1、BRITISH STANDARD BS EN ISO 868:2003 Incorporating Corrigendum No. 1 Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness) The European Standard EN ISO 868:2003 has the status of a British Standard ICS 83.080.01 BS EN ISO 868:2003 This British Standard wa
2、s published under the authority of the Standards Policy and Strategy Committee on 25 April 2003 BSI 11 July 2003 ISBN 0 580 41701 8 National foreword This British Standard is the official English language version of EN ISO 868:2003. It is identical with ISO 868:2002. It supersedes BS EN ISO 868:1998
3、 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/21, Plastics test methods, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards
4、which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publ
5、ication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible internatio
6、nal/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO ti
7、tle page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 5, the Annex ZA page, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14
8、577 Corrigendum No. 1 11 July 2003 Replacing the EN ISO foreword page and incorporating the Annex ZA pageEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO868 March2003 ICS83.080.01 SupersedesENISO868:1997 Englishversion PlasticsandeboniteDeterminationofindentationhardnessby meansofadurometer(Shor
9、ehardness)(ISO868:2003) PlastiquesetboniteDterminationdeladuretpar pntrationaumoyendunduromtre(duretShore)(ISO 868:2003) KunststoffeundHartgummiBestimmungder EindruckhrtemiteinemDurometer(ShoreHrte)(ISO 868:2003) ThisEuropeanStandardwasapprovedbyCENon2January2003. CENmembersareboundtocomplywiththeCE
10、N/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexists
11、inthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finl
12、and,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,SlovakRepublic,Spain,Sweden,Switzerland and UnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels
13、2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO868:2003ECORRECTED20030625 Foreword Thisdocument(ENISO868:2003)hasbeenpreparedbyTechnicalCommitteeISO/TC61 “Plastics“incollaborationwithTechnicalCommitteeCEN/TC249“Plastics“,thesecretariatof whi
14、chisheldbyIBN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbySeptember2003,andconflictingnational standardsshallbewithdrawnatthelatestbySeptember2003. ThisdocumentsupersedesENISO868:1997. AccordingtotheCEN/CENELECIntern
15、alRegulations,thenationalstandardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnit
16、edKingdom. Endorsementnotice ThetextofISO868:2003hasbeenapprovedbyCENasENISO868:2003withoutany modifications. NOTENormativereferencestoInternationalStandardsarelistedinAnnexZA(normative). ENISO868:2003 INTERNATIONAL STANDARD ISO 868 Third edition 2003-03-01 Reference number ISO 868:2003(E) Plastics
17、and ebonite Determination of indentation hardness by means of a durometer (Shore hardness) Plastiques et bonite Dtermination de la duret par pntration au moyen dun duromtre (duret Shore)ENISO868:2003 ISO :868(3002)E ii FDP dicslaimre This FDP fam elitnoc yt deddebme niayfep.seca In roccatiw ecnadA h
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22、l + 22 14 10 947 11 Fax + 14 47 2290 9 74 E-liam copyrightsio.ch Web wwwsi.oc.h Prni detni Sztiwerldna ENISO868:2003 iii Contents Page 1 Scope . 1 2 Normative reference . 1 3 Principle 1 4 Apparatus . 1 5 Test specimens . 4 6 Calibration 4 7 Conditioning and testing atmospheres . 4 8 Procedure . 5 9
23、 Test report 5 ENISO868:2003 iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body inter
24、ested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
25、 Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publicatio
26、n as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such
27、 patent rights. International Standard ISO 868 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties. This third edition cancels and replaces the second edition (ISO 868:1985), which has been technically revised. ENISO868:2003 ANRETNIITOTS LANDNADRA OSI 86
28、83002:)E(1 Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness) 1 Scope 1.1 This International Standard specifies a method for the determination of the indentation hardness of plastics and ebonite by means of durometers of two types: type A is used for
29、softer materials and type D for harder materials (see the Note to 8.2). The method permits measurement either of the initial indentation or of the indentation after a specified period of time, or both. NOTE The durometers and the methods specified in this International Standard are referred to as ty
30、pe A Shore and type D Shore durometers and durometer methods, respectively. 1.2 This method is an empirical method intended primarily for control purposes. No simple relationship exists between indentation hardness determined by this method and any fundamental property of the material tested. For sp
