BS EN ISO 148-3-2016 Metallic materials Charpy pendulum impact test Preparation and characterization of Charpy V-notch test pieces for indirect verification of pendulum impact mach.pdf

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1、BS EN ISO 148-3:2016Metallic materials Charpy pendulum impact testPart 3: Preparation and characterization of Charpy V-notch test pieces for indirect verification of pendulum impact machines(ISO 148-3:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 148

2、-3:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 148-3:2016.It supersedes BS EN ISO 148-3:2008 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/101/4, Toughness testing.A list of organizations represen

3、ted on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI Standards Limited 2016ISBN 978 0 580 842

4、78 8ICS 77.040.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2016.Amendments/Corrigenda issued since publicationDate Text affectedEUROPEAN STANDARD

5、 NORME EUROPENNE EUROPISCHE NORM EN ISO 148-3 November 2016 ICS 77.040.10 Supersedes EN ISO 148-3:2008English Version Metallic materials - Charpy pendulum impact test - Part 3: Preparation and characterization of Charpy V-notch test pieces for indirect verification of pendulum impact machines (ISO 1

6、48-3:2016) Matriaux mtalliques - Essai de flexion par choc sur prouvette Charpy - Partie 3: Prparation et caractrisation des prouvettes Charpy entaille en V pour la vrification indirecte des machines dessai mouton-pendule (ISO 148-3:2016) Metallische Werkstoffe - Kerbschlagbiegeversuch nach Charpy -

7、 Teil 3: Vorbereitung und Charakterisierung von Charpy-V-Referenzproben fr die indirekte Prfung der Prfmaschinen (Pendelschlagwerke) (ISO 148-3:2016) This European Standard was approved by CEN on 20 August 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulat

8、e the conditions for giving this European Standard the status 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 Stan

9、dard exists in three official versions (English, French, German). 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 nat

10、ional standards bodies of Austria, Belgium, Bulgaria, Croatia, 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, Sl

11、ovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION 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 mea

12、ns reserved worldwide for CEN national Members. Ref. No. EN ISO 148-3:2016 EBS EN ISO 148-3:2016EN ISO 148-3:2016 (E) 3 European foreword This document (EN ISO 148-3:2016) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals” in collaboration with Technical Committee ECI

13、SS/TC 101 “Test methods 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 stan

14、dards shall be withdrawn 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 14

15、8-3:2008. According to 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, F

16、rance, Germany, Greece, 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 148-3:2016 has been approved by CEN as EN

17、ISO 148-3:2016 without any modification. BS EN ISO 148-3:2016ISO 148-3:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 13.1 Definitions pertaining to the machine 13.2 Definitions pertaining to energy 23.3 Definitions related to groups of test pieces 23.4

18、Definitions pertaining to test pieces 24 Symbols and abbreviated terms . 35 Reference testing machine . 45.1 Characteristics . 45.1.1 General 45.1.2 Geometrical characteristics (see Table 2 and Figures 1 and 2) . 55.1.3 Capacity . 55.1.4 Hardness . 55.1.5 Vibration . 65.1.6 Energy-indicating mechani

19、sm . 65.2 Verification of reference testing machine 66 Reference test pieces 66.1 General . 66.2 Material . 66.3 Dimensions . 76.4 Marking . 76.5 Qualification of a batch of reference test pieces . 76.6 Reference test piece sets . 87 Certificates for reference test pieces . 88 Notes for using sets o

20、f reference test pieces 8Annex A (informative) Uncertainty of the certified KV value of Charpy reference materials 11Bibliography .18 ISO 2016 All rights reserved iiiContents PageBS EN ISO 148-3:2016ISO 148-3:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide fede

21、ration of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that commi

22、ttee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and

23、 those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for 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

24、 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. 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

25、 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 document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms

26、 and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the 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, Mec

27、hanical testing of metals, Subcommittee SC 4, Toughness testing Fracture (F), Pendulum (P), Tear (T) .This third edition cancels and replaces the second edition (ISO 148-3:2008), which has been technically revised.ISO 148 consists of the following parts, under the general title Metallic materials Ch

28、arpy pendulum impact test: Part 1: Test method Part 2: Verification of testing machines Part 3: Preparation and characterization of Charpy V-notch test pieces for indirect verification of pendulum impact machinesiv ISO 2016 All rights reservedBS EN ISO 148-3:2016ISO 148-3:2016(E)IntroductionThe suit

29、ability 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 compliance with specified dimensions, such as the shape and spacing of the anvils supporting the test piece. The scale calibration is com

30、monly 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 requiring only measurements of quantities that could be traced to national standards. The objective nature of these traceable meas

