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SAE AMS4149 Revision E, May 1, 2016
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Aluminum Alloy, Die and Hand Forgings 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (7175-T74) Solution and Precipitation Heat Treated
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AIA/NAS Aerospace Standards

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 8.5).


These products have been used typically for parts requiring a combination of good strength and resistance to stresscorrosion cracking, but usage is not limited to such applications.