1、AECMA STANDARD NORME AECMA AECMA NORM prEN 4278 Edition P 1 May 1998 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. +32) 2 775 81 1 O - Fax. (+32) 2 775 81 11 ICs: Descriptors: ENGLISH VERSION Aerospace series Aluminium alloy AL-P7 1 75-
2、 T7352 Hand and die forgings a I150 mm Srie arospatiale Alliage daluminium AL-P7175- T7352 Pices forges et pices matrices aI150mm Luft- und Raumfahrt Aluminiumlegierung AL-P7175- T7352 Freiform- und Gesenkschmiedestcke a I150 mm This “Aerospace Series“ Prestandard has been drawn up under the respons
3、ibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee fallo wing comment by the Member countries. Subsequent to the publication of this P
4、restandard, 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 Checkng Centre (NPS) and formal agreement of the Official Services of
5、the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX Edition approved for publicatio
6、n Comments should be sent within six months after the date of publication to C5 Chairman 1998-05-29 AECMA Gulledelle 94 B-I 200 BRUXELLES Mr Evetts aecma 1998 O Introduction This standard is part of the series of EN metallic material standards for aerospace applications. The general organization of
7、this series is described in EN 4258. This standard has been prepared in accordance with EN 4500-2. 1 Scope This standard specifies the requirements relating to: Aluminium alloy AL-P7175- T7352 Hand and die forgings al 150mm for aerospace applications. 2 Normative references This European Standard in
8、corporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this Eu
9、ropean Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 2082-3 Aerospace series - Aluminium alloy forging stock and forgings - Technical specification - Part 3: Pre-production and production forgings
10、EN 4258 Aerospace series - Metallic materials - General organization of standardization - Links between types of EN standards and their use 1) EN 4289 Aerospace series - Aluminium alloy AL-P7175- - Forging stock 1) EN 4500-2 Aerospace series - Metallic materials - Rules for drafting and presentation
11、 of material standards - Part 2: Specific rules for aluminium, aluminium alloys and magnesium alloys 1) 1 ) Published as AECMA Prestandard at the date of publication of this standard Previous page is blank STD-AECMA PREN 9278-ENGL 3998 m LOL23Ll 0014b55 375 m Page 4 prEN 4278: 1998 Chemical Element
12、composition % min. max. Method of melting Material designation Others AI si Fe Cu Mn Mg Cr Zn Ti Each Total - - - - - Base - 12 2.1 0,18 5,l 0,15 0.20 2,O 0,lO 2,9 028 6,1 0,10 0,05 0,15 - -r- Aluminium alloy AL-P7175- Form Method of production Limit dimension(s) mm Technical specification Hand and
13、die forgings Forged from forging stock EN 4289 ai 150 EN 2082-3 Delivery condition Heat treatment Delivery condition code Use condition Heat treatment T7352 460 “C I BI 480 “CI WQ 8s 80 “C 1 + 1% I cold compressed I 5 % + 100 “C I BI 120 “C I6 h 5 t 2 24 h + 170 “C I 81 182 “C I6 h I t I 18 h U T735
14、2 Delivery condition Characteristics Test sample(s) See EN 2082-3 Test piece(s) See EN 2082-3 Heat treatment Use condition Dimensions concerned mm a I 75 75 25mrn o= 75 % Roo, min. L - 7 Thickness L-T T- L - i I 171 t=20d - 3acture toughness (Klc) mm MPa Jm MPa dm MPa &n a I 75 2 29 2 26 2 23 75 as
15、100 2 28 2 25 2 23 100 a I 125 2 27 2 24 2 23 See EN 2082-3 External defects - 7 -I See EN 2082-3 See EN 2082-3 Electrical conductivity See EN 2082-3 or 130 (typical value) Hardness HB 6 I 20 per product A s 30 per batch - - - - I s-L See EN 2082-3 See EN 2082-3 1) The use of quench additives or hig
16、her quenchant temperature shall be subject to agreemen 2) If LT specimen cannot be cut, L specimen shall be used by agreement betweer between manufacturer and purchaser. manufacturer and purchaser. - Macrostructure 1-1 See EN 2082-3 nternal defects 1-1 See EN 2082-3 3atch uniformity Marking inspection Dimensional inspection Notes Typical use STD.AECMA PREN Li27-ENGL 1798 LOL231L 00Lqb57 ib Page 6 prEN 4278: 1998 Product qualification Qualification programme to be agreed between manufacturer and purchaser.
