AECMA PREN 3345-1988 航空航天系列.铝合金(7150)溶液处理调质和人工老化(T6511)挤压棒材和板材 a或直径D小于或等于90 mm
Aerospace Series Aluminium Alloy (7150) Solution Treated, Water Quenched Controlled Stretched and Artificially Aged (T6511) Extruded Bar and Section (a or D) Less Than or Equal to 90 mm with Peripheral Coarse Grain Control Issue P 1
This «Aerospace Series. pre-standard has been drawn up under the responsibility of AECMA
(Association Européenne des Constructeurs de Matériel Aérospatial). It is published on green paper
for the needs of AECMA-Members. It has been technically approved by the experts of the concerned
AECMA Commission following comment b y the Member countries.