AL-ZN-CU-MG ALUMINUM BASE ALLOYS AND METHODS OF MANUFACTURE AND USE

摘要

A rolled or forged Al—Zn—Cu—Mg aluminum-based alloy wrought product having a thickness from 2 to 10 inches. The product has been treated by solution heat-treatment, quenching and aging, and the product comprises (in weight-%): Zn 6.2-7.2, Mg 1.5-2.4, Cu 1.7-2.1. Fe 0-0.13, Si 0-0.10, Ti 0-0.06, Zr 0.06-0.13, Cr 0-0.04, Mn 0-0.04, Mn 0-0.04, impurities and other incidental elements ≦̸0.05 each. Alloys per se and aircraft and aerospace uses, as well as methods of making products are also disclosed.