Aluminum Alloy, Die and Hand Forgings, 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (7175-T74), Solution and Precipitation Heat Treated AMS4149

This specification covers an aluminum alloy in the form of die and hand forgings 6.000 inches (152.00 mm) and under in nominal thickness at time of heat treatment (see 8.6).