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[.]
BRITISH STANDARD 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 669.715.018.26-4:620.1:537.31:629.7 BS EN 2004-1:1993 BS EN 2004-1:1993 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: This British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 September 1993 © BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference ACE/24 Draft for comment 91/74925 DC ISBN 580 21079 Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y France Association franỗaise de normalisation Germany Deutsches Institut fỹr 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 Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Espola de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd No Date Comments BS EN 2004-1:1993 Contents Cooperating organizations National foreword Foreword Text of EN 2004-1 National annex NA (informative) Committees responsible National annex NB (informative) Cross-reference © BSI 08-1999 Page Inside front cover ii Inside back cover Inside back cover i BS EN 2004-1:1993 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 2004-1:1992 Aerospace series — Test methods for aluminium and aluminium alloy products — Part 1: Determination of electrical conductivity of wrought aluminium alloys, published by the European Committee for Standardization (CEN) EN 2004-1 was produced as a result of international discussions in which the UK took 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 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, the EN title page, pages to 4, 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 ii © BSI 08-1999 EUROPEAN STANDARD EN 2004-1 NORME EUROPÉENNE July 1993 EUROPÄISCHE NORM UDC 669.715.018.26-4:620.1:537.31:629.7 Key words: Aircraft industry, aluminium products, aluminium alloys, rolled products, tests, determination, resistivity English version Aerospace series Test methods for aluminium and aluminium alloy products Part 1: Determination of electrical conductivity of wrought aluminium alloys Série aérospatiale Méthodes d’essais applicables aux produits en aluminium et alliages d’aluminium Partie 1: Détermination de la conductivité électrique des alliages d’aluminium corroyés Luft- und Raumfahrt Prüfverfahren für Erzeugnisse aus Aluminium und Aluminiumlegierungen Teil 1: Bestimmung der elektrischen Leitfähigkeit von Aluminium-Knetlegierungen This European Standard was approved by CEN on 1993-07-23 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 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 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 Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © CEN 1993 Copyright reserved to CEN members Ref No EN 2004-1:1993 E EN 2004-1:1993 Foreword 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 National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN 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 January 1994, and conflicting national standards shall be withdrawn at the latest by January 1994 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, Switzerland, United Kingdom Contents Foreword Scope Purpose of the test Normative references Definitions and use of reference blocks Unit of conductivity Principle Limitations Apparatus Calibration and checks on apparatus 10 Procedure 11 Test report Table — Conversion IACS to MS/m Page 3 3 3 4 4 © BSI 08-1999 EN 2004-1:1993 Scope 4.2 secondary reference blocks This standard specifies a non destructive test method for the determination of electrical conductivity of wrought aluminium alloy It is applicable when referenced Purpose of the test The test is used to determine: — the heat treatment condition 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 Normative references This European Standard incorporates by dated or undated reference, 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 in 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 — Part — Calibration of electrical conductivity instrumentation1) Definitions and use of 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 calibration 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 electrical conductivity measurement The operating reference blocks shall be calibrated at the operating frequency against secondary reference blocks Unit of conductivity The unit of electrical conductivity is megasiemens per metre (MS/m) Measuring instruments shall be calibrated in this unit Where the instrument is scaled differently (e.g % IACS), the instrument manufacturer shall supply to the purchaser the values for conversion to MS/m (see Table 1) Principle A comparator method by means of an instrument which requires to be calibrated against operating reference blocks of known electrical conductivity Limitations 7.1 Products of less than 1,2 mm thickness 4.1 master reference blocks 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 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 7.2 Coated products the preparation of other reference blocks They shall not be tested unless the coating is if such blocks are not yet available, other blocks insulating and less than 0,01 mm thick shall be used by agreement between the purchaser and the manufacturer Table — Conversion IACS to MS/m % 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 44,8 46,6 48,3 50,0 51,7 MS/m 23 24 25 26 27 28 29 30 1) In preparation at the date of publication of this standard © BSI 08-1999 EN 2004-1:1993 Apparatus 10.3 Measuring conditions 8.1 The frequency of measuring instruments lies normally between kHz and 800 kHz The choice of frequency lies with the purchaser of the instrument 8.2 Should a multi-range instrument be used, each range shall 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 least 0,2 MS/m 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 10.3.2 During the tests the edges of the test coil or probe shall be at least mm 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 a concave radius of curvature > 500 mm or a convex radius of curvature > 100 mm 10.3.4 The measurement shall be carried out on surfaces with roughness Ra u 10 Èm For products with surface roughness Ra > 10 Èm: — the operating reference blocks shall have the same roughness as the product, or — the surface area to be tested shall be dressed to Ra u 10 Èm Calibration and checks on apparatus 9.1 The apparatus shall be calibrated to EN 2004-7 9.2 Before measuring and at adequate intervals of more than h during testing, the apparatus shall be calibrated against the operating reference blocks and any necessary correction factor or correction applied 9.3 Where routine measurement is made over a limited range of conductivity (3,5 MS/m max.), 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 = 0,3 MS/m from the 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 reference 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 of 60 kHz is the most widely used For sheet thickness 1,2 mm u a u 1,6 mm the minimum frequency to be used shall be 60 kHz 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 slightly 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 measurements in MS/m; — measuring positions; — type and reference number of the instrument used © BSI 08-1999 BS EN 2004-1:1993 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee (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 British 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 Standard corresponding to EN 2004-7 referred to in the text It is envisaged that a British Standard identical in number and title will be published in due course © BSI 08-1999 BS EN 2004-1:1993 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