Historical
SAE AMS 4311E-2007 (SAE AMS4311E-2007)
Aluminum Alloy, Rolled or Forged Rings 5.6Zn 2.5Mg 1.6Cu 0.23Cr (7075-T7351, 7075-T352) Solution Heat Treated, Mechanically Stress Relieved, and Precipitation Heat Treated
This specification covers an aluminum alloy in the form of rolled or forged rings. These rings have been used typically for applications requiring a combination of high strength, resistance to stress-corrosion cracking, and good stability during machining, but usage is not limited to such applications. Rings covered by this specification are classified by type of mechanical stress relief as follows: Type 1 - Stress-relieved by stretching (7075-T7351); and Type II - Stress-relieved by compression (7075-T7352). Either type may be supplied, unless a specific type is ordered.
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Society of Automotive Engineers [sae]