1、May 2017 English price group 18No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77.040.10!%db“2659563www.din.deDIN E
2、N ISO 148-2Metallic materials Charpy pendulum impact test Part 2: Verification of testing machines (ISO 1482:2016);English version EN ISO 1482:2016,English translation of DIN EN ISO 148-2:2017-05Metallische Werkstoffe Kerbschlagbiegeversuch nach Charpy Teil 2: berprfung der Prfmaschinen (Pendelschla
3、gwerke) (ISO 1482:2016);Englische Fassung EN ISO 1482:2016,Englische bersetzung von DIN EN ISO 148-2:2017-05Matriaux mtalliques Essai de flexion par choc sur prouvette Charpy Partie 2: Vrification des machines dessai (moutonpendule) (ISO 1482:2016);Version anglaise EN ISO 1482:2016,Traduction anglai
4、se de DIN EN ISO 148-2:2017-05SupersedesDIN EN ISO 1482:200909www.beuth.deDocument comprises 46 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.05.17 DIN EN ISO 148-2:2017-05 2 A comma is used as the decimal marker. National fo
5、reword This document (EN ISO 148-2:2016) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals”, Subcommittee SC 4 “Toughness testing Fracture (F), Pendulum (P), Tear (T)” in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemical
6、analysis)” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-01-44 AA “Impact testing of metals”. This standard includes a national footnote. To simplify i
7、ts application, in Annex B, Equation B.18, Table 1 including symbols and abbreviations has been referenced. Users of this standard should take note of the following: Compliance of the pendulum with this standard is determined by both calibration and verification. This International Standard does not
8、 give dimensions and tolerances for the clear distance between anvils when testing DVM or DVMK test pieces. This information is given in DIN EN ISO 148-1 Supplement 1:2014-02. In principle, DIN EN ISO 148-2 can also be applied to pendulum testing machines having a nominal initial potential energy lo
9、wer than 300 J (normal conditions). However, the present standard does not containdetailed requirements specifically for such small testing machines. Therefore, DIN 51222 will remainapplicable. It specifies requirements for and the verification of pendulum impact testing machines having a nominal en
10、ergy 50 J which are not covered by DIN EN ISO 148-2. In EN ISO 148-2 a differentiation is made between energy that is corrected for friction and energy that is not corrected for friction. The absorbed energy K is the energy required to break a test piece with a pendulum impact testing machine, with
11、correction for friction. The total absorbed energy KTis that energy including friction. Indicated absorbed energy (whether it is corrected for friction or not) is designated as Ks. Subclause 6.3.4 specifies that when the pendulum is hanging free it is to hang so that the striking edge is within 2,5
12、mm of the position where it would just touch the test specimen. This means that this distance can be null 2,5 mm. On the basis of the long-term experience of pendulum impact testing machines in Germany, NA 062-01-44 AA recommends that not only an indirect verification be carried out, but also a comp
13、lete direct verification (as opposed to the reduced direct verification specified) at intervals of one year so that a high level of trueness of the energy values can be achieved, thus ensuring the continuing reproducibility of energy results obtained for different machines using the same method unde
14、r the same test conditions. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 148-1 DIN EN ISO 148-1 ISO 148-3 DIN EN ISO 148-3 DIN EN ISO 148-2:2017-05 3 Amendments This standard differs from DIN EN ISO 148-2:2009-09 as follows: a) the G
15、erman translations of the terms “thickness” and “width” have been unified with standards from the field of fracture mechanics to read “Dicke” and “Breite”. b) 7.3 “Requirements for reference test pieces” has been revised; c) verifications to be performed and details regarding threshold values for un
16、certainty of measurement have been extended; d) requirements for and information on the frequency of verification have been revised; e) the standard has been editorially revised. Previous editions DIN 51222: 1954-08, 1957-01, 1968-11, 1973-11, 1979-01, 1985-01 DIN 51306: 1983-09 DIN EN 10045-2: 1993
17、-01 DIN EN ISO 148-2: 2009-06, 2009-09 National Annex NA (informative) Bibliography DIN EN ISO 148-1, Metallic materials Charpy pendulum impact test Part 1: Test method DIN EN ISO 148-3, Metallic materials Charpy pendulum impact test Part 3: Preparation and characterization of Charpy V-notch test pi
18、eces for indirect verification of pendulum impact machines DIN EN ISO 148-2:2017-05 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 148-2 November 2016 ICS 77.040.10 Supersedes EN ISO 148-2:2008English Version Metallic materials - Charpy pendulum impact te
19、st - Part 2: Verification of testing machines (ISO 148-2:2016) Matriaux mtalliques - Essai de flexion par choc sur prouvette Charpy - Partie 2: Vrification des machines dessai (mouton-pendule) (ISO 148-2:2016) Metallische Werkstoffe - Kerbschlagbiegeversuch nach Charpy - Teil 2: berprfung der Prfmas
20、chinen (Pendelschlagwerke) (ISO 148-2:2016) This European Standard was approved by CEN on 20 August 2016. 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 alteratio
21、n. 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, German). A version in any other language made by
22、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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, F
