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.

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AA7075鋁合金是一種冷處理鍛壓合金，強度高，遠勝于軟鋼。AA7075鋁合金是商用最強力合金之一。普通抗腐蝕性能、良好機械性能及陽極反應。細小晶粒使得深度鉆孔性能更好，工具耐磨性增強，螺紋滾制更與眾不同。其主要物理特性：抗拉強度524Mpa，0.2%屈服強度455Mpa：伸長率11%，彈性模量E/Gpa：71，硬度150HB，密度：2.810。
　　
　　特點：
　　
　　1.高強度可熱處理合金。
　　
　　2.良好機械性能。
　　
　　3.可使用性好。
　　
　　4.易于加工，耐磨性好。
　　
　　5.抗腐蝕性能、抗氧化性好。
　　
　　化學成分：
　　
　　硅Si：0.40
　　
　　鐵Fe：0.50
　　
　　銅Cu：1.2-2.0
　　
　　錳Mn：0.30
　　
　　鎂Mg：2.1-2.9
　　
　　鉻Cr：0.18-0.28
　　
　　鋅Zn：5.1-6.1
　　
　　鈦Ti：0.20
　　
　　鋁Al：余量
　　
　　其他：單個：0.05合計：0.15

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