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1、BRITISH STANDARDAluminium and aluminium alloys FinstockPart 3. Tolerances on dimensions and formThe European Standard EN 683-3 : 1996 has the status of aBritish StandardICS 77.120.10| BS EN683-3 : 1997|NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 683-3 : 1997Committees
2、 responsible for thisBritish StandardThe preparation of this British Standard was entrusted by the Sector Board for Engineering (E/-) to Technical Committee NFE/35, Light metals and their alloys, upon which the following bodies were represented:Aluminium FederationAluminium Stockholders Association
3、Association of Light Alloy Refiners Ltd. Magnesium Industry CouncilMinistry of DefenceThe following bodies were also represented in the drafting of the standard, through subcommittees and panels:Association of British Welded Aluminium Tube MakersInstitution of Structural EngineersMetal Packaging Man
4、ufacturers AssociationThis British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on15 April 1997BSI 1997The following BSI references relate to the work on this standard:Committee refe
5、rence NFE/35Draft for comment 92/43622 DCISBN 0 580 26788 1Amd. No.DateText affectedAmendments issued since publicationBS EN 683-3 : 1997ContentsPage Committees responsible Inside front cover National foreword ii Foreword 2Text of EN 683-33BSI 1997iBS EN 683-3 : 1997National forewordThis British Sta
6、ndard has been prepared under the direction of the Engineering Sector Board and is the English language version of EN 683-3 : 1996 Aluminium and aluminium alloys Finstock Part 3: Tolerances on dimensions and form, published by the European Committee for Standardization (CEN).Cross-referencesPublicat
7、ion referred to Corresponding British StandardEN 683-1 : 1996BS EN 683-1Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, the ENtitle page, pages 2 to 4, an inside
8、 back cover and a back cover.iiBSI 1997EUROPEAN STANDARDEN 683-3NORME EUROPE ENNEEUROPA ISCHE NORMJuly 1996ICS 77.120.10; 77.140.50Descriptors: Aluminium, aluminium alloys, rolled products, thin films, heat transfer, dimensional tolerancesEnglish versionAluminium and aluminium alloys Finstock Part 3
9、: Tolerances on dimensions and formAluminium et alliages daluminium Bandes pour e changeurs thermiques Partie 3: Tole rances sur dimensions et formeAluminium und Aluminiumlegierungen Vormaterial fu r Wa rmeaustauscher (Finstock) Teil 3: Grenzabmae und FormtoleranzenThis European Standard was approve
10、d by CEN on 1996-07-28. 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 standar
11、ds may be obtained on application to the Central Secretariat or to any CEN member.The European Standards exist 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
12、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.CENEuropean
13、 Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r NormungCentral Secretariat: rue de Stassart 36, B-1050 Brussels1996 Copyright reserved to CEN and its members.Ref. No. EN 683-3 : 1996 EPage EN 683-3 : 1996BSI 1997ForewordThis European Standard has been prep
14、ared byTechnical Committee CEN/TC 132, Aluminium andContentsPagealuminium alloys, of which the Secretariat is held byAFNOR.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 February 1997, and confli
15、cting national standards shall be withdrawn at the latest by February 1997.This standard is part of a set of three standards which are the following:EN 683-1 : 1996 Aluminium and aluminiumalloys Finstock Part 1: Technical conditions for inspection and deliveryEN 683-2 : 1996 Aluminium and aluminium
16、alloys Finstock Part 2: Mechanical propertiesEN 683-3 : 1996 Aluminium and aluminium alloys Finstock Part 3: Tolerances on dimensions and formAccording to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standa
17、rd: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.Foreword 21 Scope 32 Normative references 33 Tolerances on dimensions and form 33.1 Gauge 33.2 Width 33.3 Lateral bow
