GH2747 high temperature alloy rod high strength structure stability oxidation resistance GH747.

GH2747 is a Fe-Ni-Cr based precipitation hardening high temperature alloy with excellent high temperature strength, corrosion resistance and good mechanical properties. It is widely used in aerospace, nuclear power, petrochemical and metallurgical industries.

GH2747 is a Fe-Ni-Cr based precipitation hardening deformation high temperature alloy, which is widely used in many fields for its excellent high temperature resistance, corrosion resistance, high strength and high toughness. This alloy is used in the solid solution state, and the long-term working temperature can reach 1100℃-1250℃, and the short-term use temperature can reach 130

Chemical composition
The main chemical components of GH2747 alloy include:

‌Nickel (Ni): 44-46%, giving the alloy excellent high temperature strength and corrosion resistance.
‌Chromium (Cr): 15-17%, enhancing oxidation resistance and forming a dense protective oxide film.
‌Aluminum (Al): 2.9-3.9%, improving the creep resistance of the material by forming a γ′ precipitation strengthening phase.
‌Other elements: such as molybdenum (Mo), titanium (Ti), cobalt (Co), tungsten (W), niobium (Nb), etc., further optimize the performance of the alloy.

Physical properties
The physical properties of GH2747 alloy rods include:

‌Density‌: 8.26 g/cm³‌.
‌Melting point‌: 1250℃ to 1350℃, can withstand extreme temperatures of 1300℃ for a short time‌.
‌Thermal conductivity‌: 10.5 - 24.3 W/(m·K)‌ in the range of 100~900℃.
‌Linear expansion coefficient‌: 17.07×10⁻⁶/K‌ at 20-800℃.
‌Elastic modulus‌: drops from 218 GPa to about 128 GPa in the range of 0~800℃‌.

Performance characteristics
High temperature strength: GH2747 can maintain good mechanical properties at high temperatures, and its tensile strength and yield strength remain at a high level under high temperature conditions.

Anti-oxidation and corrosion resistance: By increasing the chromium content and adding rare earth elements in appropriate amounts, the alloy's anti-oxidation properties at 1000℃-1300℃ are effectively improved.

Welding performance: GH2747 has good weldability, high strength and good toughness of the welded joint, and can be welded using various processes.

Processing performance: The alloy has good processing performance, is easy to form and weld, and can be hot forged, hot rolled, heat treated, etc.

Available forms

Plate, bar, seamless tube, wire, forging

We can also provide other parts according to customer requirements.

Hot-rolled and forged bars delivered in rolled or forged state, diameter 5-200 mm.

Seamless steel tubes delivered in cold-drawn or solid + pickled state, diameter 1-100 mm.

Application fields
GH2747 alloy rods are widely used in the following fields:

‌Aviation industry‌: used to manufacture high-temperature components such as combustion chambers and afterburners. Due to its excellent oxidation resistance and corrosion resistance, it can maintain a stable organizational structure in a high-temperature environment. ‌Petrochemical industry‌: suitable for reactors, heat exchangers and other equipment that require long-term heat and corrosion resistance. ‌Nuclear energy industry‌: used to manufacture high-temperature and radiation-resistant components to ensure the stability of materials in extreme environments. ‌Metallurgical industry‌: used for heat-resistant furnaces, furnace linings and thermocouple protection sleeves to meet the needs of creep resistance and corrosion resistance in high-temperature environments.