SAE AMS4307C
SAE AMS4307C Aluminum Alloy, Extrusions 6.4Zn - 2.4Mg - 2.2Cu - 0.12Zr (7150-T61511) Solution Heat Treated, Stress Relieved by Stretching, Straightened, and Precipitation Heat Treated (Stabilized: Apr 2017)
standard by SAE International, 04/24/2017