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SAE AMS 4331B-2025
Aluminum Alloy Extrusions, 7.8Zn - 2.6Mg - 2.0Cu - 0.10Zr - (7068-T6511), Solution Heat Treated, Stress Relieved, and Precipitation Heat Treated
This specification covers an aluminum alloy in the form of extruded bars, rods, shapes (profiles), and tubing 0.250 to 3.000 inches (6.35 to 76.20 mm), inclusive, in nominal diameter, least thickness, or nominal wall thickness (see 8.5 ).
Society of Automotive Engineers [sae]