This specification covers an aluminum alloy in the form of bars and rods 0.500 in. (12.70 mm) and over in nominal diameter or least distance between parallel sides.
This specification covers an aluminum alloy in the form of bars and rods 0.500 inch (12.7 mm) to 8.000 inches (203.2 mm) in nominal diameter or least difference between parallel sides and up to 50 square inches (322.6 square centimeters) in cross-sectional area (see 8.7).
This specification covers the specific requirements for 7178 aluminum alloy plate and sheet material; the general requirements are covered in AMS-QQ-A-250.
This specification has been declared "NONCURRENT" by the Aerospace Materials Division, SAE, as of 10-1-83. It is recommended that this specification not be specified for new designs. See AMS 4845 for a recommended substitute casting alloy.