7075 belongs to Al-Zn-Mg-Cu based hard aluminum, 7075 Alloy in the late 1940s had been used in aircraft manufacturing, aviation is still widely used in industry ultrahigh strength and deformation aluminum Alloy. The feature is good plasticity after solution treatment, heat strengthened particularly effective at below 150 ℃ have high strength, and has particularly good low temperature strength; welding performance is poor; there is a tendency to stress corrosion cracking; subject package aluminum or Other protection process to use. Alloy two-stage aging can increase resistance to stress corrosion cracking. Plastic in the annealed and quenched just slightly lower than the same state of 2A12. Slightly better than the 7A04, static fatigue plate. Notch sensitivity, stress corrosion better than 7A04, which 7075T651 especially the top grade, known as the most aluminum Alloy excellent products, high strength, far better than mild steel. This Alloy has good mechanical properties and the anode reaction is typical of aviation with aluminum. Other used in the manufacture of aircraft structures and requirements of high strength, high corrosion resistance of high stress structural parts, such as aircraft, under the wing facing the wall panels, stringers, bulkheads, etc.. Good plasticity after solution treatment, heat strengthened particularly effective at below 150 ℃ high strength, and has particularly good low temperature strength, poor welding performance, there is a tendency to stress corrosion cracking, two-stage aging can improve resistance to SCC. 
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