31、ecification purposes, it is recommended that ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD), be used for the softer materials. 2 Normative reference The following normative document contains provisions which, through reference in this te
32、xt, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, this publication do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edit
33、ion of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 291:1997, Plastics Standard atmospheres for conditioning and testing 3 Pr
34、inciple A specified indenter is forced into the test material under specified conditions and the depth of penetration measured. The indentation hardness is inversely related to the penetration and is dependent on the modulus of elasticity and the viscoelastic properties of the material. The shape of
35、 the indenter, the force applied to it and the duration of its application influence the results obtained so that there may be no simple relationship between the results obtained with one type of durometer and those obtained with either another type of durometer or another instrument for measuring h
36、ardness. 4A p p a r a t u s Use either a type A or type D Shore durometer consisting of the following components: 4.1 Presser foot, with a hole of diameter centred at least from any edge of the foot. 4.2 Indenter, formed from a hardened steel rod of diameter to the shape and dimensions shown in Figu
37、re 1 for type A durometers and Figure 2 for type D durometers. 3mm 0,5 mm 6 mm 1,25 mm 0,15 mm ENISO868:2003 2 4.3 Indicating device, for reading the extent of protrusion of the point of the indenter beyond the face of the presser foot; this may be read directly in terms of units ranging from 0 for
38、the full protrusion of to 100 for nil protrusion obtained by placing the pressure foot and indenter in firm contact with a flat piece of glass. NOTE The device may include means for indicating the initial indentation obtained when the indenter is applied under load, to provide a maximum reading for
39、use as an instantaneous reading if required (see 8.1). Dimensions in millimetres Key 1p r e s s e r f o o t 2 indenter a full protrusion: Figure 1 Indenter for type A durometer 2,5 mm 0,04 mm 2,50 mm 0,04 mm ENISO868:2003 3 4.4 Calibrated spring, for applying force to the indenter in accordance with
40、 one of the following equations: (1) where is the applied force, in millinewtons; is the hardness reading on the type A durometer or (2) where is the applied force, in millinewtons; is the hardness reading on the type D durometer. Dimensions in millimetres Key 1 presser foot 2 indenter a full protru
41、sion: Figure 2 Indenter for type D durometer 2,5 mm 0,04 mm F = 550+ 75H A F H A F = 445H D F H D ENISO868:2003 4 5 Test specimens 5.1 The thickness of the test specimen shall be at least . A test specimen may be composed of thinner layers to obtain the necessary thickness, but determinations made o
42、n such test specimens may not agree with those made on one-piece test specimens because the surfaces between the plies may not be in complete contact. 5.2 The dimensions of the test specimen shall be sufficient to permit measurements at least away from any edge, unless it is known that identical res
43、ults are obtained when measurements are made at a lesser distance from an edge. The surface of the test specimen shall be flat over an area sufficient to permit the presser foot to be in contact with the test specimen over an area having a radius of at least from the indenter point. Satisfactory dur
44、ometer hardness determinations cannot be made on rounded, uneven or rough surfaces. 6C a l i b r a t i o n The spring (4.4) of the durometer is calibrated by supporting the durometer in a vertical position and resting the point of the indenter (4.2) on a small metal spacer at the centre of one pan o
45、f a balance, as shown in Figure 3, in order to prevent interference between the presser foot (4.1) and the pan. The spacer has a small cylindrical stem of height approximately and diameter approximately , and is slightly cupped on top to accommodate the indenter point. The mass of the spacer is bala
46、nced by a weight on the opposite pan of the balance. Weights are added to the opposite pan to balance the force on the indenter at various scale readings. The measured force shall be equal to the force calculated by either equation (1) to within or equation (2) to within . Instruments specifically d
47、esigned for calibration of durometers may be used. Balances or instruments used for calibration shall be capable of measuring or applying a force on the point of the indenter to within for the type A durometer and to within for the type D durometer. 7 Conditioning and testing atmospheres 7.1 For mat
48、erials whose hardness is not dependent on the relative humidity, the durometer and test specimens shall be conditioned at the temperature of test (see 7.2) for at least before testing. For materials whose hardness is dependent on the relative humidity, the test specimens shall be conditioned in accordance with ISO 291, or in accordance with the relevant material specificatio
