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1、BRITISH STANDARD BS EN 23369:1993 ISO 3369:1975 Impermeable sintered metal materials and hardmetals Determination of density The European Standard EN 23369:1993 has the status of a British Standard UDC 621.762.5:669-492.2:669.018.25:620.1:531.75 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03
2、 08:56:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 23369:1993 This British Standard, having been prepared under the direction of the Iron and Steel Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 June 1993 BSI 12-1999 The follo
3、wing BSI references relate to the work on this standard: Committee reference ISM/65 Special announcement in BSI News January 1993 ISBN 0 580 21938 0 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the
4、national standards organizations of the following countries: AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.
5、V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiser
6、ingsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments L
7、icensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 23369:1993 BSI 12-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 1Scope and field of application3 2References3 3Principle3 4Apparatus and mat
8、erials3 5Test piece3 6Procedure3 7Expression of results4 8Test report4 National annex NA (informative) Committees responsibleInside back cover National annex NB (informative) Cross-referenceInside back cover Figure 14 Figure 25 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:0
9、0 2006, Uncontrolled Copy, (c) BSI BS EN 23369:1993 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Iron and Steel Standards Policy Committee and is the English language version of EN 23369:1993 Impermeable sintered metal materials and hardmetals D
10、etermination of density, published by the European Committee for Standardization (CEN). It is identical with ISO 3369:1975, published by the International Organization for Standardization (ISO). This British Standard supersedes BS 5600-3.1:1979 and BS 5600-4.4:1979 which are withdrawn. This edition
11、makes no technical changes to these standards. 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 obligat
12、ions. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, 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 ame
13、ndment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 23369 April 1993 UDC 621.762.5:669-492.2:669.018.25:620.1:531.75 Descriptors: Powder metallurgy, har
14、d metals, sintered products, density (mass volume), measurements English version Impermeable sintered metal materials and hardmetals Determination of density (ISO 3369:1975) Matriaux en mtal fritt impermable et mtaux-durs Dtermination de la masse volumique (ISO 3369:1975) Undurchlssige Sintermetalle
15、 und Hartmetalle Ermittlung der Dichte (ISO 3369:1975) This European Standard was approved by CEN on 1993-04-02. 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 al
16、teration. 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 tra
17、nslation 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, Luxembo
18、urg, Netherlands, 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 1993 Copyright reserved to CEN members Ref. No. EN 2336
19、9:1993 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 23369:1993 BSI 12-1999 2 Foreword In 1992, ISO 3369:1975 Impermeable sintered metal materials and hardmetals Determination of density was submitted to the CEN Primary Questionnaire
20、procedure. Following the positive result of the CEN/CS Proposal ISO 3369:1975 was submitted to the Formal Vote. The result of the Formal Vote 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 la
21、test by October 1993, and conflicting national standards shall be withdrawn at the latest by October 1993. 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, I
22、reland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 23369:1993 BSI 12-19993 1 Scope and field of application This International Standard spe
23、cifies a method of determining the density of impermeable sintered metal materials and hardmetals. NOTEFor determination of density of permeable sintered metal materials, see ISO 2738, Permeable sintered metal materials Determination of density and open porosity. 2 References ISO. . ., Sintered meta
24、l materials, excluding hardmetals Sampling1). ISO. . ., Hardmetals Sampling and preparation of test pieces1). 3 Principle Weighing of a test piece first in air and then in a liquid, and determination of the density by calculation. 4 Apparatus and materials 4.1 Precision balance having a capacity whi
25、ch will permit readings within 0,1 mg on weighings up to 10 g and 0,001 % above 10 g. The weights shall be calibrated and have a density not less than 7 g/cm3. 4.2 Arrangement of racks or a suspension wire according to Figure 1 and Figure 2. In each case the suspension wire shall have a maximum diam
26、eter of 0,25 mm. Heavier gauge wire shall only be used if necessary to support the test piece. 4.3 Vessel for the weighing liquid. For test pieces of volume less than 10 cm3 the vessel shall be dimensioned so that when the test piece is lowered into the liquid the rise in liquid level is less than 2
27、,5 mm. 4.4 Distilled or de-ionized and preferably degassed water, to which 1 or 2 drops of a wetting agent have been added. The following values shall be used for the density in air, w, of distilled water: NOTE 1Other liquids may be used if their density in air at the testing temperature is known to
28、 four places of decimals. NOTE 2Using brass weights in air, the value of w is 0,001 06 g/cm3 smaller than the true density of water measured in a vacuum. 5 Test piece 5.1 Sampling shall be carried out in accordance with ISO. . . or ISO. . . 5.2 The volume of the test piece shall be at least 0,5 cm3.
