1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication prEN 3999 Edition P 2 July 2002 Comments should be sent within six months after the date of publication to Material Domain PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION nh?#l Gulledelle 94 - 8-12
2、00 Brussels - Tel. + 32 2 775 81 10 - Fax. + 32 2 775 81 11 - www.aecma-stan.org ICs: Supersedes edition P 1 February 1995 Descriptors: ENGLISH VERSION Aerospace series Aluminium alloy AL-P2024- T351 Sheet and strip with improved chemical milling capability 1,6 mm I a 5 6 mm Srie arospatiale Luft- u
3、nd Raumfahrt T351 T351 Alliage daluminium AL-P2024- Tles et bandes avec aptitude amliore lusinage chimique 1,6 mm I al 6 mm Alum in um leg e rung AL-P2024- Bleche und Bnder mit besserer Eignung zum Chemisches Frsen 1,6 mm I al6 mm This Herospace Series“ Prestandard has been drawn up under the respon
4、sibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publicati
5、on of this Prestandard, 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 review by users and formal agreement of AECMA-STAN it will be submitted as a draft Europea
6、n Standard to CEN (European Committee for Standardization) for formal vote. AECMA-STAN 31 July 2002 Gulledelle 94 8-1200 BRUXELLES Copyright 2002 O by AECMA-STA, Page 2 prEN 3999: 2002 Blank page Page 3 prEN 3999: 2002 O Introduction This standard is part of the series of EN metallic material standa
7、rds for aerospace applications. The general organization of 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-P2024- T351 Sheet and strip with improved chemical milling c
8、apability 1,6 mm la16 mm for aerospace application. This material is manufactured to a minimum residual stress requirement for chemical milling applications. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative r
9、eferences 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 European Standard only when incorporated in it by amendment or revision. For undated references
10、the latest edition of the publication referred to applies. EN 4258 Aerospace series - Metallic materials - General organization of standardization - Links between types of EN standards and their use EN 4400-2 Aerospace series - Aluminium and aluminium alloy wrought products - Technical specification
11、 - Part 2: Sheet and strip 1) EN 4500-2 Aerospace series - Metallic materials - Rules for drafting and presentation 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 Pag
12、e 4 prEN 3999: 2002 1 Material designation Aluminium alloy AL-P2024- - 2 Chemical composition % Element min. max. Others Each Total si Fe Cu Mn Mg Cr Zn Ti . AI - - $8 030 1,2 - - - - - 0,50 0,50 4,9 0,9 1,8 0,lO 0,251 0,15 0,05 0,15 . Base - 3 I Method of melting I 4.1 Form 4.2 Method of production
13、 4.3 Limit dimension(s) mm 5 Technical specification Sheet and strip Rolled 1,6 I a I6 EN 4400-2 6.1 6.2 FIse condition Delivery condition T351 Heat treatment OCIIOOCIWQOC Delivery condition code U + 0,5 % I controlled stretched I3 % +O=ambientIt25d I T351 Heat treatment II I I Delivery condition 18
14、.1 I Test sample) Characteristics See EN 4400-2. 14 T w I See EN 4400-2. 18.2 I Test piece) I Strength R, MPa 2 445 Elongation A% brnm 2 14 Reductionofarea 2 % - Use condition I 18 19 mmensionsconcernedp 1 mrn I Shear strength & MPa - Bending k- - 1,6 5 a I6 I - Impact strength Temperature e OC Time
15、 h Stress ua MPa Elongation a% C I I I Thickness of cladding on I % I - lo I nach fare - - - - - I 11 I Direction of test piece I LT I 25 Rupturestress aR MPa - - Elongation at A % - 26 rupture 27 Notes (see line 98) - I I 12 I Temperature I e I “C I Ambient I 1 I I 13 I I Proof stress I RD0.2 I MPa
16、 I 2 290 Il I I I I I - I I 17 I Hardness Page 5 prEN 3999: 2002 Intergranular corrosion External defects Chemical millability Batch uniformity ? - - Marking inspection See EN 4400-2. Dimensions (mm) 0,6 5 a 5 3,2 3,2 a 5 6 Maximum depth of penetration (p) 5 150 5 200 See EN 4400-2. See EN 4400-2. D
17、imensional inspection Notes 7 - Typical use Measurement of residual stress: h 5 4 mm See EN 4400-2. Hardness HB 125 (Typical value) 6 5 16 per product A 5 24 per batch 7 I Electrical conductivity I Y I MSlm I 17.5 (Typical value) See EN 4400-2. See EN 4400-2. - For parts manufactured by chemically milling through the thickness, necessitating control o residual stress. Page 6 prEN 3999: 2002 Dduct qualification See EN 4400-2. ialification programme to be agreed between manufacturer and purchaser.
