1、BRITISH STANDARD AEROSPACE SERIES BS EN 2082-3:1991 Specification for Aluminium alloy forging stock and forgings Technical specification Part 3: Pre-production and production forgings This European Standard EN 2082-3:1989 has the status of a British Standard.BSEN 2082-3:1991 This British Standard wa
2、s published under the authority ofthe Board of BSI and comes intoeffect on 31January1991 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ACE/61 Draft for comment 88/75600 DC ISBN 0 580 19159 1 Cooperating organizations The European Committee for Stan
3、dardization, 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 S
4、tandardisoimisliito, 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
5、Luxemburg Inspection 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 suiss
6、e de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date of issue CommentsBSEN 2082-3:1991 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii Brief history 2 Text of EN 2082-3 3 National appendix A Insid
7、e back cover National appendix B Inside back coverBSEN 2082-3:1991 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN2082“Aerospace series. Aluminium alloy forging stock an
8、d forgings. Technical specification” Part 3 “Pre-production and production forgings”, published by the European Committee for Standardization (CEN). EN2082-3was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all th
9、e necessary provisions of 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, pages i and ii,
10、 theEN title page, pages 2 to 6, 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 2082-3 No
11、vember 1989 UDC 669.715-4:621.73.04:629.7 Key words: Aircraft industry, forgings, die forgings, aluminium alloys, detail specifications, production control, marking English version Aerospace series Aluminium alloy forging stock and forgings Technical specification Part 3: Pre-production and producti
12、on forgings Srie arospatiale Produits destins la forge, pices forges et pices matrices en alliages daluminium Spcification technique Partie 3: Pices types et pices de srie Luft- und Raumfahrt Schmiedevormaterial und Schmiedestcke aus Aluminiumlegierungen Technische Lieferbedingungen Teil 3: Ausfallm
13、uster- und Serienschmiedestcke This European Standard was accepted by CEN on 1988-11-03. 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-
14、date lists and bibliographical references concerning such national standards 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 und
15、er the responsibility of a CEN member into its own language and notified 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, N
16、etherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. 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 20
17、82-3:1989 EEN 2082-3:1989 BSI 12-1999 2 Brief history This European Standard 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
18、of the National Associations and the Official Services of the member countries 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, Ic
19、eland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Brief history 2 1 Scope and field of application 3 2 References 3 3 Pre-production forgings 3 4 Manufacture of production forgings 3 5 Inspection and testing of production fo
20、rgings 4 6 Marking 5 Table 4 Summary of requirements for production forgings 6EN 2082-3:1989 BSI 12-1999 3 1 Scope and field of application This standard specifies the particular requirements for aluminium alloy pre-production and production forgings produced from forging stock complying with EN 208
21、2-2. It shall be used in conjunction with EN 2082-1. 2 References EN 2002-1, Aerospace series Test methods for metallic materials Part 1: Tensile testing at ambient temperature 1) . EN 2002-7, Aerospace series Test methods for metallic materials Part 7: Hardness tests 1) . EN 2002-16, Aerospace seri
22、es Test methods for metallic materials Part 16: Dye penetrant testing 1) . EN 2002-22, Aerospace series Test methods for metallic materials Part 22: Plane strain fracture toughness test 1) . EN 2002-23, Aerospace series Test methods for metallic materials Part 23: Sharp-notch tension testing 1) . EN
23、 2004-1, Aerospace series Test methods for aluminium and aluminium alloy products Part1: Determination of electrical conductivity of wrought aluminium alloys 1) . EN 2004-2, Test methods for aluminium and aluminium alloy products Part 2: Ultrasonic testing of plates, forgings and extrusions Aerospac
24、e series. EN 2004-4, Aerospace series Test methods for aluminium and aluminium alloy products Part 4: Stress corrosion cracking test. EN 2082-1, Aerospace series Aluminium alloy forging stock and forgings Technical specification Part 1: General requirements. EN 2082-2, Aerospace series Aluminium all
25、oy forging stock and forgings Technical specification Part 2: Forging stock. EN 2101, Aerospace series Chromic acid anodizing of aluminium and wrought aluminium alloys. 3 Pre-production forgings 3.1 General 3.1.1 The following requirements shall be specified in the order, drawing and/or inspection s
26、chedule in addition to those specified by EN 2082-1. Number of forgings, Who shall perform the examination, Heat treatment condition of these forgings, Type and number of tests and inspections necessary to evaluate and qualify the manufacturing process (dimensions, mechanical and metallurgical prope
27、rties, etc .). 3.1.2 The inspection and testing on pre-production forgings shall be carried out and the inspection and test conditions shall be recorded to allow the definition of the optimum techniques to be used for production forgings, including, where appropriate, the ultrasonic test method (pro
28、be, frequency, angle of incidence .). 3.1.3 The inspection and tests carried out on pre-production forgings shall include those which will be carried out on production forgings. 3.2 Inspection report In addition to the information required by EN 2082-1, the inspection and test report on the pre-prod
29、uction forgings shall provide all technical information to evaluate the quality of these parts, e.g. photographs taken during macro- and microscopic examination, results of dimensional measurements . 3.3 Acceptance of pre-production forgings When all inspection and test results relative to pre-produ
