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.BSEN2070-7:1991 This British Standard was published un
2、der the authority ofthe Board of BSI and comes intoeffect on 31December1990 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 Standardization,
3、under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimi
4、sliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxemburg Ins
5、pection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalis
6、ation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date of issue CommentsBSEN2070-7:1991 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN 2070-7 3 National appendix A Inside back cove
7、r National appendix B Inside back coverBSEN2070-7:1991 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 EN2070“Aerospace series. Aluminium and aluminium alloy wrought produc
8、ts. Technical specification” Part7 “Wrought forging stock”, published by the European Committee for Standardization (CEN). EN2070-7was 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
9、a contract. 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, pagesiandii, theEN title page, pages2to6,
10、 an 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 st
12、ock 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 CE
13、N on1988-07-20. 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. EN2070-7:1989 EEN2070-7:1989 BSI 01-2000 2 Brief history This European Standar
17、d 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 countr
18、ies 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, Swe
19、den, Switzerland and United Kingdom. Contents Page Brief history 2 1 Scope and field of application 3 2 References 3 3 Batch size 3 4 Dimensions 3 5 External defects 3 6 Internal defects 3 7 Tensile test 3 8 Back end defect and peripheral coarse grain zone 3 9 Special tests 4 10 Marking 4 Table 1 Su
20、mmary of requirements for wrought forging stock 5EN2070-7:1989 BSI 01-2000 3 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 wi
21、th EN2070-1. 2 References EN 2002-1, Aerospace series Test methods for metallic materials Part 1: Tensile tests at ambient temperature 1) . EN 2004-2, Aerospace series Test methods foraluminium and aluminium alloys products Part2: Ultrasonic testing of plates, forgings and extrusions. EN 2070-1, Aer
22、ospace series Aluminium 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
23、 and aluminium alloy 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 products 1) . 3 Batch size A batch of forging stock shall consist of material of the same c
24、ross-section from the same cast. A cast is defined in EN2070-1. 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 suffi
25、cient to permit him to certify compliance with the requirements. 5 External defects Visual surface inspection shall be carried out in the delivery condition. The surface of the forging stock shall be clean and free from defects such as cracks, laps, scratches, corrosion, considered harmful to its us
26、e. Surface defects may be removed provided the forging stock dimensions remain within any tolerances that may be specified. 6 Internal defects If required by the order or the inspection schedule products having dimensions in accordance withTable 1 shall be ultrasonically tested in accordance with EN
27、2004-2 and shall, unless otherwise specified, meet the requirements of classA. If the material is ultrasonically tested in a condition different from the condition of supply, this shall be subject to agreement between manufacturer and purchaser and shall be specified on the order, inspection or manu
28、facturing schedule. 7 Tensile test The condition of the material shall comply with the relevant material standard. The tensile test shall be carried out in accordance with EN2002-1 on test samples heat treated in full section or after forging to30mm diameter. Tests shall be performed on proportional
29、 round test pieces of the form and one of the sizes indicated in EN2002-1. The direction of test sample shall be in accordance with the requirements of the material standard. Sampling frequency shall be in accordance withTable 1. The test results shall comply with the relevant material standard. 8 B
30、ack end defect and peripheral coarse grain zone If the product is obtained by extrusion, macrographic examination shall be carried out on a cross section cut from the back end of the extrusion at a frequency sufficient to ensure that the entire batch meets the requirement of this standard. The mater
31、ial shall be tested in accordance with EN2715 and the samples shall be solution heat treated prior to testing. The extrusion shall be free from back end defect and unless otherwise agreed between the manufacturer and the purchaser the maximum thickness of the peripheral coarse grain zone shall be as
32、 specified by the material standard, the order or the inspection schedule. Where necessary, the product may be machined to meet the requirements. 1) In preparationEN2070-7:1989 4 BSI 01-2000 9 Special tests Special tests and inspections may be required by the purchaser. In such cases, after agreemen
33、t between purchaser and manufacturer, the nature of test, method, number and acceptance standards shall be specified on the order or the inspection schedule. 10 Marking Marking shall be in accordance with EN2070-1and EN2070-2 or EN2070-3as appropriate. If special tests in accordance with clause9 are
34、 required the marking shall be defined and shall reflect these extra requirements. The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements.EN 2070-7:1989 BSI 01-2000 5 Table 1 Summary of requirements for wrought forging s
35、tock Dimensions in millimetres Requirements Clause Product Inspection/Testing Method Standard Frequency Dimensions 4 All products See clause 4 External defects 5 All products Visual 100 % Plate: a W 12 Extruded product Product having square or rectangular section: Internal defects 6 Transverse secti
36、on EN 2004-2 100 % W 650 mm 2 Ultrasonic class A if specified Minor dimension a W 12 Round section with diameter W 50 Tensile test 7 All products Tensile EN 2002-1 1 test per batch for each direction specified Back end defect and peripheral coarse grain zone 8 Extruded product Macrography EN 2715 Se
37、e clause 8 Marking 10 All products Visual See clause 106 blankBSEN2070-7:1991 BSI 01-2000 National appendix A The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/61 upon which the f
38、ollowing bodies were represented: Aluminium Federation British Forging Industry Association British Investment Casting Trade Association British Steel Industry Copper Development Association Department of Trade (National Physical Laboratory) Light Metal Founders Association Ministry of Defence Socie
39、ty of British Aerospace Companies Limited National appendix B The British Standards corresponding to the European Standards referred to in the text are identical in number and title as those given in clause2.BS EN 2070-7:1991 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BS
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