GH6783

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Product information

Grade: GH6783
Steel Manufacturer: Haynes; SMC; ATI; VDM; Outokumpu; NYK; Jinri Tiefu, Fushun / Northeast Special Steel
GH6783 is a Co-Ni-Fe based precipitation hardening ferromagnetic oxidation-resistant low expansion deformation alloy with the following core properties:
Physical Properties
‌Density‌: 7.81 g/cm³ ‌
‌Thermal Conductivity‌: 11.4-24.2 W/(m·K) within the range of 100-760℃ ‌
‌Elastic Modulus‌: 177.3 GPa at 20℃, remains 160.7 GPa at 600℃, and reaches 152.5 GPa at 700℃ ‌
‌Thermal Expansion Coefficient‌: 13.5×10⁻⁶/℃ on average from 20 to 1000℃ ‌
Mechanical Properties
‌Room Temperature Strength‌: Tensile strength ≥ 1100 MPa, yield strength ≥ 800 MPa ‌
‌High Temperature Strength‌: Tensile strength ≥ 650 MPa at 850℃, yield strength ≥ 550 MPa, elongation > 15% ‌
‌Creep Resistance‌: Fracture life exceeds 200 hours at 850℃/300 MPa, steady-state creep rate < 1×10⁻⁷ s⁻¹ ‌
Antioxidation and Corrosion Resistance
‌Antioxidation Temperature‌: Completely oxidized at 750℃, forming a composite oxide film of Al₂O₃ + Cr₂O₃ on the surface ‌
‌Corrosion Resistance‌: Stable in strong acid/strong base environments, with enhanced anti-sulfurization corrosion ability by more than 3 times compared to Inconel 718 in H₂S gas environment ‌
Application Characteristics
‌Processing Properties‌: Forging/rolling temperature range 1130-950℃, cold working reduction rate up to 25%-35% ‌
‌Weldability‌: Recommended for laser welding or electron beam welding to ensure high-temperature stability ‌
This alloy is optimized through multi-stage aging treatment (solution + stepped aging) to optimize the distribution of strengthening phases, balancing high-temperature strength and plasticity, and is suitable for aerospace engine components and chemical corrosion-resistant equipment.

Product parameter

Chemical properties
The chemical composition of GH6783 superalloy is as follows:
‌Carbon (C): ≤ 0.03%
‌Silicon (Si): ≤ 0.5%
‌Manganese (Mn): ≤ 0.5%
‌Sulfur (S): ≤ 0.005%
‌Chromium (Cr): 2.5% - 3.5%
‌Nickel (Ni): 26% - 30%
‌Molybdenum (Mo): 7% - 9%
‌Cobalt (Co): remainder (matrix element)
‌Copper (Cu): ≤ 0.5%
‌Iron (Fe): 24% - 27%
‌Titanium (Nb): 2.5% - 3.5%
‌Boron (B): 0.003% - 0.012%
‌Titanium (Ti): ≤ 0.4%
‌Aluminum (Al): 5% - 6%
This alloy is based on nickel, and the addition of elements such as chromium, molybdenum, and cobalt enhances its high-temperature oxidation resistance and mechanical properties. At the same time, the addition of aluminum and niobium forms dispersed strengthening phases, further enhancing its high-temperature stability.

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COMPANY PROFILE




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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SERVICE

From steel procurement, processing, logistics, warehousing, 
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RESOURCE

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

and has established good strategic cooperative relations with world famous steel mills such as the United States, Germany, Finland and Jap.




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Shiyu Metal set procurement, processing, agency, sales, logistics, 

warehousing in one, can provide customers with steel products procurement, processing, logistics and other one-stop services.




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Shiyu Metal operates a wide range of steel products, can provide customers with product size and width customization, prefabrication and other services, perfect product quality supervision system, to ensure high standards of product quality, high quality.