Introduced by Alcoa in 1943, alloy 7075 has been the standard workhorse 7XXX series alloy within the
aerospace industry ever since. It was the first successful Al-Zn-Mg-Cu high strength alloy using the
beneficial effects of the alloying addition of chromium to develop good stress-corrosion cracking
resistance in sheet products. Although other 7XXX alloys have since been developed with improved
specific properties, alloy 7075 remains the baseline with a good balance of properties required for
aerospace applications.
Alloy 7075 is available in bare and alclad sheet and plate product forms in the annealed state as well
as several tempers of the T6, T73 and T76 types.

Alloy 7075 sheet and plate products have application throughout aircraft and aerospace structures
where a combination of high strength with moderate toughness and corrosion resistance are required.
Typical applications are alclad skin sheet, structural plate components up to 4 inches in thickness and
general aluminum aerospace applications.

AA7075铝合金是一种冷处理锻压合金，强度高，远胜于软钢。AA7075铝合金是商用最强力合金之一。普通抗腐蚀性能、良好机械性能及阳极反应。细小晶粒使得深度钻孔性能更好，工具耐磨性增强，螺纹滚制更与众不同。其主要物理特性：抗拉强度524Mpa，0.2%屈服强度455Mpa：伸长率11%，弹性模量E/Gpa：71，硬度150HB，密度：2.810。
　　
　　特点：
　　
　　1.高强度可热处理合金。
　　
　　2.良好机械性能。
　　
　　3.可使用性好。
　　
　　4.易于加工，耐磨性好。
　　
　　5.抗腐蚀性能、抗氧化性好。
　　
　　化学成分：
　　
　　硅Si：0.40
　　
　　铁Fe：0.50
　　
　　铜Cu：1.2-2.0
　　
　　锰Mn：0.30
　　
　　镁Mg：2.1-2.9
　　
　　铬Cr：0.18-0.28
　　
　　锌Zn：5.1-6.1
　　
　　钛Ti：0.20
　　
　　铝Al：余量
　　
　　其他：单个：0.05合计：0.15