29、 If it is required to determine the density of pieces having a volume less than 0,5 cm3, group several pieces together to make one determination, provided that each piece has a volume not less than 0,05 cm3. 5.3 The surface of the test piece shall be thoroughly cleaned from adhering foreign material
30、, such as dirt, grease and oil. 6 Procedure 6.1 Place the test piece in the upper rack (Figure 1) or pan (Figure 2). The lower rack shall be completely immersed and the suspension wire shall be hanging freely from the pan and partially immersed in the liquid. Remove all air bubbles and weigh (m1). 1
31、) In preparation. Temperaturew Cg/cm3 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 0,998 1 0,997 9 0,997 7 0,997 6 0,997 4 0,997 2 0,997 0 0,996 7 0,996 5 0,996 3 0,996 0 0,995 8 0,995 5 0,995 2 0,994 9 0,994 6 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:00 2006, Uncont
32、rolled Copy, (c) BSI EN 23369:1993 4 BSI 12-1999 6.2 Place the test piece on the lower rack (Figure 1) or suspend it by means of the wire (Figure 2). Lower the test piece into the vessel containing the liquid so that only the suspension wire breaks the surface of the liquid. Remove all air bubbles a
33、nd weigh. 6.3 Weighings up to 10 g shall be read to 0,1 mg and weighings above 10 g shall be read to 0,001 %. 6.4 The test piece, liquid and surrounding air shall be at the same temperature when weighing is carried out. The temperature of the liquid shall be determined. When distilled water is used,
34、 its density shall be taken from the table in 4.4. 7 Expression of results The density, , of the test piece, in grams per cubic centimetre, is given by the formula: where Report the result rounded to the nearest 0,01 g/cm3. 8 Test report The test report shall include the following information: a) re
35、ference to this International Standard; b) all details necessary for identification of the test sample; c) the result obtained; d) all operations not specified by this International Standard, or regarded as optional; e) details of any occurrence which may have affected the result.1is the density in
36、air of the liquid, in grams per cubic centimetre; m11 m2 - -= m1is the mass, in grams, of the test piece determined by weighing in air; m2is the mass, in grams, of the liquid displaced by the test piece, determined by subtracting the apparent mass of the test piece in the liquid from the mass of the
37、 test piece in air. Figure 1 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 23369:1993 BSI 12-19995 Figure 2 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy
38、: sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 23369:1993 BSI 12-1999 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Iron and Steel Standard
39、s Policy Committee (ISM/-) to Technical Committee ISM/65 upon which the following bodies were represented: British Hardmetal Association Federation of British Engineers (Test Manufacturers) Society of Motor Manufacturers and Traders Limited Coopted member National annex NB (informative) Cross-refere
40、nce Publication referred toCorresponding British Standard ISO 2738:1973BS 5600 Powder metallurgical materials and productions Part 3 Methods of testing sintered metal materials and products, excluding hardmetals Section 3.2:1988 Determination of density, oil content and open porosity Licensed Copy:
41、sheffieldun sheffieldun, na, Fri Nov 03 08:56:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 23369:1993 ISO 3369:1975 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK v
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