SUPERSEDING SPECIFICATION: The requirements of this specification are embodied in the latest issue of AMS 4117, ALUMINUM ALLOY BARS AND FLASH WELDED RINGS, 1.0Mg - 0.60Si - 0.28Cu - 0.20Cr (6061; -T6 -T651), Solution and Precipitation Heat Treated. The requirements of the latest issue of AMS 4117 shall be fulfilled whenever reference is made to this specification.