BS EN ISO 2039-1-2003 Plastics - Determination of hardness - Ball indentation method《塑料 硬度测定 压球法》.pdf

1、BRITISH STANDARD BS EN ISO 2039-1:2003 Incorporating Corrigendum No. 1 Plastics Determination of hardness Part 1: Ball indentation method The European Standard EN ISO 2039-1:2003 has the status of a British Standard ICS 83.080.01 BS EN ISO 2039-1:2003 This British Standard was published under the au

2、thority of the Standards Policy and Strategy Committee on 27 February 2003 BSI 3 April 2003 ISBN 0 580 41325 X National foreword This British Standard is the official English language version of EN ISO 2039-1:2003. It is identical with ISO 2039-1:2001. It supersedes BS EN ISO 2039-1:1997 which is wi

3、thdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/21, Plastic 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 which impleme

4、nt 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 publication does

5、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 international/European

6、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 title page, the

7、 EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 6, the Annex ZA page 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 14433 Corrigendum No. 1 3 April 2003

8、Corrected EN ISO foreword pageEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO20391 February2003 ICS83.080.01 SupersedesENISO20391:1996 Englishversion PlasticsDeterminationofhardnessPart1:Ballindentation method(ISO20391:2001) PlastiquesDterminationdeladuretPartie1:Mthode depntrationlabille(ISO20

9、391:2001) KunststoffeBestimmungderHrteTeil1: Kugeleindruckversuch(ISO20391:2001) ThisEuropeanStandardwasapprovedbyCENon12December2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyaltera

10、tion.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberinto

11、itsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,SlovakRepublic,Spain,Sweden,

12、Switzerland and UnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO20391:2003ECORRECTED2003

13、0205 Foreword ThetextofISO20391:2001hasbeenpreparedbyTechnicalCommitteeISO/TC61“Plastics“ oftheInternationalOrganizationforStandardization(ISO)andhasbeentakenoverasENISO 20391:2003byTechnicalCommitteeCEN/TC249“Plastics“,thesecretariatofwhichisheldby IBN. ThisEuropeanStandardshallbegiventhestatusofan

14、ationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbyAugust2003,andconflictingnational standardsshallbewithdrawnatthelatestbyAugust2003. ThisdocumentsupersedesENISO20391:1996. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollowingco

15、untriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnitedKingdom. Endorsementnotice ThetextofISO20391:2001hasbeenapprov

16、edbyCENasENISO20391:2003withoutany modifications. NOTENormativereferencestoInternationalStandardsarelistedinAnnexZA(normative). ENISO20391:2003 Reference number ISO 2039-1:2001(E)INTERNATIONAL STANDARD ISO 2039-1 Third edition 2001-12-01 Plastics Determination of hardness Part 1: Ball indentation me

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22、 iiiContents Page Foreword.iv 1 Scope 1 2 Normative reference1 3 Term and definition .1 4 Principle1 5 Apparatus .2 6 Test specimens2 7 Conditioning.2 8 Procedure .2 9 Expression of results 3 10 Test report 4 Annex A (informative) Value of the ball indentation hardness as a function of the depth of

23、penetration and the test load 5 ENISO20391:2003iv 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

24、 member body interested 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 Internationa

25、l Electrotechnical 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. The main task of technical committees is to prepare International Standards. Draft International Standards

26、 adopted by the technical committees are circulated to the member bodies for voting. Publication 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 part of ISO 2039 may be the su

27、bject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 2039-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties. This third edition cancels and replaces the second edition (ISO 2039-1:1993), subclau

28、se 8.3 and annex A of which have been technically revised. ISO 2039 consists of the following parts, under the general title Plastics Determination of hardness: Part 1: Ball indentation method Part 2: Rockwell hardness Annex A of this part of ISO 2039 is for information only. ENISO20391:2003INTENRAT

29、IONAL TSANDADR IS-9302 O1:(1002)E1Plastics Determination of hardness Part 1: Ball indentation method 1 Scope This part of ISO 2039 specifies a method for determining the hardness of plastics and ebonite by means of a loaded ball indenter. The ball indentation hardness determined by this method may p

30、rovide data for research and development, quality control and acceptance or rejection under specifications. 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this part of ISO 2039. For dated references, subseque