31、urements minimized the necessity for arbitration regarding the suitability of the machines for material acceptance tests.However, sometimes two machines that had been evaluated by the direct-verification procedures described above, and which met all dimensional requirements, were found to give signi

32、ficantly different impact values when testing test pieces of the same material.This difference was commercially important when values obtained using one machine met the material specification, while the values obtained using the other machine did not. To avoid such disagreements, some purchasers of

33、materials added the requirement that all pendulum impact testing machines used for acceptance testing of material sold to them should be indirectly verified by testing reference test pieces supplied by them. A machine was considered acceptable only if the values obtained using the machine agreed, wi

34、thin specified limits, with the value furnished with the reference test pieces.Successful experience in the use of reference test pieces led to the requirement in ISO 148-2 that indirect verification should be performed using reference test pieces in addition to direct verification. Other standards

35、and codes also require indirect verification using reference test pieces; for example, EN 10045-21(now obsolete) and ASTM E232require the use of reference test pieces. The purpose of this part of ISO 148 is to specify the requirements, preparation and methods for qualifying test pieces used for the

36、indirect verification of pendulum impact testing machines. ISO 2016 All rights reserved vBS EN ISO 148-3:2016BS EN ISO 148-3:2016Metallic materials Charpy pendulum impact test Part 3: Preparation and characterization of Charpy V-notch test pieces for indirect verification of pendulum impact machines

37、1 ScopeThis part of ISO 148 specifies the requirements, preparation and methods for qualifying test pieces used for the indirect verification of pendulum impact testing machines in accordance with ISO 148-2.It specifies notched test pieces with nominal dimensions identical to those specified in ISO

38、148-1; however, the tolerances are more stringent.NOTE 1 The chemical composition or heat treatment, or both, are varied according to the energy level desired.NOTE 2 Reference test pieces are qualified on reference pendulum impact testing machines which are also described in this part of ISO 148.2 N

39、ormative referencesThe following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including an

40、y amendments) applies.ISO 148-1, Metallic materials Charpy pendulum impact test Part 1: Test methodISO 148-2, Metallic materials Charpy pendulum impact test Part 2: Verification of testing machines3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1

41、 Definitions pertaining to the machine3.1.1industrial machinependulum impact testing machine used for industrial, general or most research-laboratory testing of metallic materialsNote 1 to entry: These machines are not used to establish reference values.3.1.2reference machinependulum impact testing

42、machine used to determine certified values for batches of reference test piecesINTERNATIONAL STANDARD ISO 148-3:2016(E) ISO 2016 All rights reserved 1BS EN ISO 148-3:2016ISO 148-3:2016(E)3.2 Definitions pertaining to energy3.2.1total absorbed energyKTtotal absorbed energy required to break a test pi

43、ece with a pendulum impact testing machine, which is not corrected for any losses of energyNote 1 to entry: It is equal to the difference in the potential energy from the starting position of the pendulum to the end of the first half swing during which the test piece is broken.3.2.2absorbed energyKe

44、nergy required to break a test piece with a pendulum impact testing machine, after correction for energy lossesNote 1 to entry: The letter V or U is used to indicate the notch geometry, i.e. KV or KU. The number 2 or 8 is used as a subscript to indicate the radius of the striking edge of the striker

45、, for example KV2.3.2.3reference absorbed energyKRcertified value of absorbed energy assigned to the test pieces used to verify the performance of pendulum impact testing machines3.3 Definitions related to groups of test pieces3.3.1batchdefinite quantity of reference test pieces manufactured under i

46、dentical conditions of production, with a common certified absorbed energy3.3.2setgroup of test pieces chosen at random from a batch3.3.2.1characterization setset of test pieces taken from a batch and used to determine the reference energy of the batch3.3.2.2reference setset of test pieces used to v

47、erify a pendulum impact testing machine3.4 Definitions pertaining to test pieces3.4.1widthWdistance between the notched face and the opposite faceNote 1 to entry: In previous versions of the ISO 148 series (prior to 2016), the distance between the notched face and the opposite face was specified as

48、“height”. Changing this dimension to “width” makes ISO 148-1 consistent with the terminology used in other ISO fracture standards.2 ISO 2016 All rights reservedBS EN ISO 148-3:2016ISO 148-3:2016(E)3.4.2thicknessBdimension perpendicular to the width and parallel to the notchNote 1 to entry: In previo

49、us versions of the ISO 148 series (prior to 2016), the dimension perpendicular to the width that is parallel to the notch was specified as “width”. Changing this dimension to “thickness” makes ISO 148-1 consistent with the terminology used in other ISO fracture standards.3.4.3lengthLlargest dimension perpendicular to the notch3.4.4reference test pieceimpact test piece used to verify the suitability of a pendulum impact testing machine by comparing the indicated absorbed energy measured by that machine to the reference absorbed