National foreword

This British Standard is the UK implementation of EN ISO 14556:2023. It is identical to ISO 14556:2023. It supersedes BS EN ISO 14556:2015, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee ISE/101/4, Toughness testing.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2023.

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 of the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 4, Fatigue, fracture and toughness testing, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 459/SC 1, Test methods for steel (other than chemical analysis), in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This third edition cancels and replaces the second edition (ISO 14556:2015), which has been technically revised.

The main changes are as follows:

in Clause 1, a sentence was added to state that results shall not be directly used in design calculations;
in Clause 4, the symbol K_p (potential energy of the pendulum hammer) was added; the symbol KV (absorbed energy) was changed to K_V;
in 6.1 and D.2.1, the application of the “dynamic force adjustment” was added;
in 6.2.3, a generic statement about the stiffness of the support block was removed;
in 6.2.5, the possibility of directly determining characteristic values from printed graphs was removed;
in Clauses 7 and 8, statements referring to Annex D when testing miniature test pieces were added;
in 9.2, the characteristic values of force that can be evaluated from curves of Type A and B were changed;
in 9.3, it is now specified that F_m is determined after general yield;
in Figure 2, force-displacement curves in columns 3 (actual recording) were replaced with better-quality ones;
in Clause 10, a requirement to report the type of test piece (standard, subsize, or miniature) was added;
in Annex A, it was clarified that those shown are examples of instrumented strikers;
in Annex D, alternative miniature test pieces were removed;
in D.2.1, the deviation range between W_t and K_V was changed from ±0,5 J to ±10 % of K_V;
in D.3.1, dimensions for the standard miniature test piece were added; test temperature requirements were removed; the test report section was removed;
in the Bibliography, a new reference, [8], was added.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

This European Standard was approved by CEN on 16 April 2023.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.

European foreword

This document (EN ISO 14556:2023) has been prepared by Technical Committee ISO/TC 164 "Mechanical testing of metals" in collaboration with Technical Committee CEN/TC 459/SC 1 “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 November 2023, and conflicting national standards shall be withdrawn at the latest by November 2023.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 14556:2015.

Any feedback and questions on this document should be directed to the users’ national standards body/national committee. A complete listing of these bodies can be found on the CEN website.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United Kingdom.

Endorsement notice

The text of ISO 14556:2023 has been approved by CEN as EN ISO 14556:2023 without any modification.

1 Scope

This document 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.

The results of instrumented Charpy test analyses are not directly transferable to structures or components and shall not be directly used in design calculations or safety assessments.

NOTE General information about instrumented impact testing can be found in References [1] to [5].

2 Normative references

3 Terms and definitions

3.1 Characteristic values of force (see Figure 2)

3.2 Characteristic values of displacement (see Figure 2)

3.3 Characteristic values of impact energy

4 Symbols and abbreviated terms

5 Principle

5.1

5.2

6 Apparatus

6.1 Testing machine

6.2 Instrumentation and calibration

7 Test piece

8 Test procedure

9 Expression of results

9.1 General

9.2 Evaluation of the force-displacement curve

9.3 Determination of the characteristic values of force

9.4 Determination of the characteristic values of displacement

9.5 Determination of the characteristic values of impact energy

10 Test report

Bibliography

BS EN ISO 14556:2023

Metallic materials. Charpy V-notch pendulum impact test. Instrumented test method

Current

Published:

30 Jun 2023