31、nt amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 2039 are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edi

32、tion 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 Term and definition For the purposes of this part of ISO 2039, the following term and d

33、efinition apply. 3.1 ball indentation hardness HB the quotient of the load on the ball indenter by the surface area of the impression caused by the ball indenter after a specified time of load application NOTE It is expressed in newtons per square millimetre. 4 Principle The method consists of forci

34、ng a ball under a specified load into the surface of the test specimen. The depth of impression is measured under load. The surface area of the impression is computed from its depth. The ball indentation hardness is then calculated from the following relationship: Ball indentation hardness = Applied

35、 load/Surface area of impression ENISO20391:20032 5 Apparatus 5.1 Hardness tester, consisting essentially of a frame with an adjustable platform fitted with a plate to support the test specimen, an indenter with its associated fittings and a device for applying the load without impact. The tester sh

36、all also be equipped with a device to measure the depth of penetration of the indenter over a range of 0,4 mm with an accuracy of 0,005 mm. The frame shall not be deformed under the maximum load by more than 0,05 mm, the deformation being measured along the main axis of the applied force. The indent

37、er shall be a hardened and polished steel ball. The ball shall not show any deformation or damage after the test. The diameter of the ball shall be (5,0 0,05) mm. 5.2 Timing device, accurate to 0,1 s 6 Test specimens Each test specimen shall be a smooth flat sheet or block of sufficient size to mini

38、mize edge effects on the test result; for example 20 mm 20 mm. The surfaces of the test specimen shall be parallel. A thickness of 4 mm is recommended. The supported surface of the test specimen shall not show any deformation after testing. NOTE 1 If test specimens with thicknesses less than 4 mm ar

39、e to be tested, it is possible to stack several test specimens on top of each other. However, hardness values obtained on stacked test specimens and on single test specimens of the same thickness may be different. NOTE 2 Although every effort should be made to ensure the parallelism of the specimen,

40、 there are some cases, especially specimens injection-moulded from semi-crystalline thermoplastics, where it is difficult to obtain test specimens that are exactly flat. If such slightly warped test specimens are used, part of the measured “depth of impression” will in fact correspond to the distanc

41、e travelled by the indenter in pressing the test specimen down on to the supporting plate. This difficulty can be overcome by using a circular supporting plate of diameter (10 1) mm. This diameter is also sufficiently large for perfectly flat test specimens. Also recommended is that the test specime

42、n be placed with the flatter side towards the support plate. 7 Conditioning Condition the test specimens, prior to testing, in one of the standard atmospheres specified in ISO 291. 8 Procedure 8.1 Unless otherwise specified, carry out the tests in the same atmosphere as was used for conditioning. 8.

43、2 Place the test specimen on the supporting plate so that the test specimen is fully supported and its surfaces are perpendicular to the direction of the applied load. Apply an initial load F 0of (9,8 0,1) N at a point not less than 10 mm from the edge of the test specimen. Set the depth-indicating

44、device to zero and then smoothly apply the test load F m(see 8.3) over a period of 2 to 3 s. ENISO20391:2003 38.3 Choose the test load F mfrom the values 49,0 N; 132 N; 358 N; 961 N (tolerance 1 %) such that the depth of impression h after correction for deformation of the frame (see 8.7) is between

45、 0,15 mm and 0,35 mm. If values of the depth of impression after 30 s are outside this range (either in the case of a series of test specimens or in the case of an individual test specimen), change the test load to obtain a depth of impression within the range specified above. The number of test mea

46、surements which do not give correct depths of impression shall be reported. If in a series of tests the test load has to be changed, the difference of hardness values occurring in the transition region between different test loads may lead to difficulties in the interpretation of the test results, e

47、.g. when assessing the influence of heat ageing on hardness. In such cases, it is acceptable, by agreement between the interested parties, to extend the range of depths of impression beyond the limits given above, but not by more than 20 % of the range. Use that test load for which the majority of d

48、epths of impression of the test series in question lie between 0,15 mm and 0,35 mm. 8.4 Carry out the test in such a manner that any bubbles or cracks in the test specimen do not influence the results. If several determinations are carried out on the same test specimen, ensure that the points of application of the indenter are not less