1、BRITISH STANDARD AEROSPACE SERIES BSEN 2076-3:1991 Specification for Aluminium and magnesium alloy ingots and castings Technical specification Part 3: Pre-production and production castings This European Standard EN 2076-3:1989 has the status of a British Standard.BSEN2076-3:1991 This British Standa
2、rd was published under the authorityofthe BoardofBSIand comesintoeffecton 31January1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/61 Draft for comment 88/72194 DC ISBN 0 580 19177 X Cooperating organizations The European Committee for Stand
3、ardization, 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 St
4、andardisoimisliito, 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 L
5、uxemburg 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 suisse
6、 de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date of issue CommentsBSEN2076-3:1991 BSI 11-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN 2076-3 3 National appendix A Insi
7、de back cover National appendix B Inside back coverBSEN2076-3:1991 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN2076“Aerospace series. Aluminium and magnesium alloy in
8、gots and castings. Technical specification.” Part 3, “Pre-production and production castings”, published by the European Committee for Standardization (CEN). EN2076-3 was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport to incl
9、ude all the 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
10、 i and ii, theEN title page, pages 2 to 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 E
11、N 2076-3 November 1989 UDC: 669.715-4:669.721.5-4:620.1:629.7 Key words: Aircraft industry, castings, ingots, aluminium alloys, magnesium alloys, specifications, manufacturing, tests English version Aerospace series Aluminium and magnesium alloy ingots and castings Technical specification Part 3: Pr
12、e-production and production castings Srie arospatiale Lingots et pices moules en alliages daluminium et de magnsium Spcification technique Partie 3: Pices types et pices de srie Luft- und Raumfahrt Blcke und Gustcke aus Aluminium- und Magnesiumlegierungen Technische Lieferbedingungen Teil 3: Ausfall
13、muster und Seriengustcke This European Standard was accepted by CEN 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 l
14、ists 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 under the
15、 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, Netherl
16、ands, 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 2076-3:1
17、989 EEN2076-3:1989 BSI 11-1999 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 of the
18、 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, Iceland,
19、 Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Brief history 2 1 Scope and field of application 3 2 References 3 3 Casting development 3 4 Pre-production castings 3 5 Manufacture of production castings 3 6 Inspection and testin
20、g of production castings 4 7 Weld repair 6 8 Marking 6 Table 1 Summary of requirements for production castings 7 Table 2 Radiographic acceptance standards for aluminium alloy castings up to a thickness of 19 mm 8 Table 3 Radiographic acceptance standards for magnesium alloy castings up to a thicknes
21、s of 19 mm 9EN2076-3:1989 BSI 11-1999 3 1 Scope and field of application This standard specifies the particular requirements for castings in aluminium and magnesium alloys produced from material complying with EN 2076-2. This standard also applies to pre-production castings intended for the qualific
22、ation of the method of manufacture and inspection. This standard shall be used in conjunction with EN2076-1. 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
23、 Part 7 Hardness tests 1) . EN 2002-16, Aerospace series Test methods for metallic materials Part 16 Dye penetrant testing 1) . EN 2002-21, Aerospace series Test methods for metallic materials Part 21 Radiographic testing of cast components 1) . EN 2004-4, Aerospace series Test methods for aluminium
24、 and aluminium alloys Part 4 Stress corrosion test method for high strength aluminium alloy wrought products. Alternate immersion 1) . EN 2076-1, Aerospace series Aluminium and magnesium alloy ingots and castings Technical specification Part 1 General requirements. EN 2076-2, Aerospace series Alumin
25、ium and magnesium alloy ingots and castings Technical specification Part 2 Ingots for remelting. 3 Casting development It is strongly recommended that the technical representative of the manufacturer be given the opportunity to examine the casting drawing at the initial stages of design and to advis
26、e on the optimum design which will facilitate consistent production of acceptable castings. The dimensional tolerances of the castings shall be as agreed between the purchaser and manufacturer and indicated on the drawing or the inspection schedule. 4 Pre-production castings 4.1 General 4.1.1 The fo
27、llowing requirements shall be specified on the order, drawing and/or inspection schedule in addition to those specified in EN 2076-1: Number of castings to be examined Who shall perform the examination Heat treatment condition Type and frequency of inspection and testing necessary to evaluate and qu
28、alify the manufacturing process (dimensions, mechanical and metallurgical properties, etc.). 4.1.2 The inspection and testing of pre-production castings shall be carried out and the inspection and testing conditions shall be recorded to allow the definition of the optimum techniques to be used for p
29、roduction castings. 4.1.3 The inspection and tests carried out on pre-production castings shall include those which will be carried out on production castings. 4.2 Inspection and testing report In addition to the information required by EN 2076-1, the inspection and testing report on the pre-product
30、ion castings shall provide all technical information to allow evaluation of the quality of these parts, e.g., radiographs, results of dimensional measurements. 4.3 Acceptance of pre-production castings When all inspection and test results relative to pre-production castings have been reported and co
31、nsidered as satisfactory by the purchaser and manufacturer, 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 purchaser. 5 Manufacture of production castings 5
32、.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 minor, shall be recorded in the manufacturing sche
33、dule. 1) In preparationEN2076-3:1989 4 BSI 11-1999 5.2 When a manufacturing schedule has been agreed, no change in manufacturing method shall be made without the written approval of the purchaser. When such changes are necessary in the case of, for example: a) Alterations of pattern, mould material
34、or position of runners and risers, b) Alteration of the casting process, c) Alterations of the heat treatment process, the purchaser shall decide if new pre-production castings shall be manufactured and tested. The manufacturing schedule and the inspection schedule shall be modified if necessary. 5.
