This specification has been declared "CANCELLED" by the Aerospace Materials Division, SAE, as of August 2012 and has been superseded by ASTM B 793. The requirements of the latest issue of ASTM B 793 shall be fulfilled whenever reference is made to the cancelled AMS-I-7068. By this action, this document will remain listed in the Numerical Section of the Index of Aerospace Materials Specifications, noting that it has been superseded by ASTM B 793.