The 7075 is a Al-Zn-Mg-Cu alloy, Alcoa Corp R & D, post World War two aircraft have been using this alloy forgings in T6 or T73 state of application, its composition: 0.40 Si, 0.50 Fe, 0.30 Mn, 1.2~2.0 Cu, 2.1~2.9 Mg, 0.18~0.28 Cr, 5.1~6.1 Zn, 0.20 Ti, Cr+Ti maximum in 0.25, each of the 0.05 other impurities, a total of 0.15, the rest is Al. The 7075 alloy is the highest strength in the automotive industry forgings, and its corrosion resistance is better than that of the 2024 alloy in the state of T6 or T73. It is also higher than that of the 2014 alloy, but it is not as good as that of the 6082 alloy. The lowest mechanical properties of the alloy (T5/T73): Rm 530/455 N/mm - tensile strength and yield strength of Rp. 470/385 N/mm - A 8/6, elongation%, the hardness of HBW. Bush / 145/130. The alloy has been widely used in the aviation industry, and the automobile industry uses it to forge die forgings with very high load, but the amount is less.
Specification of 7075 aluminum alloy forgings
Available Temper: H112、O、F、T3、T4、T5、T6、T7、T8、T9、T651、T851、T451、T351
Maximum single unit weight: 800kg
Maximum diameter with quenching:2000mm
Maximum diameter without quenching: 2800mm