7a09 Aluminum Round Bar

7A09 aluminum bar belongs to the Al-Zn-Mg-Cu series of super-duralumin. This alloy is an ultra-high-strength deformed aluminum alloy that has been used in the aircraft industry in the late 1940s and is still widely used in the aviation industry. It is characterized by good plasticity after solution treatment, particularly good heat treatment strengthening effect, high strength below 150 ℃, and particularly good low temperature strength; poor welding performance; stress corrosion cracking tendency; need to be coated with aluminum or other Protection processing use. Two-stage aging can improve the alloy's ability to resist stress corrosion cracking. The plasticity in the annealed and just-quenched state is slightly lower than 2A12 in the same state and slightly better than 7A04. The static fatigue of the sheet is sensitive to notches, and the stress corrosion performance is better than 7A04.


 
7A09 aluminum bars are mainly used to manufacture aircraft structures and other high-stress structural parts that require high strength and corrosion resistance, such as aircraft upper and lower wing panels, stringers, etc. After solution treatment, the plasticity is good, the heat treatment strengthening effect is good, it has good strength below 150 degrees, and has particularly good low temperature strength, poor welding performance, and stress corrosion cracking tendency. It is also widely used in mold processing, mechanical equipment, tooling and fixtures, aerospace industry, blow molding (bottle) molds, ultrasonic plastic welding molds, golf heads, shoe molds, paper molds, foam molding molds, dewaxing molds, machinery Equipment for making high-end aluminum alloy bicycle frames. It will be used as the body material of the smartphone OPPO N3 for the first time in 2014.

Author: Frank

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