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1、BRITISH STANDARD AEROSPACE SERIES BS EN 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. Licensed Copy: sheffieldun sheffi
2、eldun, na, Fri Nov 03 01:13:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2076-3:1991 This British Standard was published under the authority of the Board of BSI and comes into effect on 31 January 1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee ref
3、erence ACE/61 Draft for comment 88/72194 DC ISBN 0 580 19177 X Cooperating organizations The European Committee for Standardization, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. AustriaOesterr
4、eichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Ins
5、titute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxemburgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola d
6、e Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:13:27 GMT+
7、00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2076-3:1991 BSI 11-1999i Contents Page Cooperating organizationsInside front cover National forewordii Brief history2 Text of EN 2076-33 National appendix AInside back cover National appendix BInside back cover Licensed Copy: sheffieldun sheffieldun, na,
8、Fri Nov 03 01:13:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2076-3:1991 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 EN 2076 “Aerospace series. Aluminium and ma
9、gnesium alloy ingots and castings. Technical specification.” Part 3, “Pre-production and production castings”, published by the European Committee for Standardization (CEN). EN 2076-3 was produced as a result of international discussion in which the UK took an active part. A British Standard does no
10、t purport to include 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 f
11、ront cover, pages i and ii, the EN 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. Licensed Copy: sheffieldun sheff
12、ieldun, na, Fri Nov 03 01:13:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 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, manufacturin
13、g, tests English version Aerospace series Aluminium and magnesium alloy ingots and castings Technical specification Part 3: Pre-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 s
14、rie Luft- und Raumfahrt Blcke und Gustcke aus Aluminium- und Magnesiumlegierungen Technische Lieferbedingungen Teil 3: Ausfallmuster 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 sti
15、pulate 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 standards may be obtained on application to the CEN Central Secretariat or to any CEN member. This European Stand
16、ard 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 to CEN Central Secretariat has the same status as the official versions. CEN members are the national stand
17、ards organizations of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normun
18、g Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1989 Copyright reserved to all CEN members Ref. No. EN 2076-3:1989 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:13:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2076-3:1989 BSI 11-1999 2 Brief history This European Stan
19、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 co
20、untries 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, Luxembourg, Netherlands, Norway, Portugal, Spain
21、, Sweden, Switzerland and United Kingdom. Contents Page Brief history2 1Scope and field of application3 2References3 3Casting development3 4Pre-production castings3 5Manufacture of production castings3 6Inspection and testing of production castings4 7Weld repair6 8Marking6 Table 1 Summary of require
22、ments for production castings7 Table 2 Radiographic acceptance standards for aluminium alloy castings up to a thickness of 19 mm8 Table 3 Radiographic acceptance standards for magnesium alloy castings up to a thickness of 19 mm9 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:13:27 GMT+00:
23、00 2006, Uncontrolled Copy, (c) BSI EN 2076-3:1989 BSI 11-19993 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 i
24、ntended for the qualification of the method of manufacture and inspection. This standard shall be used in conjunction with EN 2076-1. 2 References EN 2002-1, Aerospace series Test methods for metallic materials Part 1 Tensile testing at ambient temperature1). EN 2002-7, Aerospace series Test methods
25、 for metallic materials Part 7 Hardness tests1). EN 2002-16, Aerospace series Test methods for metallic materials Part 16 Dye penetrant testing1). EN 2002-21, Aerospace series Test methods for metallic materials Part 21 Radiographic testing of cast components1). EN 2004-4, Aerospace series Test meth
26、ods for aluminium and aluminium alloys Part 4 Stress corrosion test method for high strength aluminium alloy wrought products. Alternate immersion1). EN 2076-1, Aerospace series Aluminium and magnesium alloy ingots and castings Technical specification Part 1 General requirements. EN 2076-2, Aerospac
27、e series Aluminium 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 desi
28、gn and to advise 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 Gener
29、al 4.1.1 The following 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
30、evaluate and qualify 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 t
31、o be used for production 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
32、the pre-production 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
33、been reported and considered 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 p
34、roduction castings 5.1 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 th
35、e manufacturing schedule. 1) In preparation Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:13:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2076-3:1989 4 BSI 11-1999 5.2 When a manufacturing schedule has been agreed, no change in manufacturing method shall be made without the written a
36、pproval of the purchaser. When such changes are necessary in the case of, for example: a) Alterations of pattern, mould material 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 cas
37、tings shall be manufactured and tested. The manufacturing schedule and the inspection schedule shall be modified if necessary. 5.3 Any change of the casting requiring a revised drawing may require at the purchasers or manufacturers request: manufacturing of new pre-production castings, or modificati
38、on of the manufacturing schedule and/or the inspection schedule. 5.4 Manufacturing schedules and inspection schedules, which are 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
39、manufacturer up to the maximum amount specified on the manufacturing schedule. 5.6 Correction of distortion shall be carried out 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 carr
40、ied out, subject to any provisions made by the purchaser. The method agreed shall be incorporated in the manufacturing schedule. After correction of distortion the castings shall be examined by penetrant flaw detection as per clause 6.3. 6 Inspection and testing of production castings Inspection and
41、 testing shall be carried out on production castings under the same conditions as applied to pre-production castings. 6.1 Dimensions 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
42、manufacturer shall be sufficient to permit him to certify compliance with the requirements. 6.2 Chemical analysis In addition to EN 2076-1, the manufacturer shall perform sufficient analysis throughout the casting cycle to ensure that the composition of all the castings will conform to the requireme
43、nts of the material standard. 6.3 External defects 6.3.1 Castings shall be suitably fettled and cleaned to enable inspection to be 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 h
44、eat treatment and pressure testing is completed. Penetrant testing shall be carried out in accordance with the requirements of EN 2002-16. Castings shall be free from cracks and cracklike indications. For other indications the acceptance level is detailed on the inspection schedule, if necessary. 6.
45、3.3 Surface defects may be removed by local dressing provided the castings are subsequently within the dimensional tolerances. Dressing 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 E
46、N 2002-21. The technique and frequency to be used shall be agreed and specified on the drawing or inspection schedule. The radiographic 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
47、 reference to a quality level of Table 1, or to alternative general or localised levels agreed and defined on the drawing or in the inspection schedule. Unless otherwise agreed, all radiographs shall be forwarded to the purchaser, suitably identified to the castings they represent. 6.5 Tensile testi
48、ng 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 drawing 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
49、 or inspection schedule referring to a quality level of Table 1: 1) Test samples cut from castings, Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:13:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2076-3:1989 BSI 11-19995 2) Test 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 indicat