1、BRITISH STANDARD BS EN 2004-1:1993 Test methods for aluminium and aluminium alloy products Part 1: Determination of electrical conductivity of wrought aluminium alloys The European Standard EN 2004-1:1993 has the status of a British Standard UDC 669.715.018.26-4:620.1:537.31:629.7BSEN2004-1:1993 Thi
2、s British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15 September 1993 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference
3、ACE/24 Draft for comment 91/74925 DC ISBN 0 580 21079 0 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normun
4、gsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of
5、Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de
6、Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN2004-1:1993 BSI 08-1999 i Contents Page Cooperating organizations Insid
7、e front cover National foreword ii Foreword 2 Text of EN 2004-1 3 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-reference Inside back coverBSEN2004-1:1993 ii BSI 08-1999 National foreword This British Standard has been prepared under t
8、he direction of the Aerospace Standards Policy Committee and is the English language version of EN2004-1:1992 Aerospace series Test methods for aluminium and aluminium alloy products Part1: Determination of electrical conductivity of wrought aluminium alloys, published by the European Committee for
9、Standardization(CEN). EN2004-1was produced as a result of international discussions in which the UKtook an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with
10、 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, theEN title page, pages 2 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and
11、 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 2004-1 July 1993 UDC 669.715.018.26-4:620.1:537.31:629.7 Key words: Aircraft industry, aluminium products, aluminium alloys, rolled prod
12、ucts, tests, determination, resistivity Englishversion Aerospace series Test methods for aluminium and aluminium alloy products Part1: Determination of electrical conductivity of wrought aluminium alloys Srie arospatiale Mthodes dessais applicables aux produits en aluminium et alliages daluminium Pa
13、rtie1: Dtermination de la conductivit lectrique des alliages daluminium corroys Luft- und Raumfahrt Prfverfahren fr Erzeugnisse aus Aluminium und Aluminiumlegierungen Teil1: Bestimmung der elektrischen Leitfhigkeit von Aluminium-Knetlegierungen This European Standard was approved by CEN on1993-07-23
14、. CEN members are bound to comply with the CEN/CENELEC 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 standards may be obtained on
15、 application to the 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 to the Central Secretariat
16、 has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for S
17、tandardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1993 Copyright reserved to CEN members Ref. No. EN 2004-1:1993 EEN2004-1:1993 BSI 08-1999 2 Foreword This European Standard has been prepared by the European Asso
18、ciation 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 countries of AECMA, prior to its presentation
19、toCEN. This standard was submitted for Formal Vote, and the result was positive. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January1994, and conflicting national standards shall be withdrawn
20、at the latest by January1994. According to the CEN/CENELEC Internal Regulations, 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, Sweden, Swit
21、zerland, United Kingdom Contents Page Foreword 2 1 Scope 3 2 Purpose of the test 3 3 Normative references 3 4 Definitions and use of reference blocks 3 5 Unit of conductivity 3 6 Principle 3 7 Limitations 3 8 Apparatus 4 9 Calibration and checks on apparatus 4 10 Procedure 4 11 Test report 4 Table 1
22、 Conversion IACS to MS/m 3EN2004-1:1993 BSI 08-1999 3 1 Scope This standard specifies a non destructive test method for the determination of electrical conductivity of wrought aluminium alloy. It is applicable when referenced. 2 Purpose of the test The test is used to determine: the heat treatment c
23、ondition of products; the heat treatment uniformity of batches; the heat treatment condition in which some alloys show the lowest susceptibility to stress corrosion attack; the uniformity of cladding thickness. 3 Normative references This European Standard incorporates by dated or undated reference,
24、 provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated i
25、n it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 2004-7, Aerospace series Test methods for aluminium and aluminium alloy products Part7 Calibration of electrical conductivity instrumentation 1) . 4 Definitions and use of reference bl
26、ocks 4.1 master reference blocks blocks of sensibly uniform electrical conductivity the values of which have been determined and calibrated in a standardised bridge. They shall be used solely to calibrate and to act as standards for the preparation of other reference blocks if such blocks are not ye
27、t available, other blocks shall be used by agreement between the purchaser and the manufacturer 4.2 secondary reference blocks blocks of sensibly uniform electrical conductivity calibrated either against a standardised bridge or against master reference blocks such that they may be used for the cali
28、bration of operating reference blocks. They shall be used by material manufacturers and users for the calibration of apparatus for electrical conductivity measurement to the requirements of this standard 4.3 operating reference blocks blocks necessary for operation and calibration of apparatus for e
