EN ISO 14556:2015

SLOVENSKI STANDARD
01-januar-2016
1DGRPHãþD
SIST EN ISO 14556:2001
SIST EN ISO 14556:2001/A1:2007
Kovinski materiali - Udarni preskus žilavosti po Charpyju (V-zareza) -
Instrumentirana preskusna metoda (ISO 14556:2015)
Metallic materials - Charpy V-notch pendulum impact test - Instrumented test method
(ISO 14556:2015)
Metallische Werkstoffe - Kerbschlagbiegeversuch nach Charpy (V Kerb) -
Instrumentiertes Prüfverfahren (ISO 14556:2015)
Matériaux métalliques - Essai de flexion par choc sur éprouvette Charpy à entaille en V -
Méthode d'essai instrumenté (ISO 14556:2015)
Ta slovenski standard je istoveten z: EN ISO 14556:2015
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 14556
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2015
EUROPÄISCHE NORM
ICS 77.040.10 Supersedes EN ISO 14556:2000
English Version
Metallic materials - Charpy V-notch pendulum impact test
- Instrumented test method (ISO 14556:2015)
Matériaux métalliques - Essai de flexion par choc sur Metallische Werkstoffe - Kerbschlagbiegeversuch nach
éprouvette Charpy à entaille en V - Méthode d'essai Charpy (V-Kerb) - Instrumentiertes Prüfverfahren (ISO
instrumenté (ISO 14556:2015) 14556:2015)
This European Standard was approved by CEN on 3 July 2015.

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 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, 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 national 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14556:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 14556:2015) has been prepared by Technical Committee ISO/TC 164
“Mechanical testing of metals” in collaboration with Technical Committee ECISS/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 April 2016, and conflicting national standards shall be
withdrawn at the latest by April 2016.
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 14556:2000.
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,
France, 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 14556:2015 has been approved by CEN as EN ISO 14556:2015 without any modification.
INTERNATIONAL ISO
STANDARD 14556
Second edition
2015-09-01
Metallic materials — Charpy
V-notch pendulum impact test —
Instrumented test method
Matériaux métalliques — Essai de flexion par choc sur éprouvette
Charpy à entaille en V — Méthode d’essai instrumenté
Reference number
ISO 14556:2015(E)
©
ISO 2015
ISO 14556:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved

ISO 14556:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Characteristic values of force. 1
3.2 Characteristic values of displacement . 2
3.3 Characteristic values of impact energy . 2
4 Symbols and abbreviated terms . 2
5 Principle . 3
6 Apparatus . 4
7 Test piece . 6
8 Test procedure . 6
9 Expression of results . 6
9.1 General . 6
9.2 Evaluation of the force-displacement curve . 7
9.3 Determination of the characteristic values of force . 7
9.4 Determination of the characteristic values of displacement . 7
9.5 Determination of the characteristic values of impact energy . 9
10 Test report . 9
Annex A (informative) Designs of instrumented strikers .11
Annex B (informative) Example of support block for the calibration of a 2 mm striker .12
Annex C (informative) Formulae for the estimation of the proportion of ductile fracture surface 13
Annex D (normative) Instrumented Charpy V-notch pendulum impact testing of miniature
test pieces .14
Bibliography .20
ISO 14556:2015(E)
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 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 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 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. 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 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 and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 164, Mechanical testing of metals, Subcommittee
SC 4, Toughness testing.
This second edition cancels and replaces the first edition (ISO 14556:2000), which has been
technically revised.
iv © ISO 2015 – All rights reserved

INTERNATIONAL STANDARD ISO 14556:2015(E)
Metallic materials — Charpy V-notch pendulum impact test
— Instrumented test method
1 Scope
This International Standard specifies a method of instrumented Charpy V-notch pendulum impact testing
on metallic materials and the requirements concerning the measurement and recording equipment.
With respect to the Charpy pendulum impact test described in ISO 148-1, this test provides further
information on the fracture behaviour of the product under impact testing conditions.
General information about instrumented impact testing can be found in Reference [1] to Reference [5].
2 Normative references
The following 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 any amendments) applies.
ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method.
ISO 148-2, Metallic materials — Charpy pendulum impact test — Part 2: Verification of testing machines.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 Characteristic values of force
3.1.1
general yield force
F
gy
force at the transition point from the linearly increasing part to the curved increasing part of the force-
displacement curve
Note 1 to entry: It represents a first approximation of the force at which yielding has occurred across the entire
test piece ligament (see 9.3).
3.1.2
maximum force
F
m
maximum force in the course of the force-displacement curve
3.1.3
unstable crack initiation force
F
iu
force at the beginning of the s
...