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Product information

Grade: UNS N07750
Origin: USA

UNS N07750 is an aluminum-titanium precipitation-hardened nickel-chromium superalloy. It gets its high strength from γ' intermetallic precipitates and also has excellent resistance to stress relaxation, oxidation, and chloride corrosion. It performs exceptionally well in long-term high-temperature strength below 700°C, has good low-temperature toughness, and is easy to bend and weld in the annealed state. This makes it a go-to alloy for high-temperature springs and fasteners. Over the years, it has been widely used in areas that face high-temperature, high-stress, and corrosive conditions, such as turbine springs in aerospace, high-temperature bolts in nuclear power, corrosion-resistant elastic parts in oil and gas wells, heat treatment tools, and aerospace sealing components.

Product parameter

Chemical Composition

Nickel (Ni) content makes up the balance and is the main component of the UNS N07750 alloy, stabilizing the austenitic matrix and providing toughness at both high and low temperatures as well as basic corrosion resistance.  
Chromium (Cr) content ranges from 14.00% to 17.00%, forming a dense chromium oxide layer that enhances high-temperature oxidation and sulfidation corrosion resistance.  
Iron (Fe) content ranges from 5.00% to 9.00%, optimizing cold and hot workability and balancing material costs.  
Titanium (Ti) content ranges from 2.25% to 2.75%, working with aluminum to form a γ' strengthening phase for high strength after aging.  
Aluminum (Al) content ranges from 0.40% to 1.00%, cooperating with titanium to precipitate intermetallic phases, significantly improving high-temperature tensile and yield strength.  
Niobium/Tantalum (Nb, Ta) content is 0.70%~1.20%, stabilizing grain boundaries and suppressing high-temperature intergranular cracking.  
Carbon (C) content does not exceed 0.08%, with trace carbon strengthening grain boundaries and low carbon avoiding welding intergranular corrosion.  
Boron (B) content ≤0.006%, refining grain boundaries and improving high-temperature creep performance.  
Manganese (Mn), Silicon (Si), Phosphorus (P), Sulfur (S), Cobalt (Co), and Copper (Cu) do not exceed 1.00%, 0.50%, 0.015%, 0.015%, 1.00%, and 0.50% respectively, keeping impurities strictly limited to ensure long-term high-temperature stability.

Mechanical Properties

Tensile Strength: 1200 MPa, showing the maximum tensile force the material can withstand.  
Yield Strength: 895 MPa, the force at which the material starts to deform permanently.  
Elongation: 18%, representing the amount of plastic deformation the material can undergo before breaking, ensuring stability in springs and fasteners.  
Hardness: 340 HB, indicating the material’s resistance to indentation by hard objects; after aging, the strength is high and special tools are needed for machining.  
Fatigue Strength: Excellent resistance to relaxation and fatigue cracking under high-temperature alternating loads in chlorinated environments.  
Elastic Modulus: 214 GPa, reflecting the material’s stiffness; it deforms little under high-temperature stress, keeping high-temperature elastic components dimensionally stable.

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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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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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