BS-EN-2070-7-1991.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS EN 2070-7:1991 Specification for Aluminium and aluminium alloy wrought products Technical specification Part 7: Wrought forging stock This European Standard EN 2070-7:1989 has the status of a British Standard. BS EN 2070-7:1991 This British Standard was published
2、 under the authority of the Board of BSI and comes into effect on 31 December 1990 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/61 Draft for comment 88/72194 DC ISBN 0 580 19075 7 Cooperating organizations The European Committee for Standardiz
3、ation, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardiso
4、imisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxemburgInspect
5、ion du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation Unit
6、ed KingdomBritish Standards Institution Amendments issued since publication Amd. No.Date of issueComments BS EN 2070-7:1991 BSI 01-2000i Contents Page Cooperating organizationsInside front cover National forewordii Brief history2 Text of EN 2070-73 National appendix AInside back cover National appen
7、dix BInside back cover BS EN 2070-7:1991 ii BSI 01-2000 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN 2070 “Aerospace series. Aluminium and aluminium alloy wrought products. Technica
8、l specification” Part 7 “Wrought forging stock”, published by the European Committee for Standardization (CEN). EN 2070-7 was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all the necessary provisions of a contrac
9、t. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, a
10、n inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2070-7 December 1989 UDC: 669.71.018.26-4:
11、620.1:629.7 Key words: Aircraft industry, rolled products, semi-finished products, aluminium, aluminium alloys, forging, die forging, dimensions, defects, tension tests English version Aerospace series Aluminium and aluminium alloy wrought products Technical specification Part 7: Wrought forging sto
12、ck Demi-produits corroys en aluminium et alliages daluminium Spcification technique Partie 7: Produits corroys destins la forge Luft- und Raumfahrt Halbzeug aus Aluminium und Aluminium-Knetlegierungen Technische Lieferbedingungen Teil 7: Schmiedevormaterial This European Standard was accepted by CEN
13、 on 1988-07-20. CEN members are bound to comply with the requirements of CEN 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 standa
14、rds may be obtained on application to the CEN Central Secretariat 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
15、to CEN Central Secretariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingd
16、om. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1989 Copyright reserved to all CEN members Ref. No. EN 2070-7:1989 E EN 2070-7:1989 BSI 01-2000 2 Brief history This European Stan
17、dard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has successively received the approval of the National Associations and the Official Services of the member cou
18、ntries of AECMA, prior to its presentation to CEN. According to the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain,
19、Sweden, Switzerland and United Kingdom. Contents Page Brief history2 1Scope and field of application3 2References3 3Batch size3 4Dimensions3 5External defects3 6Internal defects3 7Tensile test3 8Back end defect and peripheral coarse grain zone3 9Special tests4 10Marking4 Table 1 Summary of requireme
20、nts for wrought forging stock5 EN 2070-7:1989 BSI 01-20003 1 Scope and field of application The present standard specifies the particular requirements of wrought products for the production of forgings in aluminium and aluminium alloys. This standard shall be used in conjunction with EN 2070-1. 2 Re
21、ferences EN 2002-1, Aerospace series Test methods for metallic materials Part 1: Tensile tests at ambient temperature1). EN 2004-2, Aerospace series Test methods for aluminium and aluminium alloys products Part 2: Ultrasonic testing of plates, forgings and extrusions. EN 2070-1, Aerospace series Alu
22、minium and aluminium alloy wrought products Technical specification Part 1: General requirements. EN 2070-2, Aerospace series Aluminium and aluminium alloy wrought products Technical specification Part 2: Sheet, strip, formed profiles and plate. EN 2070-3, Aerospace series Aluminium and aluminium al
23、loy wrought products Technical specification Part 3: Bars and extrusions. EN 2715, Aerospace series Macrographic examination of aluminium and aluminium alloy forging stock Forging and wrought products1). 3 Batch size A batch of forging stock shall consist of material of the same cross-section from t
24、he same cast. A cast is defined in EN 2070-1. 4 Dimensions Dimensions and tolerances shall be agreed between the manufacturer and the purchaser and shall be specified on the order or on the inspection schedule. The frequency of examination adopted by the manufacturer shall be sufficient to permit hi
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