7175 aluminum alloy

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Product information

Model: 7175
Status: Customizable 
7175 aluminum alloy is a high-strength deformation aluminum alloy with excellent comprehensive properties, and is widely used in aerospace, marine engineering and military fields. Here are its main performance characteristics:
Mechanical properties
High strength: T74 state tensile strength ≥ 520 MPa, T736 state tensile strength ≥ 480 MPa
High toughness: Fracture toughness KIC ≥ 35 MPa·m¹/², impact energy remains ≥ 35 J at -196°C low temperature
Fatigue performance: 10⁷ cycle fatigue strength ≥ 240 MPa (R = 0.1)
Corrosion resistance
Resistance to stress corrosion cracking: KISCC ≥ 28 MPa·m¹, annual corrosion rate in 5% NaCl salt spray is ≤ 0.01 mm/a
Resistance to acid and alkali environments: Can maintain a service life of over 20 years within the pH range of 2-12
Alloy composition and strengthening mechanism
Main components: Zn (5.5-6.8%), Mg (2.0-2.8%), Cu (1.2-1.8%), and a small amount of Ag (0.1-0.4%) is added to optimize the distribution of precipitated phases
Strengthening phases: Nano-sized η' phase (MgZn₂, size 20-40 nm) and T phase (Al₂Mg₃Zn₃) significantly enhance strength 
Heat treatment process 
Typical process: 470℃ solution treatment + 135℃/16h single-stage aging or double-stage aging (110℃ + 160℃)  
Thermal stability: The strength retention rate at 150℃ is ≥ 85%  
Application fields  
Aerospace: Aircraft wing beams, unmanned aircraft frames (weight reduction 25%)  
Marine engineering: Anode brackets of deep-sea drilling platforms, inner linings of petrochemical storage tanks  
Military industry: Anti-buckling layers of armored vehicles  
Comparative advantages  
Compared with 7075-T6, the fracture toughness of 7175 increases by 40%, and the fatigue crack propagation rate decreases by 50% 
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Product parameter

Chemical composition

The chemical composition of 7175 aluminum alloy is as follows (ranges of main element contents):
‌Aluminum (Al): 100%
‌Silicon (Si): ≤0.15% (some sources indicate 0.30-0.6%, be aware of the differences)
‌Iron (Fe): ≤0.20% (some sources are 0.10-0.30%)
‌Copper (Cu): 1.2-2.0% (some sources require ≤0.10%, refer to the mainstream standards)
‌Manganese (Mn): ≤0.10%
‌Magnesium (Mg): 2.1-2.9% (some sources are 0.35-0.6%, distinguish the states)
‌Chromium (Cr): 0.18-0.28% (some sources ≤0.05%)
‌Zinc (Zn): 5.1-6.1% (high toughness version can reach 5.5-6.5%)
‌Titanium (Ti): ≤0.10%
‌Special added elements (some high-performance versions):
Zirconium (Zr): 0.10-0.15%
Silver (Ag): 0.2-0.4% 
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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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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.