18、 4Page 3EN 683-3 : 19961 ScopeThis Part of EN 683 specifies the requirements for tolerances on dimensions and form for aluminium and aluminium alloy finstock supplied in accordance with EN 683-1.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from
19、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 onlywhen incorporated in it by amendment
20、or revision. For undated references the latest edition of the publication referred to applies.EN 683-1 : 1996Aluminium and aluminium alloys Finstock Part 1: Technical conditions for inspection and delivery3 Tolerances on dimensions and form3.1 Gauge3.1.1 Single gauge measurementThe tolerance on gaug
21、e for a single measurement for finstock shall be 6 % at 95 % confidence limits.Gauge can be measured with any of the usual precision instruments capable of assessing finstock thickness but, in the event of dispute, the weighing method shall be used as a referee procedure.Description of the weighing
22、method: From the test sample, cut an area (A) ofapproximately 1 dm2 either square or circular. Degreasethe sample if necessary in a suitable solvent and weigh on a laboratory balance with an accuracy of equal toor better than 1 mg. The dimensions of the sample (sides of square or diameter of circle)
23、 shall be measured to an accuracy of equal or better than0,1 mm.Gauge shall be calculated by use of the formula:E = M10 3 A 3 Dwhere:E is the gauge in micrometres;M is the mass in milligrams;Dis the density as defined in table 2, in grams per cubic centimetre;A is the area in square decimetres.3.1.2
24、 Mean gauge measurementThe tolerance on gauge for a mean measurement is specified in table 1.Table 1. Tolerances on mean measurement of gauge for finstockLot sizekgLimit deviations# 3000 3000 to # 10000 100005% 4% 3% Mean gauge may be obtained by either:a) CalculationCalculation of mean gauge by thi
25、s method requires an accurate knowledge of length and net weight of the reels. The mean gauge shall be calculated by the formula:mE = P 3 106L 3 W 3 Dwhere:Em is the mean gauge in micrometres;Pis the net mass in kilograms;L is the length in metres;W is the width in millimetres;Dis the density as def
26、ined in table 2, in grams per cubic centimetre.Table 2. DensityMaterialDensityg/cm3EN AW-1050A EN AW-1100EN AW-1200EN AW-3003EN AW-3103EN AW-5005EN AW-6063EN AW-6951EN AW-6060EN AW-8011A EN AW-8006EN AW-80792,702,712,712,732,732,692,702,702,702,712,742,71b) Averaging spot measurementsThe method shal
27、l be agreed between purchaser and supplier.3.2 WidthThe tolerance on width is specified in table 3.Page EN 683-3 : 1996BSI 1997Table 3. Tolerance on widthWidthmmLimit deviationsmmSymmetricalOnly plusOnly minus# 100 100 to # 350 350 to # 1000 10000,20,30,51,0+0,40+0,60+1,00+2,00020,4020,6021,0022,0Un
28、less otherwise specified in the order, the type of limit deviations is at the discretion of the supplier.3.3 Lateral bowd3.3.1 Test procedureLateral bow shall be measured on finstock with a width greater than 100 mm; on narrow width finstock(width between 20 mm and 100 mm), this measurement shall be
29、 carried out only if required by the purchaser. One of the following measurement procedures shall be used.a) Take a sample from the first set of slit reels produced from the parent coil. Cut two 1 m lengths from that sample. Place the two lengths back to back on a flat surface. Measure the maximum d
30、istance 2d between the two lengths as shown in figure 1.b) Take a sample from the first set of slit reels. Measure the lateral bow d against a straight edge as shown on figure 2 on a length of 1 m.3.3.2 Test resultsThe lateral bow is defined as the distance d and expressed in millimetres per 1000 mm
31、.3.3.3 Acceptance criteriaThe maximal lateral bow shall not exceed 2 mm per 1000 mm.11 m2 dFigure 1. Measurement of lateral bow: method a)11 mFigure 2. Measurement of lateral bow: method b)BS EN 683-3 : 1997List of referencesSee national foreword.BSI389 Chiswick High RoadLondonW4 4AL| BSI British St
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