1、BRITISH STANDARD AEROSPACE SERIES BS EN 2681:2004 Aluminium alloy AL-P7010-T74 Hand and die forgings au 150 mm The European Standard EN 2681:2004 has the status of a British Standard ICS 49.025.20 BS EN 2681:2004 This British Standard was published under the authority of the Standards Policy and Str
2、ategy Committee on 12 January 2005 BSI 12 January 2005 ISBN 0 580 45273 5 National foreword This British Standard is the official English language version of EN 2681:2004. The UK participation in its preparation was entrusted to Technical Committee ACE/61/-/24, Light alloys, which has the responsibi
3、lity to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “Interna
4、tional Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a Brit
5、ish Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international an
6、d European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued s
7、ince publication Amd. No. Date Comments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2681 December 2004 ICS 49.025.20 English version Aerospace series - Aluminium alloy AL-P7010- - T74 - Hand and die forgings - a 150 mm Srie arospatiale - Alliage daluminium AL-P7010- - T74 - Pices forges et
8、matrices - a 150 mm Luft- und Raumfahrt - Aluminiumlegierung AL-P7010- - T74 - Freiform- und Gesenkschmiedestcke - a 150 mm This European Standard was approved by CEN on 15 July 2004. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
9、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 Central Secretariat or to any CEN member. This European Standard exists in three official versions
10、 (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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cypr
11、us, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROP
12、EN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2681:2004: EEN 2681:2004 (E) 2 Contents Page Foreword3 Introduction .4 1
13、 Scope 4 2 Normative references 4 EN 2681:2004 (E) 3 Foreword This document (EN 2681:2004) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard ha
14、s received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by J
15、une 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denm
16、ark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 2681:2004 (E) 4 Introduction This standard is part of the series of
17、 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 Scope This standard specifies the requirements relating to: Aluminium alloy AL-P7010- T74 Hand and die forgings
18、 a 150 mm for aerospace applications. 2 Normative 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 amendment
19、s) applies. EN 4258, Aerospace series Metallic materials General organization of standardization Links between types of EN standards and their use EN 4287, Aerospace series Aluminium alloy AL-P7010- Forging stock 1)EN 4400-7, Aerospace series Aluminium and aluminium- and magnesium- alloys Technical
20、specification Part 7: Aluminium alloy forgings 2)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 thi
21、s standard 2) In preparation at the date of publication of this standard EN 2681:2004 (E) 5 1 Material designation Aluminium alloy AL-P7010- Others Element Si Fe Cu Mn Mg Cr Ni Zn Zr Ti Each Total Al min. 1,5 2,1 5,7 0,10 2 Chemical composition % max. 0,12 0,15 2,0 0,10 2,6 0,05 0,05 6,7 0,16 0,06 0
22、,05 0,15 Base 3 Method of melting 4.1 Form Hand and die forgings 4.2 Method of production Forged from forging stock to EN 4287 4.3 Limit dimension(s) mm a 150 5 Technical specification EN 4400-7 Delivery condition T74 6.1 Heat treatment 470 C 480 C / WQ 60 C 80 C + 105 C 120 C / 8 h t 24 h a+ 170 C
23、180 C / 8 h t 16 h a6.2 Delivery condition code U Use condition T74 7 Heat treatment Delivery condition Characteristics 8.1 Test sample(s) See EN 4400-7. 8.2 Test piece(s) See EN 4400-7. 8.3 Heat treatment Use condition 9 Dimensions concerned mm a 75 75 a 100 100 a 125 125 a 150 10 Thickness of clad
24、ding on each face % 11 Direction of test piece L LT ST L LT ST L LT ST L LT ST 12 Temperature C Ambient Ambient Ambient Ambient 13 Proof stress R p0,2 MPa 430 420 410 425 410 400 420 400 390 410 390 380 14 Strength R m MPa 500 490 480 490 480 470 485 470 460 480 465 450 15 Elongation A % 7 4 4 7 4 3
25、 7 4 3 7 3 3 16 T Reduction of area Z % 17 Hardness 18 Shear strength R c MPa 19 Bending k 20 Impact strength 21 Temperature C 22 Time h 23 Stress a MPa 24 Elongation a % 25 Rupture stress R MPa 26 C Elongation at rupture A % 27 Notes (see line 98) a EN 2681:2004 (E) 6 See EN 4400-7. 22,3 MS/m bAcce
26、ptable if R p 0.2 LT R p 0.2 min. LT + 70 MPa, but if the purchaser also requires the stress corrosion test to be carried out (line 39), the results of this, if different, shall take precedence over those of this electrical conductivity test. 32 Electrical conductivity 7 22,3 MS/m bNot acceptable Se
27、e EN 4400-7. 2 The “capability clause“ may apply or the test shall be carried out to meet the requirements of line 32 as the reference method. The results of this stress corrosion test shall take precedence over those of the electrical conductivity test. 6 = 240 MPa 39 Stress corrosion 7 t 20 d See
28、EN 4400-7. Dimensions mm L - T MPa m T - L MPa m S - L MPa m a 75 29 26 23 75 a 100 28 25 23 40 Fracture toughness (K 1c) 7 100 a 150 27 24 23 44 External defects See EN 4400-7. 47 Notch / yield ratio R e / R p 0.2 See EN 4400-7. 51 Macrostructure See EN 4400-7. 61 Internal defects See EN 4400-7. Se
29、e EN 4400-7. 7 Electrical conductivity See EN 4400-7. or 140 (typical value) 82 Batch uniformity 7 Hardness HB 20 per product 30 per batch 95 Marking inspection See EN 4400-7. 96 Dimensional inspection See EN 4400-7. 98 Notes aArtificial ageing may be carried out using the following alternative sing
30、le stage method : heating to a temperature of 167 C 177 C at a rate not exceeding 20 C / h and soaking at this temperature for 10 h t 14 h. bIf the electrical conductivity acceptance criteria are not met, the material may be given additional artificial ageing at 170 C 180 C or re-heat treated accord
31、ing to line 6.1. In either case, the material shall be re-tested as a completely new batch. If all the requirements of this material standard are then met, the batch shall be accepted. 99 Typical use EN 2681:2004 (E) 7 100 Product qualification See EN 4400-7. Qualification programme to be agreed bet
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