This standard is initially published on green paper for the needs of AECMA-Members (Association Europeenne des Constructeurs de Matdriel Adrospatial). it has been technically approved by the experts of the concerned AECMA Commission following comment by the manufacturers of the Member countries.
AECMA PREN 2721-1986 history
1986AECMA PREN 2721-1986 Aerospace Series Aluminum Alloy Al-C12-T4 Sand Castings Issue P 1