EN ISO 10275:2020

SLOVENSKI STANDARD
01-december-2020
Nadomešča:
SIST EN ISO 10275:2014
Kovinski materiali - Pločevina in trakovi - Ugotavljanje koeficienta utrjevanja (ISO
10275:2020)
Metallic materials - Sheet and strip - Determination of tensile strain hardening exponent
(ISO 10275:2020)
Metallische Werkstoffe - Blech und Band - Bestimmung des Verfestigungsexponenten im
Zugversuch (ISO 10275:2020)
Matériaux métalliques - Tôles et bandes - Détermination du coefficient d'écrouissage en
traction (ISO 10275:2020)
Ta slovenski standard je istoveten z: EN ISO 10275:2020
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
77.140.50 Ploščati jekleni izdelki in Flat steel products and semi-
polizdelki products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 10275
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 77.040.10 Supersedes EN ISO 10275:2014
English Version
Metallic materials - Sheet and strip - Determination of
tensile strain hardening exponent (ISO 10275:2020)
Matériaux métalliques - Tôles et bandes - Metallische Werkstoffe - Blech und Band - Bestimmung
Détermination du coefficient d'écrouissage en traction des Verfestigungsexponenten im Zugversuch (ISO
(ISO 10275:2020) 10275:2020)
This European Standard was approved by CEN on 28 August 2020.

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, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10275:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 10275:2020) 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 March 2021, and conflicting national standards shall
be withdrawn at the latest by March 2021.
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 10275:2014.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 10275:2020 has been approved by CEN as EN ISO 10275:2020 without any modification.

INTERNATIONAL ISO
STANDARD 10275
Third edition
2020-08
Metallic materials — Sheet and strip
— Determination of tensile strain
hardening exponent
Matériaux métalliques — Tôles et bandes — Détermination du
coefficient d'écrouissage en traction
Reference number
ISO 10275:2020(E)
©
ISO 2020
ISO 10275:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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below or ISO’s member body in the country of the requester.
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 10275:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and designations . 2
5 Principle . 3
6 Test equipment. 3
7 Test pieces . 3
8 Procedure. 3
9 Test report . 7
Annex A (informative) International comparison of symbols used in the determination
of the tensile strain hardening exponent . 9
Bibliography .10
ISO 10275:2020(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 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 2, Ductility testing, in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 459, ECISS – European Committee for Iron and Steel Standardization,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 10275:2007), of which it constitutes a
minor revision.
The main changes compared to the previous edition are as follows:
— Clause 2 has been updated;
— new Clause 3 "Terms and definitions" has been added as per the latest Directives, Part 2;
— the symbol for true plastic strain has been changed from ε to ε ;
p
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.
iv © ISO 2020 – All rights reserved

ISO 10275:2020(E)
Introduction
In the previous edition of this document, for the calculation of the true strain, the elastic strain did not
need to be subtracted from the total strain if it was lower than 10 % of the total strain.
In this document, the elastic strain is subtracted from the total strain for calculation of the true strain,
which is now referred to as “true plastic strain”.
INTERNATIONAL STANDARD ISO 10275:2020(E)
Metallic materials — Sheet and strip — Determination of
tensile strain hardening exponent
1 Scope
This document specifies a method for determining the tensile strain hardening exponent n of flat
products (sheet and strip) made of metallic materials.
The method is valid only for that part of the stress-strain curve in the plastic range where the curve is
continuous and monotonic (see 8.4).
In the case of materials with a serrated stress-strain curve in the work hardening range (materials
which show the Portevin-Le Chatelier effect, e.g. AlMg-alloys), the automatic determination (linear
regression of the logarithm true stress vs. the logarithm true plastic strain, see 8.7) is used to give
reproducible results.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 9513, Metallic materials — Calibration of extensometer systems used in uniaxial testing
ISO 10113, Metallic materials — Sheet and strip — Determination of plastic strain ratio
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
ISO 10275:2020(E)
4 Symbols and designations
4.1 The symbols and corresponding designations used in determining the t
...