This specification has been declared "CANCELLED " by the Aerospace Materials Division, SAE, as of March 2009 and has been superseded by AMS4316. The requirements of the latest issue of AMS4316 shall be fulfilled whenever reference is made to the cancelled AMS-QQ-A-250/25. By this action, this document will remain listed in the Numerical Section of the Index of Aerospace Material Specifications, noting that it has been superseded by AMS4316. Cancelled specifications are available from SAE.