1、A. E,C . M. A. STAN DAR D NORME A.E.C.M.A. A.E.C.M.A. NORM Edition approved for publication Comments should be sent within six months after the date of publication decision 88, Bd. Malesherbes 17th October I988 A.E.C.M.A. 75008 PARIS - FRANCE prEN 3550 Issue P 1 October 1988 C5 Chairman J. ODORICO E
2、DITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88. boulevard Malesherbes, 75008 PARIS -TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Aluminium alloy (2024) Solution treated, stretched and artificially aged (T8511) Extruded bars and sections (a or D) pre-
3、standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approvedby the experts of the concerned AECMA Commission following comment by the Membe
4、r countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (
5、NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. aecma 1988 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under lice
6、nse with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,- AECMA _ PREN3550 - &e aI &0123& OOObO&2 3 prEN 3550 Page 3 S Scope arid field of application This standard specifies fer the aerospace appl fiation, the inechanical prcperties for extruded bar and secti
7、titi, (a or D) ) mm - 400 u - - 385 - 400 Rpsz MPa *I Proof Stress - 2 2 Strength MPa *I - 440 - 455 - 455 Elongation A % - 4 - 5 - 4 u - r - Reduction of area % - iardness IH8 I - I 130 (for information) ending npact IK I I Temperature I - e I OC I Timo I t I h I - Elongation I a I % I - Elongation
8、 atrupture I A I % I ES ee Ilne 98 I *I 1 MPa= 1 N/mrn2 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN3550 L03 20 The rules governing the d
9、esignation of semi-finished products are indicated in standard EN 2600. When the codified designation is used, the identification code shall be as follows : 1EN 3550 U XX - Haterial standard number I-Letter I I code (see 6.2) Appropriate dimensional standard code (see 5.3) .Data concerning dimension (see EN 2600) Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
