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Product information

Grade: HAYNES 244
Origin: USA

HAYNES 244 is an age-hardenable nickel-chromium-molybdenum-tungsten low-expansion high-temperature alloy. It strengthens through the ordered Ni₂(Cr, Mo, W) precipitate phase, while tungsten enhances the thermal stability of the precipitates and reduces the thermal expansion coefficient. It combines excellent weldability with stable resistance to cyclic fatigue. It can maintain outstanding tensile and creep strength at temperatures up to 760°C for long periods, with balanced low thermal expansion, high-temperature oxidation resistance, and fluoride corrosion resistance, and it is highly adaptable to hot and cold forming processes. As a result, for decades it has been widely used in high-temperature applications that require dimensional stability, such as advanced gas turbine static components, aerospace engine sealing parts, high-temperature precision structural parts, thermal energy equipment expansion control components, and high-temperature fluorine chemical equipment.

Product parameter

Chemical Composition

Nickel (Ni) content makes up the remainder; it forms the base matrix of HAYNES 244 alloy, stabilizes the austenitic structure, and ensures the effect of age-hardening and high-temperature toughness.
Chromium (Cr) content ranges from 7.00% to 9.00%, forming an oxide protective film that improves oxidation and high-temperature corrosion resistance.
Molybdenum (Mo) content is 21.00%-24.00%, a key alloying element, which helps form an ordered strengthening phase, enhancing high-temperature strength and corrosion resistance.
Tungsten (W) content is 5.00%-7.00%, boosting the high-temperature stability of precipitates and effectively reducing the alloy's thermal expansion coefficient.
Carbon (C) content does not exceed 0.03%, ultra-low carbon design to prevent intergranular carbide formation and ensure weldability and age-hardening performance.
Iron (Fe) content does not exceed 2.50%, strictly controlling impurities to avoid harming the low thermal expansion characteristic.
Manganese (Mn) and Silicon (Si) do not exceed 0.50% and 0.40% respectively, optimizing the smelting process and controlling harmful impurity build-up.
Aluminum (Al) and Titanium (Ti) do not exceed 0.50% each, strictly limiting the upper limit to prevent the formation of harmful brittle phases.
Phosphorus (P) and Sulfur (S) do not exceed 0.015% each, keeping impurities tightly limited to ensure long-term high-temperature stability.

Mechanical Properties

Tensile Strength: 900 MPa, meaning the maximum pulling force the material can withstand.
Yield Strength: 620 MPa, the force at which the material starts to undergo permanent deformation.
Elongation: 28%, showing how much plastic deformation the material can undergo before breaking, supporting stable forming and welding processes.
Hardness: 310 HB, indicating the material's resistance to surface indentation; after age-hardening, strength increases and specialized tools are needed for processing.
Fatigue Strength: Stable under high-temperature cyclic loads and thermal cycling; low thermal expansion reduces thermal stress cracking.
Elastic Modulus: 208 GPa, showing the material's stiffness; high-temperature deformation is controllable, ensuring excellent dimensional stability for precision hot components.

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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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From steel procurement, processing, logistics, warehousing, 
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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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