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Product information

Grade: HAYNES 75
Origin: USA

HAYNES 75 is a solid-solution strengthened nickel-chromium high-temperature alloy, with titanium added to stabilize its structure. It has excellent weldability and outstanding high-temperature oxidation resistance, and its oxide layer adheres well under both hot and cold cycles. It can maintain stable mechanical properties continuously below 950°C and shows balanced resistance to high-temperature oxidation and carburization corrosion, with good adaptability for hot and cold forming processes. Because of these properties, for decades it has been widely used in applications requiring medium to high-temperature oxidation resistance, such as aircraft engine exhaust parts, heat treatment radiant tubes, industrial heating fixtures, gas turbine combustion chamber components, and high-temperature furnace linings.

Product parameter

Chemical composition

The nickel (Ni) content is the remainder and serves as the base matrix for HAYNES 75 alloy, stabilizing the austenitic structure and providing fundamental corrosion resistance and high-temperature toughness.
Chromium (Cr) content between 18.00%~21.00% forms a dense oxide film that enhances oxidation and sulfur corrosion resistance.
Iron (Fe) content does not exceed 5.00%, with reasonable control of impurity elements, ensuring machining plasticity and maintaining high-temperature corrosion resistance.
Titanium (Ti) content 0.20%~0.60%, fixes carbon elements, inhibits intergranular carbide precipitation, and improves welding performance.
Carbon (C) content 0.08%~0.15%, appropriate carbon reinforcement grain boundaries, enhancing sustained strength at medium temperatures.
Manganese (Mn) content does not exceed 1.00%, improving hot workability and reducing the risk of hot cracking.
Silicon (Si) content does not exceed 1.00%, melted and deoxidized, helping to enhance antioxidant properties.
Aluminum (Al) content does not exceed 0.40%, strictly controlled upper limit, and harmful brittleness phase formation is avoided.
Phosphorus (P) and sulfur (S) content do not exceed 0.040% and 0.020% respectively, with strict impurity limits to ensure stability during welding and high-temperature conditions.

Mechanical properties

Tensile strength: 640 MPa, indicating the maximum tensile force the material can withstand.
Yield strength: 235 MPa, the force at which the material begins to undergo permanent deformation.
Elongation: 30%, indicating the amount of plastic deformation the material can undergo before stretching and fracture, with stable and controllable forming and welding processes.
Hardness: 195 HB, which is the material's ability to resist hard objects pressing into its surface, with good annealed machinability.
Fatigue strength: Stable fatigue life under high-temperature cycling heat loads and alternating oxidation atmospheres, resistant to peeling and cracking.
Elastic modulus: 221 GPa, reflecting material stiffness, minimal deformation under high-temperature stress, and excellent dimensional stability of high-temperature furnace components.


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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, 

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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