This specification covers the requirements for six alloy compositions, four inspection classes, four radiographic quality grades and six classes of mechanical properties of high strength aluminum-alloy castings.
AMS-A-21180C stabilizes this document because it contains mature technology that is not expected to change and thus no further revisions are anticipated. AMS-A_21180C has been declared "STABILIZED" by AMS Committee D. This document was stabilized because this document contains mature technology that is not expected to change and thus no further revisions are anticipated. Previously this document was non-current. The last technical update of this document occurred in August, 2011. Users of this document should refer to the cognizant engineering organization for disposition of any issues with reports/certifications to this specification; including exceptions listed on the certification. NOTE: In many cases, the purchaser may represent a sub tier supplier and not the cognizant engineering organization. Users are alerted to typographical errors in the headings of the elongation column in Tables 3 and 4, where the square root symbol has been replaced, respectively, by a “?” and a □.