AMS4040N Aluminum Alloy, Sheet and Plate, Alclad 4.4Cu - 1.5Mg - 0.60Mn (2024-O with 1 ½% Alclad); Annealed

AMS4040N is being revised to delete the thin sheet portion of the document (0.008 to 0.187 inch) (Tables 2, 3, 4, 5, and 6) and supersede those requirements by the new AMS4461. Cautionary notes were added concerning this specification as it pertains to “thin” clad (1 ½%) for material over 0.187 inch due to potential for reduced corrosion resistance at reduced cladding thickness. This specification is not equivalent to historical AMS-QQ-A-250/5 applications for thicker gages.