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Time:2025-07-03
In the field of modern aviation and industry, aluminum alloys are well-deserved star materials, and 7075 and 2024 aluminum alloys are the best among them. With their unique properties, they have gradually expanded from the aviation field at the beginning of their birth to many industries, profoundly affecting the modern industrial pattern.
At the beginning of the 20th century, the aviation industry flourished, placing strict demands on the strength, weight and durability of materials. In 1931, the Aluminum Company of America (Alcoa) developed 2024 alloy, which uses copper as the main alloying element (containing 3.8%-4.9% copper), combined with magnesium (0.5%-1.2%) and manganese (0.3%-0.9%), etc.
It has excellent strength-to-weight ratio, good fatigue resistance and processing performance. It quickly became the darling of the aviation industry and was widely used in aircraft skins, wing structures, etc., replacing 2017-T4 alloy and laying the foundation for improving aircraft performance.
In 1943, Alcoa launched 7075 aluminum alloy, which belongs to the Al-Zn-Mg-Cu series of super-hard aluminum. Zinc is the main alloying element (5.1%-6.1%), combined with magnesium (2.1%-2.9%), chromium (0.18%-0.28%) and copper (1.2%-2.0%). After heat treatment, the strength is far higher than carbon steel, and it has good thermal conductivity, which can shorten the forming time and improve work efficiency.
Initially, it was mainly used to manufacture large bombers and fighters during World War II, such as the B-29 bomber, and became an important milestone in the development of 7xxx series aluminum alloys.
In the subsequent development, 2024 aluminum alloy has been continuously optimized. By adjusting the heat treatment process, multiple states such as 2024-O, 2024-T3, and 2024-T4 have been produced.
7075 aluminum alloy has also undergone innovation. Although the early 7075-T6 state has high strength, it has low damage tolerance, poor corrosion resistance and fracture toughness, which limits its application in thick and large-section structures. To this end, researchers have developed 7075-T73, T76, T74, T651 and other states to optimize performance.
In the automotive industry, the demand for lightweight makes them popular. 2024 aluminum alloy is used to manufacture automobile wheels. Its high strength ensures safety, and its good processing performance enables complex styling design. 7075 aluminum for sale is widely used in automotive structural parts, such as bumpers, support arm forgings, etc., to improve automobile handling and fuel economy.
They also show their prowess in the field of consumer electronics. Samsung Note 5 and S6 edge + use 7075 alloy to create ultra-thin bodies and improve stability. Since the iPhone 6S, Apple has used 7075 alloy sheets to manufacture the body to solve the problem of easy bending of the previous generation. Until the iPhone 14, it still uses "aerospace aluminum sheets".
2024 aluminum alloy is also used in the internal structural parts of some high-end electronic products, using its good heat dissipation and strength to ensure the stable operation of the equipment.
In the machinery manufacturing and mold processing industry, 7075 aluminum for sale is used to manufacture molds, precision mechanical parts, etc. with its high strength, good cutting and polishing properties to meet the needs of high precision and high wear resistance.
