1、BRITISH STANDARDBS ISO 20753:2008Plastics Test specimensICS 83.080.01 BS EN ISO 20753:2014BS EN ISO 20753:2014ISBN 978 0 580 84181 1Amendments/corrigenda issued since publicationDate Comments31 May 2014 This corrigendum renumbers BS ISO 20753:2008 as BS EN ISO 20753:2014This British Standard was pub
2、lished under the authority of the Standards Policy and Strategy Committee on 30 April 2008 The British Standards Institution 2014. Published by BSI Standards Limited 2014National forewordThis British Standard is the UK implementation of BS EN ISO 20753:2014. It is identical to ISO 20753:2008. It sup
3、ersedes BS ISO 20753:2008, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/21, Testing of plastics.A list of organizations represented on this committee can be obtained on request to its secretary.The publication does not purport to include all the
4、 necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 20753 May 2014 ICS 83.080.01 English Version Plastics - Test specimens (ISO
5、 20753:2008) Plastiques - prouvettes (ISO 20753:2008) Kunststoffe - Probekrper (ISO 20753:2008) This European Standard was approved by CEN on 1 May 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta
6、tus 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, G
7、erman). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croa
8、tia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and U
9、nited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No.
10、EN ISO 20753:2014 Eii BS EN ISO 20753:2014EN ISO 20753:2014 (E)EN ISO 20753:2014 (E) 3 Foreword The text of ISO 20753:2008 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 20753:2014 by Technic
11、al Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN. 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 November 2014, and conflicting national standards shall be withdrawn at
12、the latest by November 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the na
13、tional standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, L
14、ithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 20753:2008 has been approved by CEN as EN ISO 20753:2014 without any modification. iiiContents PageForeword i
15、vIntroduction v1Scope . 12Normative references. 23Terms and definitions. 24Preparation of test specimens 34.1 General. 34.2 Injection moulding of test specimens 34.3 Compression moulding of test specimens 44.4 Preparation of test specimens by machining 45Types of test specimen and their dimensions.
16、45.1 Types of test specimen 45.2 Tensile test specimens with parallel-sided central section . 55.2.1 Multipurpose test specimens (type A1 and type A2) 55.2.2 Reduced-scale test specimens . 65.3 Bar test specimens (typeB) 75.4 Small tensile specimens (type C) 85.5 Plate specimens (type D) . 96Report
17、on preparation of test specimens. 9Annex A (informative) Recommended applications for multipurpose test specimens or partsthereof 11Annex B (normative) Designation system for test specimens 12Bibliography. 14BS ISO 20753:2008iiiContents PageForeword ivIntroduction .1Scope . 12Normative references .
18、23Terms and definitions.4Preparation of test specimens 34.1 General. 34.2 Injection moulding of test specimens 34.3 Compression moulding of test specimens 44.4 Preparation of test specimens by machining 45Types of test specimen and their dimensions.5.1 Types of test specimen 45.2 Tensile test specim
19、ens with parallel-sided central section . 55.2.1 Multipurpose test specimens (type A1 and type A2) 55.2.2 Reduced-scale test specimens . 65.3 Bar test specimens (typeB) 75.4 Small tensile specimens (type C) 85.5 Plate specimens (type D) . 96Report on preparation of test specimensAnnex A (informative
20、) Recommended applications for multipurpose test specimens or partsthereof 11Annex B (normative) Designation system for test specimens 12Bibliography. 14BS ISO 20753:2008mens BS EN ISO 20753:2014ISO 20753:2008iv Foreword ISO (the International Organization for Standardization) is a worldwide federat
21、ion of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member bodyinterested in a subject for which a technical committee has beenestablished has the right to be represented on that committee.
