sterilization process.