30、ction forgings have been reported and considered as satisfactory by the manufacturer and the purchaser, the purchaser shall give his written agreement or order for series production. The inspection schedule and if required the manufacturing schedule shall be agreed between the manufacturer and the p
31、urchaser. 4 Manufacture of production forgings 4.1 At the start of production (particularly at the start of series production), the manufacturing schedule may be completed to allow the manufacturer to guarantee the reproducibility of the product with more certainty. All information, no matter how mi
32、nor, shall be recorded in the manufacturing schedule. 4.2 When a manufacturing schedule has been agreed, no change in manufacturing method shall be made without the written approval of the purchaser. When changes are necessary, the purchaser shall decide if new pre-production forgings shall be manuf
33、actured and tested. The manufacturing schedule and the inspection schedule shall be modified if necessary. 1) In preparationEN 2082-3:1989 4 BSI 12-1999 4.3 Any change of the forging requiring a revised drawing may require at the purchasers or manufacturers request: Manufacturing of new pre-producti
34、on forgings, or Modification of the manufacturing schedule and/or the inspection schedule. 4.4 Manufacturing schedules and inspection schedules, which are modified during production shall be subjected to the same approval process as the original documents. 4.5 Straightening operations in the fully h
35、eat treated condition shall be the subject of an agreement between the manufacturer and the purchaser and stated in the manufacturing schedule. 5 Inspection and testing of production forgings Inspection and testing shall be carried out on production forgings under the same conditions as applied to p
36、re-production forgings. 5.1 Non destructive tests 5.1.1 External defects A visual examination shall be carried out on all surfaces of each forging after: Etching, or Etching and chromic acid anodizing followed by coldwater rinse conforming with EN 2101, or Etching and penetrant flaw detection in con
37、formity with EN 2002-16. The test method shall be indicated in the order or the inspection schedule. The surface of forgings shall be free from harmful defects, such as cracks, laps, etc. Local dressing may be carried out by the manufacturer provided the dimensions of the product remain within the t
38、olerance limits. 5.1.2 Internal defects When required by the drawing or the inspection schedule, the forgings shall be submitted to an ultrasonic inspection in accordance with EN2004-2and the method defined during evaluation of the pre-production forgings. The areas to be inspected shall be defined
39、by the drawing or the inspection schedule. Unless otherwise stated by the purchaser, the acceptance conditions shall be those of class A as defined by EN 2004-2. Where the shape does not permit inspection at the final stage of fabrication, it may be carried out at an earlier stage by agreement betwe
40、en manufacturer and purchaser. The test frequency is given in the table. 5.1.3 Batch uniformity Unless otherwise specified by the purchaser the batch uniformity of forgings supplied in the T. 2)condition shall be ensured by one of the three following methods a, b 1or b 2to demonstrate that the mater
41、ial has been properly heat treated and that the batch is uniform. The measurements shall be carried out at the locations indicated by the drawing or inspection schedule. Method “a” for 7. 2)series alloys in T 7. 2)tempers Method “b” for other alloys or tempers The choice between b 1and b 2shall be a
42、t the discretion of the manufacturer. b 1 : Electrical conductivity measurement on each forging, and10% of them including the forgings having the lowest and highest conductivity, shall be hardness tested or, b 2 : Hardness testing on each forging, and10% of them including the forgings having the low
43、est and highest hardness, shall be conductivity tested. 5.1.3.1 Electrical conductivity measurement The conductivity measurement shall be carried out in accordance with EN 2004-1. The values obtained shall conform to the requirements of the material standards and the maximum variations shall be as f
44、ollows: 1,5 MS/m per forging, 2 MS/m per batch. If no values are stated in the material standard, the electrical conductivity shall demonstrate that the material has been properly heat treated and the above mentioned maximum variations shall apply. 5.1.3.2 Hardness testing Hardness shall be determin
45、ed in conformance with EN2002-7and the recorded values shall meet the requirements of the material standards. 5.1.4 Dimensions and tolerances The dimensions and tolerances shall conform with the drawing or the inspection schedule. 2) “Aluminium Association” designations Electrical conductivity measu
46、rement and hardness testing on each forging.EN 2082-3:1989 BSI 12-1999 5 The dimensions specially indicated by the purchaser shall be checked on every forging. For other dimensions the frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with t
47、he requirements. 5.2 Tensile test The nature (cut-up, forged separately or integrally forged test samples), the quantity and the locations of the test pieces shall conform with the drawing and/or the inspection schedule. The test shall be conducted in conformance with EN2002-1. Tests on material thi
48、cker than10mm shall be performed on proportional round test pieces according to EN 2002-1. The results shall conform to the values specified by the material standard. The test frequency is given in the table. 5.3 Grain flow and grain size If grain flow and grain size examination is required by the d
49、rawing or inspection schedule, macrographic and micrographic examination shall be carried out in accordance with the type and frequency requirements of the drawing or inspection schedule. The test results shall conform to the results obtained on pre-production forgings. 5.4 Stress corrosion Where required by the material standard stress corrosion testing shall be carried out in accordance with the requirement of EN 2004-4. The “capability clause” applies to this test. The f
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