22、 International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closelywith the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance wit
23、h the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval
24、 by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20753 was prepared by Technical Committee
25、ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties. BS ISO 20753:2008vIntroduction Up to now, information on plastics test specimens has been specified in several different locations: in testmethod standards (e.g. ISO527-2), in ISO 3167 (for multipurpose test specimens) and in ISO 294-1,
26、ISO 294-2, ISO 294-3 and ISO 294-5 (for moulding conditions). The aim of this International Standard is to give the designations and dimensions of test specimens used for the acquisition of comparable data, and also other frequently used specimens, in one document for ease of reference. This will be
27、 followed by a revision ofthe ISO294 series, whichwill define onlythe injection-moulding conditions and will refer to this InternationalStandard for the dimensions of the specimens. Other International Standards that have hitherto used different designations for the same specimen type will alsoberev
28、ised to bring the designations into linewith those inthis International Standard.BS ISO 20753:2008BS EN ISO 20753:2014ISO 20753:20081Plastics Test specimens 1 Scope 1.1 This International Standard specifies dimensional requirements relating to test specimens preparedfrom plastics materials intended
29、for processing bymoulding, aswell as to test specimens prepared bymachining from sheets or shaped articles. It gives, in one document, the designations and dimensions of testspecimens used for the acquisition of comparable data and also other frequently used specimens. The following types of testspe
30、cimen are specified: a) Type A1 and type A2 specimens (1 = injection moulded, 2 = machined from a sheet or shaped article)These are tensile test specimens from which,with simple machining, specimens for a variety of othertests can be taken (see Annex A). The type A1 specimen corresponds to the ISO31
31、67:2002 type A multipurpose test specimen. Theprincipal advantage of a multipurpose test specimen is that it allows all the testmethodsmentioned inAnnex A to be carried out by all test laboratories on the basis of comparable mouldings. Consequently, the properties measured are coherent as all are me
32、asured using similar specimens prepared in the sameway. In other words, it can be expected that test results for a given set of specimens will not varyappreciablydue to unintentionally different moulding conditions. On the other hand, if desired, the influence ofmoulding conditions and/or different
33、states of the specimens can be assessed without difficulty for all of the properties measured. Alsodescribed are reduced-scale test specimens designated type Axy, where x is the number indicating the method of specimen preparation (1 = injection moulded, 2 = machined from a sheet or shaped article)a
34、nd y is a number indicating the scale factor (1:y). These can be used e.g. when full-sized test specimens are not convenient orwhen sample material exists in small quantities only. b) Type B specimensThese are bar specimens which can be directly moulded or can be machined from the central section of
35、 type A1 specimens or from sheets or shaped articles. c) Type C specimensThese are small tensile test specimens which can be directly moulded or machined, e.g. from plates (Type D specimens), from the central section of type A1 specimens or from sheets or shaped articles. d) Type D1 and type D2 spec
36、imensThese are square plates of thickness 1 mm and 2 mm, respectively. If a particular type of test specimen is not mentioned in this International Standard, this does not mean that there is any intention to exclude the use of the specimen. Additional specimen types may be added in future if they ar
37、e commonly used. BS ISO 20753:2008BS EN ISO 20753:2014ISO 20753:20082 2 NormativereferencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocum
38、ent (including any amendments) applies.ISO 293, Plastics Compression moulding of test specimens of thermoplastic materialsISO 294-1, Plastics Injection moulding of test specimens of thermoplastic materials Part1: Generalprinciples, and moulding of multipurpose and bar testspecimensISO 295, Plastics
39、Compression moulding of test specimens of thermosetting materialsISO 2818, Plastics Preparation of test specimens by machiningISO 10350-1, Plastics Acquisition and presentation of comparable single-point data Part1:Moulding materialsISO 10350-2, Plastics Acquisition and presentation of comparable si
40、ngle-point data Part 2: Long-fibre-reinforced plasticsISO 10724-1, Plastics Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) Part 1: General principles and moulding of multipurpose test specimensISO 11403-1, Plastics Acquisition and presentation of comparable mu
41、ltipoint data Part 1: MechanicalpropertiesISO 11403-2, Plastics Acquisition and presentation of comparable multipoint data Part2: Thermal and processing propertiesISO 11403-3, Plastics Acquisition and presentation of comparable multipoint data Part3: Environmental influences on properties3 Terms and
42、 definitions For the purposes of this document, the following terms and definitions apply.3.1 multipurpose test specimentype A1 or type A2 tensile test specimen as shown in Figure1 and specified in Table 1 and Table 2, respectivelyNOTE 1Although ISO 3167:2002 refers to both the type A and type B spe
43、cimens, defined in that InternationalStandard, as multipurpose test specimens, for the purposes of this International Standard it is the type A1 specimen whichis the preferred specimen for the acquisition of comparable data and hence the true multipurpose test specimen. NOTE 2The type A1 specimen ca
44、n be made suitable for a variety of tests by simple cutting, because the length l1ofthe narrow parallel-sided section is 80 mm 2 mm. 3.2 l1length of the narrowparallel-sided section (central section) of the typeA and type CP tensile test specimens, the length of the type B bar specimen and the lengt
45、h of the side of the type D plate specimen 3.3 l2distance between the broad parallel-sided sections (tabs) of the type A and type CP tensile test specimensBS ISO 20753:2008BS EN ISO 20753:2014ISO 20753:200833.4 l3overall length of the type A and type C tensile test specimens3.5 b1width of the narrow
46、 parallel-sided section (central section) of the type A tensile test specimen, the minimumwidth of the type C test specimen and the length of the side of the type D plate specimen 3.6 b2width of the broad parallel-sided sections (tabs) of the type A and type C tensile test specimens3.7 rradius of th
47、e shoulder region of the type A and type C tensile test specimens3.8 hthickness of the test specimen 4 Preparation of test specimens4.1 General Test specimens shall be prepared in accordance with the relevant material specification. When none exists, specimens shall be either directly compression or
48、 injection moulded from the material in accordancewithISO 293, ISO294-1, ISO295 or ISO 10724-1, as appropriate, or machined in accordance with ISO 2818 fromsheets that have been compression or injection moulded from the compound, extruded from the compound orpolymerized and cast. Strict control of a
49、ll the specimen preparation conditions is essential to ensure that all test specimens in a setare in the same state. All surfaces of the test specimens shall be free from visible flaws, scratches or other imperfections. With moulded specimens, any flash present shall be completely removed, taking care not to damage the moulded surface. The broad sides of multipurpose test specimens shall be suitably marked