35、3 Any change of the casting requiring a revised drawing may require at the purchasers or manufacturers request: manufacturing of new pre-production castings, or modification of the manufacturing schedule and/or the inspection schedule. 5.4 Manufacturing schedules and inspection schedules, which are
36、modified during production shall be subjected to the same approval process as the original documents. 5.5 Approved scrap may be added to the melt at the discretion of the manufacturer up to the maximum amount specified on the manufacturing schedule. 5.6 Correction of distortion shall be carried out
37、only by agreement between the manufacturer and the purchaser. The manufacturer shall be responsible for specifying the conditions under which such correction is to be carried out, subject to any provisions made by the purchaser. The method agreed shall be incorporated in the manufacturing schedule.
38、After correction of distortion the castings shall be examined by penetrant flaw detection as per clause6.3. 6 Inspection and testing of production castings Inspection and testing shall be carried out on production castings under the same conditions as applied to pre-production castings. 6.1 Dimensio
39、ns and tolerances The dimensions specially indicated by the purchaser shall be checked on every casting. For other dimensions the frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements. 6.2 Chemical analysis In addition to E
40、N2076-1, the manufacturer shall perform sufficient analysis throughout the casting cycle to ensure that the composition of all the castings will conform to the requirements of the material standard. 6.3 External defects 6.3.1 Castings shall be suitably fettled and cleaned to enable inspection to be
41、carried out in a satisfactory manner. 6.3.2 Each casting shall be examined for surface defects by visual inspection and by penetrant flaw detection after all specified heat treatment and pressure testing is completed. Penetrant testing shall be carried out in accordance with the requirements of EN 2
42、002-16. Castings shall be free from cracks and cracklike indications. For other indications the acceptance level is detailed on the inspection schedule, if necessary. 6.3.3 Surface defects may be removed by local dressing provided the castings are subsequently within the dimensional tolerances. Dres
43、sing shall be followed by penetrant flaw detection in accordance with clause 6.3.2. 6.4 Internal defects Castings shall be radiographically examined in accordance with EN2002-21. The technique and frequency to be used shall be agreed and specified on the drawing or inspection schedule. The radiograp
44、hic standard of acceptance shall conform to grade B of Table 2 (Al-alloys) and Table 3 (Mg-alloys), unless otherwise specified on the drawing or inspection schedule, by reference to a quality level of Table 1, or to alternative general or localised levels agreed and defined on the drawing or in the
45、inspection schedule. Unless otherwise agreed, all radiographs shall be forwarded to the purchaser, suitably identified to the castings they represent. 6.5 Tensile testing 6.5.1 Number, selection and preparation of test samples for tests and re-tests 6.5.1.1 Test samples for tests required by the dra
46、wing or inspection schedule, shall be obtained by one or more of the following methods as agreed between the manufacturer and the purchaser and indicated on the drawing or inspection schedule referring to a quality level of Table 1: 1) Test samples cut from castings,EN2076-3:1989 BSI 11-1999 5 2) Te
47、st samples cast in similar mould materials under similar conditions to the castings they represent but cast from the same melt into a separate mould. 3) Test samples cast integrally with/or gated to castings, 6.5.1.2 In the absence of any indication on the drawing or inspection schedule test samples
48、 shall be obtained by casting separate test samples. 6.5.1.3 When the test samples are to be cut from a casting the purchaser shall define on the casting drawing or inspection schedule the location from which the test samples are to be taken. 6.5.1.4 When the test samples are to be cast integrally w
49、ith/or gated to castings the purchaser shall define on the casting drawing or inspection schedule their location and the properties to be achieved if not specified in, or are required to be different from the material standard. 6.5.2 Dimensions of test pieces 6.5.2.1 Dimensions of test pieces shall be agreed between manufacturer and purchaser and shall be stated on the order or inspection schedule. Where product thickness permits tests shall be performed on proportional round test pi
