自2012年3月起，SAE航空航天材料部已宣布本规范“取消”，并已被ASTM B 209和ASTM B 928取代。每当提及已取消的AMSM-QQ-A-250/9时，应充分满足最新版ASTM B 209和ASTM B 928的要求。通过这一行动，本文件仍将列在航空航天材料规范索引的数字部分，注意其已被ASTM B 209和ASTM B 928取代。本规范涵盖了5456铝合金板材和薄板的具体要求；通用要求见AMS-QQ-A-250。

This specification has been declared "CANCELLED" by the Aerospace Materials Division, SAE, as of March 2012 and has been superseded by ASTM B 209 and ASTM B 928. The requirements of the latest issue of ASTM B 209 and ASTM B 928 shall be fulfulled whenever reference is made to the cancelled AMSM-QQ-A-250/9. By this action, this document will remain listed in the Numerical Section of the Index of Aerospace Material Specifications, noting that is has been superseded by the ASTM B 209 and ASTM B 928.This specification covers the specific requirements for 5456 aluminum alloy plate and sheet; the general requirements are covered in AMS-QQ-A-250.