29、lectrical conductivity measurement. The operating reference blocks shall be calibrated at the operating frequency against secondary reference blocks 5 Unit of conductivity The unit of electrical conductivity is megasiemens per metre (MS/m). Measuring instruments shall be calibrated in this unit. Whe
30、re the instrument is scaled differently (e.g.% IACS), the instrument manufacturer shall supply to the purchaser the values for conversion to MS/m (seeTable 1). 6 Principle A comparator method by means of an instrument which requires to be calibrated against operating reference blocks of known electr
31、ical conductivity. 7 Limitations 7.1 Products of less than 1,2 mm thickness They shall only be tested by agreement between the purchaser and the manufacturer. These parties shall jointly define the corrections and acceptance conditions to be applied during testing and acceptance of these products. 7
32、.2 Coated products They shall not be tested unless the coating is insulating and less than0,01mm thick. Table 1 Conversion IACS to MS/m 1) In preparation at the date of publication of this standard. % IACS 25,9 27,6 29,3 31,0 32,8 34,5 36,2 37,9 MS/m 15 16 17 18 19 20 21 22 % IACS 39,7 41,4 43,1 44,
33、8 46,6 48,3 50,0 51,7 MS/m 23 24 25 26 27 28 29 30EN2004-1:1993 4 BSI 08-1999 8 Apparatus 8.1 The frequency of measuring instruments lies normally between2kHz and 800kHz. The choice of frequency lies with the purchaser of the instrument. 8.2 Should a multi-range instrument be used, each range shall
34、be calibrated. 8.3 Every time when an instrument is to be used for determining uniformity of cladding thickness, it shall be calibrated at the operating frequency. 8.4 The reading or measuring instrument shall be so accurate that the indication can be read to an accuracy of at least0,2MS/m. 9 Calibr
35、ation and checks on apparatus 9.1 The apparatus shall be calibrated to EN2004-7. 9.2 Before measuring and at adequate intervals of more than2h during testing, the apparatus shall be calibrated against the operating reference blocks and any necessary correction factor or correction applied. 9.3 Where
36、 routine measurement is made over a limited range of conductivity (3,5MS/mmax.), the apparatus shall be regularly checked at the high and low limits of this range using the operating reference blocks with the same limits. 9.4 If the measuring instrument shows a greater deviation than=0,3MS/m from th
37、e operating reference blocks, it shall be re-calibrated and all parts re-checked. 10 Procedure 10.1 Temperature The apparatus and operating reference blocks shall be used in conditions of stable temperature and the product to be tested shall be as near as possible to this stable temperature. All ref
38、erence blocks used for measurements shall be placed in contact with the product under examination for a period of time sufficient to achieve a uniform temperature and where possible remain in contact during the whole test. 10.2 Frequency A frequency of60kHz is the most widely used. For sheet thickne
39、ss1,2mm u a u 1,6mm the minimum frequency to be used shall be60kHz. 10.3 Measuring conditions 10.3.1 Unless otherwise stated in the technical specification or design documents, the measurement shall be made with the probe on a surface which is parallel to the longitudinal direction of the product. 1
40、0.3.2 During the tests the edges of the test coil or probe shall be at least8mm from an edge or a surface discontinuity. Tests shall not be made where an element can influence the reading. 10.3.3 Unless otherwise agreed between purchaser and manufacturer, measurements shall be made on surface having
41、 a concave radius of curvature500mm or a convex radius of curvature100mm. 10.3.4 The measurement shall be carried out on surfaces with roughness Rau 10m. For products with surface roughness Ra 10 m: the operating reference blocks shall have the same roughness as the product, or the surface area to b
42、e tested shall be dressed to Ra u 10 m. 10.3.5 Surface cleanliness All surfaces to be tested shall be clean and free from loose contaminant. 10.3.6 Irregular readings Where local irregular variations in reading are obtained, the presence of small surface flaws may be suspected. The surface may be sl
43、ightly dressed to remove such flaws. If the irregular readings are still displayed at this point, they shall be stated in the test report with the remark after dressing. 11 Test report The test report shall include the following: reference to this standard; results of electrical conductivity measure
44、ments in MS/m; measuring positions; type and reference number of the instrument used.BSEN2004-1:1993 BSI 08-1999 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Commit
45、tee (ACE/-) to Technical Committee ACE/24 upon which the following bodies were represented: Aluminium Federation Aluminium Stockholders Association Association of Light Alloy Refiners Limited BNF Metals Technology Centre British Forging Industry Association British Industrial Fasteners Federation Br
46、itish Investment Casting Trade Association Institute of British Foundrymen Light Metal Founders Association Magnesium Industry Council Ministry of Defence National Centre of Tribology Society of British Aerospace Companies Limited National annex NB (informative) Cross-reference There is no British S
47、tandard corresponding to EN2004-7referred to in the text. It is envisaged that a British Standard identical in number and title will be published in due course.BS EN 2004-1:1993 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible f
48、or preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or ed
49、itions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standa
