Aerospace aluminum is a high strength aluminum alloy currently widely used in the aviation industry. Compared with ordinary aluminum alloys, aircraft aluminum alloys have higher requirements for strength, hardness, toughness, fatigue resistance and plasticity. 7xxx series and 2xxx series high-strength and toughness aluminum alloys are used in the largest amount.
2024 aluminum alloy has excellent strength and performs well under normal and low temperature conditions, making it suitable for applications requiring high strength. Under normal circumstances, after T3 state heat treatment, the hardness of 2024 aluminum alloy is about HB120. After more stringent T351 state or T4 state heat treatment, the hardness may be higher, reaching around HB140.
2219 aluminum alloy is a high-strength aluminum alloy with high yield strength and tensile strength. It is commonly used in manufacturing aerospace vehicles, automobile parts, building structures and other fields. 2219 aluminum alloy is typically produced in rod or aluminum plate.
7075 aluminum plate is an aluminum alloy with high hardness and high strength. 7075 aluminum plate is stress-relieved and will not deform or warp after processing. All oversized and ultra-thick 7075 aluminum plates have been ultrasonically detected to ensure that there are no blisters or impurities. 7075 aluminum plate has high thermal conductivity, which can shorten molding time and improve work efficiency.
7068 alloy is a 7000 series aluminium-zinc alloy registered with the US Aluminium Association and produced to AMS 4331 (chemical composition and mechanical properties) and AMS 2772 (heat treatment)
In the 1960s, the United States improved the 7075 aluminum alloy and developed the 7050 alloy, which is stronger, tougher and more resistant to stress corrosion. It was mainly used in the pressure-resistant structural parts of the F-18.
Subsequently, the 7150 alloy was developed and used to manufacture the upper wing structure of large civilian aircraft such as Boeing 757/767 and Airbus A301. In the 1980s, the United States successfully developed 7055 alloy based on 7150. Its strength is about 10% higher than 7150 and has higher overall performance. It is used for the upper wing skin and wing stringers of Boeing 777 passenger aircraft.
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