1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Sheet and strip with improved chemical milling capability 1,6 mm k a k 6 mmThe European Standard EN
2、 3999:2007 has the status of a British StandardICS 49.025.20; 77.150.10Aerospace series Aluminium alloy AL-P2024-T351 BRITISH STANDARDBS EN 3999:2007BS EN 3999:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 September 2007 BSI 2007ISBN
3、 978 0 580 53432 4Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard is the UK implementation of EN 3999:2007.The
4、UK participation in its preparation was entrusted by Technical Committee ACE/61, Metallic materials for aerospace purposes, to Panel ACE/61/-/24, Light alloys.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to includ
5、e all the necessary provisions of a EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3999 August 2007 ICS 77.150.10 English Version Aerospace series - Aluminium alloy AL-P2024-T351 - Sheet and strip with improved chemical milling capability 1,6 mm a 6 mm Srie arospatiale - Alliage daluminium AL-
6、P2024-T351 - Tles et bandes avec aptitude amliore lusinage chimique 1,6 mm a 6 mm Luft- und Raumfahrt - Aluminiumlegierung AL-P2024-T351 - Bleche und Bnder mit besserer Eignung zum chemischen Frsen 1,6 mm a 6 mm This European Standard was approved by CEN on 12 June 2006. CEN members are bound to com
7、ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Manage
8、ment Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as th
9、e official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovak
10、ia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reserved worldwide
11、 for CEN national Members. Ref. No. EN 3999:2007: E2 Contents Foreword3 Introduction .4 1 Scope 4 2 Normative references 4 EN 3999:20073 Foreword This document (EN 3999:2007) has been prepared by the AeroSpace and Defense Industries Association of Europe - Standardization (ASD-STAN). After enquiries
12、 and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national sta
13、ndard, either by publication of an identical text or by endorsement, at the latest by February 2008, and conflicting national standards shall be withdrawn at the latest by February 2008. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countrie
14、s are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
15、Sweden, Switzerland and the United Kingdom. EN 3999:20074 Introduction This standard is part of the series of EN metallic material standards 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 Sc
16、ope This standard specifies the requirements relating to: Aluminium alloy AL-P2024-T351 Sheet and strip with improved chemical milling capability 1,6 mm a 6 mm for aerospace application. This material is manufactured to a minimum residual stress requirement for chemical milling applications. 2 Norma
17、tive references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 4258, Aerospace series Metalli
18、c 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 Part 2: Sheet and strip 1)EN 4500-2, Aerospace series Metallic materials Rules for drafting and pre
19、sentation of material standards Part 2: Specific rules for aluminium, aluminium alloys and magnesium alloys 1)1)Published as ASD Prestandard at the date of publication of this standard. EN 3999:20075 1 Material designation Aluminium alloy AL-P2024- Others Element Si Fe Cu Mn Mg Cr Zn Ti Each Total A
20、l min. 3,8 0,30 1,2 2 Chemical composition % max. 0,50 0,50 4,9 0,9 1,8 0,10 0,25 0,15 0,05 0,15 Base 3 Method of melting 4.1 Form Sheet and strip 4.2 Method of production Rolled 4.3 Limit dimension(s) mm 1,6 a 6 5 Technical specification EN 4400-2 Delivery condition T351 6.1 Heat treatment 490 C 50
21、0 C / WQ 40 C + 0,5 % controlled stretched 3 % + = ambient / t 5 d 6.2 Delivery condition code U Use condition T351 7 Heat treatment Delivery condition Characteristics8.1 Test sample(s) See EN 4400-2. 8.2 Test piece(s) See EN 4400-2. 8.3 Heat treatment Use condition 9 Dimensions concerned mm 1,6 a 6
22、 10 Thickness of cladding on each face % 11 Direction of test piece LT 12 Temperature C Ambient13 Proof stress Rp0,2MPa 290 14 Strength RmMPa 445 15 Elongation A % A50 mm 14 16 T Reduction of area Z % 17 Hardness 18 Shear strength RcMPa 19 Bending k 20 Impact strength 21 Temperature C 22 Time h 23 S
23、tress aMPa 24 Elongation a % 25 Rupture stress RMPa26 C Elongation at rupture A % 27 Notes (see line 98) EN 3999:20076 See EN 4400-2.7 Dimensions (mm) 0,6 a 3,2 3,2 a 6 38 Intergranular corrosion Maximum depth of penetration (m) 150 200 44 External defects See EN 4400-2. 65 Chemical millability See
24、EN 4400-2. 7 Measurement of residual stress: h 4 mm See EN 4400-2.7 Electrical conductivity MS/m 17,5 (Typical value) or 125 (Typical value) 82 Batch uniformity 7 Hardness HB 16 per product 24 per batch 95 Marking inspection See EN 4400-2 96 Dimensional inspection See EN 4400-2 98 Notes 99 Typical u
25、se For parts manufactured by chemically milling through the thickness, necessitating control of residual stress EN 3999:20077 See EN 4400-2 100 Product qualification Qualification programme to be agreed between manufacturer and purchaser EN 3999:2007BS EN BSI389 Chiswick High RoadLondonW4 4AL3999:20
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