GH4099高温合金

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Product information

Grade: GH4099
Steel Manufacturer: Haynes; SMC; ATI; VDM; Outokumpu; NYK; Jinri Tiefu, Fushun / Northeast Special Steel
GH4099 (GH99) alloy is a high-performance nickel-based superalloy with excellent high-temperature properties and process adaptability. It is widely used in the manufacturing of components such as aircraft engines and combustion chamber frames.
High-temperature properties
It can operate for a long time at a temperature of 900°C, and the maximum instantaneous operating temperature can reach 1000°C. Its high-aluminum-chromium formulation (Al 7.0 - 9.0%, Cr 26.5 - 29.5%) forms a dense oxide film (such as Cr₂O₃) at high temperatures, effectively resisting oxidation and corrosion.
Mechanical properties
Hardness: Higher hardness at room temperature, stable at 500°C to 800°C, and begins to significantly decrease above 900°C.
Shear strength: The shear strength at room temperature is ≥ 600 MPa, and remains at a high level at high temperatures.
Thermal stability: Excellent creep and thermal fatigue resistance in the range of 450°C to 700°C, with high reliability for repeated thermal cycling.
Process characteristics
Forming processing: Supports cold, hot processing and welding, and can be used without additional heat treatment.
Carburizing process: The depth of the carburized layer can reach 0.5 - 1.0 mm, and the mechanical properties can be further improved through heat treatment. Application scenario
It is mainly used for components such as the nozzle shell of the aeroengine and the combustion chamber frame that are subjected to high-frequency thermal cycles and high-temperature loads. It also has the advantages of lightweighting (reducing the weight of the engine) and long service life (doubling the service life).

Product parameter

Chemical composition 
GH4099 (GH99) is a high-alloyed nickel-based age-hardening sheet alloy. Its chemical properties are mainly reflected in aspects such as high-temperature stability, oxidation resistance, and processing adaptability. Chemical composition
This alloy is based on nickel (with the remainder being nickel), mainly containing elements such as chromium (17.00 - 20.00%), cobalt (5.00 - 8.00%), tungsten (5.00 - 7.00%), molybdenum (3.50 - 4.50%), aluminum (1.70 - 2.40%), and titanium (1.00 - 1.50%). Additionally, it also contains trace elements such as carbon (≤ 0.08%) and iron (≤ 2.00%). 

High temperature stability
It can be used for long-term service below 900℃, and the maximum instantaneous working temperature can reach 1000℃. It still maintains good creep resistance and thermal fatigue resistance at high temperatures, and the tensile strength at 700℃ still exceeds 600MPa. 

Antioxidant property
The chromium content (26.5% - 29.5%) promotes the formation of a dense oxide film on the surface (such as Cr₂O₃), effectively resisting oxidation at temperatures of 800 - 1000℃. Its antioxidant performance is superior to that of ordinary high-temperature alloys. Physical properties
Density: Approximately 8.47 g/cm³
Thermal conductivity: 100°C: 10.47 W/(m·C), 1000°C: 27.21 W/(m·C)
Electrical resistivity: 14°C: 1.373×10⁻⁶ Ω·m, remains stable at 1000°C
Processing adaptability
The structure is stable and suitable for cold and hot processing forming and welding. It is often produced by vacuum induction melting method and can be used to manufacture various shaped materials such as thin plates and wire rods.

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Shiyu Metal Material Technology Co., Ltd. is a collection of procurement, processing, agent, sales, logistics, warehousing in one of the enterprises, the company has a large-scale spot supply base in China, with domestic and foreign large steel mills and suppliers to maintain good relations of cooperation, with a full range of multi-channel procurement resources.
Shiyu Metal main products: nickel base alloy, Hastelloy, super austenitic stainless steel, duplex stainless steel, cobalt base alloy, pure nickel, titanium and titanium alloy, heat resistant, corrosion resistant alloy and other kinds of steel, a large number of product categories, can meet the size and thickness customization, prefabrication and other diversified needs.
The company has ISO9001 quality certification, the company's product standards include: the United States (UNS) ASTM /ASME, AMS, German DIN/EN, Japan (SUS) JIS and other standards supply, provide the original material certificate. We can supply according to the standards and technical requirements provided by customers to ensure that the goods and specifications are complete to meet the needs of various merchants. From raw materials to finished products, all go through three quality inspection to ensure the qualified rate of finished products. Shiyu Metal strives for perfection in every detail to ensure that the quality of products in different countries and regions around the world can meet international standards. Shiyu Metal has established a good strategic cooperative relationship with the world famous steel mills such as HAYNES, ATI, SPECIALMETALS, VDM, OUTOKUMPU, Japan Metallurgy, Nippon Steel, and Datong Special Steel.
The products supplied by Shiyu Metal are widely used in nuclear power, petrochemical, mechanical engineering, precision processing, aerospace, electronic instruments, medical equipment, automobile manufacturing, environmental protection, wind power application, seawater desalination, shipbuilding industry, paper making machinery, mining engineering, cement manufacturing, metallurgical manufacturing, corrosion resistant environment field, high temperature environment field, mold field, etc. It is a global high-quality supplier of special steel materials.
Shiyu Metal Material Technology Co., Ltd. is committed to the purchase, agent and sales of special steel, and has a perfect special steel sales management system and product quality supervision system. The company has been adhering to the "integrity, innovation, responsibility, win-win" business philosophy, adhere to the "quality first, customer first" service purpose, to provide customers with quality services and high-quality steel products. Shiyu Metal actively participates in the development of domestic steel industry ecology, and is willing to contribute to the development of national special steel.



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Shiyu Metal maintains good cooperative relations with medium and large steel mills and suppliers at home and abroad, 

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