EN ISO 204:2018

SLOVENSKI STANDARD
01-december-2018
1DGRPHãþD
SIST EN ISO 204:2011
Kovinski materiali - Preskušanje nesoosnega lezenja pri nategu - Metoda
preskušanja (ISO 204:2018)
Metallic materials - Uniaxial creep testing in tension - Method of test (ISO 204:2018)
Metallische Werkstoffe - Einachsiger Zeitstandversuch unter Zugbeanspruchung -
Prüfverfahren (ISO 204:2018)
Matériaux métalliques - Essai de fluage uniaxial en traction - Méthode d'essai (ISO
204:2018)
Ta slovenski standard je istoveten z: EN ISO 204:2018
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 204
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2018
EUROPÄISCHE NORM
ICS 77.040.10 Supersedes EN ISO 204:2009
English Version
Metallic materials - Uniaxial creep testing in tension -
Method of test (ISO 204:2018)
Matériaux métalliques - Essai de fluage uniaxial en Metallische Werkstoffe - Einachsiger Zeitstandversuch
traction - Méthode d'essai (ISO 204:2018) unter Zugbeanspruchung - Prüfverfahren (ISO
204:2018)
This European Standard was approved by CEN on 12 August 2018.

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, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 204:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 204:2018) 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 2019, and conflicting national standards shall be
withdrawn at the latest by April 2019.
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 204:2009.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 204:2018 has been approved by CEN as EN ISO 204:2018 without any modification.

INTERNATIONAL ISO
STANDARD 204
Third edition
2018-08
Metallic materials — Uniaxial creep
testing in tension — Method of test
Matériaux métalliques — Essai de fluage uniaxial en traction —
Méthode d'essai
Reference number
ISO 204:2018(E)
©
ISO 2018
ISO 204:2018(E)
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 204:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and designations . 6
5 Principle . 8
6 Apparatus . 8
7 Test pieces .12
7.1 Shape and dimensions .12
7.1.1 Shape and dimension of smooth test pieces .12
7.1.2 Shape and dimension of notched test pieces .13
7.2 Preparation .13
7.3 Determination of the original cross-sectional area .14
7.4 Marking of the original gauge length, L .
o 14
7.5 Determination of the reference length, L .
r 14
8 Test procedure .15
8.1 Heating of the test piece.15
8.2 Application of the test force .15
8.3 Test interruptions .16
8.3.1 Planned interruptions of the test .16
8.3.2 Multiple test piece machine with several test pieces in line .16
8.3.3 Combined test.16
8.3.4 Accidental interruption of the test .16
8.4 Recording of temperature and elongation or extension .16
8.4.1 Temperature .16
8.4.2 Elongation and extension .16
8.4.3 Elongation-time diagram or extension-time diagram .17
9 Determination of results .17
10 Test validity .17
11 Accuracy of the results .17
11.1 Expression of the results .17
11.2 Final uncertainty .18
12 Test report .18
Annex A (informative) Information concerning drift of thermocouples .23
Annex B (informative) Information concerning methods of calibration of thermocouples .26
Annex C (normative) Creep testing using test pieces with V or blunt circumferential notches .27
Annex D (informative) Method of estimating the uncertainty of the measurement in
accordance with the Guide to the expression of uncertainty in measurement (GUM) .31
Annex E (informative) Representation of results and extrapolation.38
Annex F (informative) Computer compatible representation of standards .48
Bibliography .49
ISO 204:2018(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 Intro
...