Aluminum alloys are mainly used as structural materials in aircraft, such as skins, frames, propellers, fuel tanks, wall panels and landing gear struts. Aluminum alloy thick plate is an important structural material in the modern aerospace industry. At present, the aluminum industry in developed countries has continuously developed new aluminum alloy thick plates with excellent performance.

7000 series aluminum alloys use Zn as the main additive element. The toughness of the aluminum alloy can be strengthened by heat treatment. After adding Mg element to the alloy, its hot deformation performance can be improved and the quenching range can be expanded. Changing the heat treatment conditions can improve the strength, weldability and corrosion resistance. However, the introduction of Mg element makes aluminum alloys have a serious tendency to stress corrosion. Therefore, 7000 series aluminum alloys belong to high-strength weldable alloys with high stress corrosion sensitivity. The Al/Zn/Mg/Cu alloy added with Cu element has higher strength and belongs to ultra-high-strength aluminum alloy. The yield strength is very close to the tensile strength. And the strength at high temperature is low, and it is often used for load-bearing structural parts where the operating temperature is lower than 120 °C. The excellent machinability, corrosion resistance and high toughness of 7000 series aluminum alloys make it the main structural material for aerospace. Internationally, it was recognized as early as the 1820s that the joint heat treatment after adding Mg and Zn to the aluminum alloy has a strengthening effect, but there is a serious problem of stress corrosion cracking. Molybdenum (Mo) improves the problem of stress corrosion cracking and realizes a large number of applications on carrier-based fighter jets. Especially in 1943, the 7075 alloy developed by the United States was first applied to the B-29 bomber, which brought revolutionary changes to the structure and performance of the aircraft. Subsequently, the 7000 series aluminum alloys were imitated and developed by various countries, and were widely used in high-end manufactured products.

DONGHENG ALUMINUM is a large-scale industrial and trade integration enterprise integrating R&D, production and sales. The company has more than 100 outstanding employees and is located in the beautiful Qingdao. Mainly engaged in the production and sales of aluminum sheets, foils and coils. The company's scale has been continuously expanded, and its sales network has covered more than 60 countries around the world. The company takes the initiative to undertake social responsibilities, and regards ecological environmental protection as the key task of development.