7A09 aluminum bar belongs to al-zn-mg-cu superhard aluminum, which has been used in the aircraft manufacturing industry since the late 1940s and is still widely used in the aviation industry today.It is characterized by good plasticity after solid solution treatment, especially good heat treatment strengthening effect, high strength below 150℃, and especially good low-temperature strength.Poor welding performance;There is a tendency of stress corrosion cracking;To be used with aluminum coating or other protective treatment.The resistance to stress corrosion cracking can be improved by double aging.The plasticity in annealed and just quenched state is slightly lower than 2A12 in the same state. It is slightly better than 7A04 in the same state.

USES:

7A09 aluminum bar is mainly used to manufacture aircraft structures and other high-stress structures requiring high strength and corrosion resistance, such as aircraft, lower wing facing panels, truss bars, etc.Good plasticity after solid solution treatment, good heat treatment strengthening effect, good strength below 150 degrees, and has particularly good low temperature strength, poor welding performance, a tendency to stress corrosion cracking.Also widely used in mold processing, mechanical equipment, fixtures, aerospace industry, blow molding (bottle) mold, ultrasonic plastic welding mold, golf head, shoe mold, paper mold, foam molding mold, dewaxing mold, mechanical equipment, used in the production of high-end aluminum alloy bicycle frame.In 2014, it will be used for the first time as the body material of the smartphone OPPO N3.