1. The materials currently used in aluminum alloy frames are 7005 and 6061.
2. 7000 series mainly uses zinc as the main alloy, and the composition ratio reaches 6%. The 6000 series mainly uses magnesium and silicon as the main alloys, and the total composition ratio is low.
3. In terms of strength, 7005 is stronger but only slightly stronger. As can be seen from the table, yield strength (the strength of permanent bending deformation of aluminum) is only a little stronger than 6061.
4. All aluminum alloys used as frame materials are heat-treated T6
product name: 7005 Aluminum Sheet
Temper：T6, T651, T62, T652, T76, T74,T7451, T73, T7351
Surface: Mill finish, Bright finish, paper interleaved, one side film, both sides film.
7005 aluminum sheet is mainly used in aerospace, mold processing, machinery and equipment, fixtures, and so on. 7005 aluminum sheet, is often used for manufacturing welded structures which not only have high strength but also high fracture toughness such as truss, rod/bar and the container in vehicles; large-sized heat exchangers, some parts which cannot be performed solid fusion processing after welding; and also manufacturing of sports equipment for tennis rackets and baseball bats.
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