7020 aluminum alloy

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Product information

Model: 7020
Availability: Customizable 
7020 aluminum alloy (Al-Zn-Mg alloy) is a medium-high strength aluminum alloy, possessing the following properties:
Mechanical properties
‌Strength‌: High tensile strength and yield strength, suitable for structural components subjected to large loads ‌
‌Welding properties‌: Can be connected through conventional welding methods (such as TIG welding, MIG welding), with minimal welding deformation ‌
‌Corrosion resistance‌: Forms an oxide film on the surface in humid environments, possessing certain anti-corrosion capabilities ‌
Processing properties
‌Malleability‌: Can undergo plastic deformation at room temperature, suitable for processing of complex shapes ‌
‌Heat treatment‌: Can be further enhanced in terms of strength and hardness through heat treatment ‌
‌Processability‌: Suitable for cold processing (such as milling, stretching) and hot processing (such as die casting) ‌
Main applications
Widely used in aerospace structural components (such as aircraft skins, frames), high-speed train car bodies, and high corrosion-resistant industrial products.

Product parameter

Chemical composition 
The main chemical components of 7020 aluminum alloy include aluminum (in excess), zinc (4.0-5.0%), magnesium (1.0-1.4%), manganese (0.05-0.50%), chromium (0.10-0.35%), zirconium (0.08-0.20%), and trace elements such as silicon, iron, and copper, which are within the specified limits.
‌Detailed Chemical Composition of 7020 Aluminum Alloy‌
7020 aluminum alloy is a medium-high strength Al-Zn-Mg alloy. Its chemical composition is designed to balance strength, welding performance, and corrosion resistance. According to authoritative sources, the specific composition range is as follows:‌
‌Main elements‌
Aluminum (Al): in excess (the highest proportion)
Zinc (Zn): 4.0-5.0% (core strengthening element)
Magnesium (Mg): 1.0-1.4% (forms the MgZn₂ strengthening phase with Zn)
Zirconium (Zr): 0.08-0.20% (finely grinds grains, enhancing corrosion resistance)
‌Trace added elements‌.
Manganese (Mn): 0.05-0.50%
Chromium (Cr): 0.10-0.35%
Silicon (Si): ≤0.35%
Iron (Fe): ≤0.40%
Copper (Cu): ≤0.20%
‌Limits on impurities‌.
Other unspecified elements: each ≤0.05%, total ≤0.15% 
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