AMS4311G Aluminum Alloy, Rolled or Forged Rings, 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (7075-T7351, 7075-T7352), Solution Heat Treated, Mechanically Stress Relieved, and Precipitation Heat Treated

This specification covers an aluminum alloy in the form of rolled or forged rings up to 6 inches (152 mm), inclusive, in nominal thickness at the time of heat treatment and having an OD to wall thickness ratio of 10 or greater (see 8.6).