23、inland, 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 andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZA
24、TION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 148-2:2016 EEuropean foreword .3Introducti
25、on 51 Scope . 62 Normative references 63 Terms and definitions . 73.1 Definitions pertaining to the machine 73.2 Definitions pertaining to energy 83.3 Definitions pertaining to test pieces 94 Symbols and abbreviated terms . 95 Testing machine . 116 Direct verification 116.1 General 116.2 Foundation/
26、installation . 116.3 Machine framework . 126.4 Pendulum 136.5 Anvil and supports 166.6 Indicating equipment . 177 Indirect verification by use of reference test pieces 187.1 Reference test pieces used . 187.2 Absorbed energy levels. 187.3 Requirements for reference test pieces 187.4 Limited direct v
27、erification . 187.5 Bias and repeatability 187.5.1 Repeatability 187.5.2 Bias .198 Frequency of verification 199 Verification report .199.1 General 199.2 Direct verification 209.3 Indirect verification . 2010 Uncertainty 20Annex A (informative) Measurement uncertainty of the result of the indirect v
28、erification of a Charpy pendulum impact machine 26Annex B (informative) Measurement uncertainty of the results of the direct verification of a Charpy pendulum impact testing machine 30Annex C (informative) Direct method of verifying the geometric properties of pendulum impact testing machines using
29、a jig .37Bibliography .42Contents PageDIN EN ISO 148-2:2017-05 EN ISO 148-2:2016 (E) 2Foreword .4European foreword This document (EN ISO 148-2:2016) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals” in collaboration with Technical Committee ECISS/TC 101 “Test methods
30、 for steel (other than chemical analysis)” the secretariat of which is held by AFNOR. 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 May 2017, and conflicting national standards shall be withdraw
31、n at the latest by May 2017. 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. This document supersedes EN ISO 148-2:2008. According to
32、the CEN-CENELEC Internal Regulations, the national 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,
33、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 148-2:2016 has been approved by CEN as EN ISO 148-2:2016 without
34、any modification. DIN EN ISO 148-2:2017-05 EN ISO 148-2:2016 (E)3 ForewordISO (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 c
35、ommittees. Each 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 t
36、he International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for
37、the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
38、ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this doc
39、ument is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the
40、 Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 164, Mechanical testing of metals, Subcommittee SC 4, Toughness testing Fracture (F), Pendulum (P), Tear (T) .This third edition cancels and replaces the seco
41、nd edition (ISO 148-2:2008), which has been technically revised.ISO 148 consists of the following parts, under the general title Metallic materials Charpy pendulum impact test: Part 1: Test method Part 2: Verification of testing machines Part 3: Preparation and characterization of Charpy V-notch tes
42、t pieces for indirect verification of pendulum impact machinesDIN EN ISO 148-2:2017-05 EN ISO 148-2:2016 (E) 4 IntroductionThe suitability of a pendulum impact testing machine for acceptance testing of metallic materials has usually been based on a calibration of its scale and verification of compli
43、ance with specified dimensions, such as the shape and spacing of the anvils supporting the specimen. The scale calibration is commonly verified by measuring the mass of the pendulum and its elevation at various scale readings. This procedure for evaluation of machines had the distinct advantage of r
44、equiring only measurements of quantities that could be traced to national standards. The objective nature of these traceable measurements minimized the necessity for arbitration regarding the suitability of the machines for material acceptance tests.However, sometimes two machines that had been eval
45、uated by the direct-verification procedures described above, and which met all dimensional requirements, were found to give significantly different impact values when testing test pieces of the same material.This difference was commercially important when values obtained using one machine met the ma
46、terial specification, while the values obtained using the other machine did not. To avoid such disagreements, some purchasers of materials added the requirement that all pendulum impact testing machines used for acceptance testing of material sold to them are to be indirectly verified by testing ref
47、erence test pieces supplied by them. A machine was considered acceptable only if the values obtained using the machine agreed, within specified limits, with the value furnished with the reference test pieces.This part of ISO 148 describes both the original direct verification and the indirect verifi
48、cation procedures.DIN EN ISO 148-2:2017-05 EN ISO 148-2:2016 (E)5 1 ScopeThis part of ISO 148 covers the verification of pendulum-type impact testing machines, in terms of their constructional elements, their overall performance and the accuracy of the results they produce. It is applicable to machines with 2 mm or 8 mm strikers used for pendulum impact tests carried out, for instance, in accordance with ISO 148-1.It can be applied to pendulum impact testing machines of various capacities and of different de
