Vitreous and porcelain enamels - Preparation of samples and determination of thermal expansion coefficient (ISO 20274:2017)

This standard specifies the procedures for the preparation of enamel samples for measurement of the thermal dilatation and calculation of the thermal expansion coefficient.

Emails und Emaillierungen - Herstellung von Proben und Bestimmung des thermischen Ausdehnungskoeffizienten (ISO 20274:2017)

Emaux vitrifiés - Préparation d'échantillons émaillés et détermination du coefficient de la dilatation thermique (ISO 20274:2017)

ISO 20274:2017 spécifie des modes opératoires de préparation d'échantillons d'émail en vue de mesurer la variation de longueur en fonction de la température et de calculer le coefficient de dilatation thermique.

Steklasti in keramični emajli - Priprava vzorcev in določanje koeficienta toplotne razteznosti (ISO 20274:2017)

Ta standard določa postopke za pripravo vzorcev emajlov za merjenje toplotne dilatacije in izračun koeficienta toplotne razteznosti.

General Information

Status
Published
Public Enquiry End Date
14-Oct-2016
Publication Date
15-Oct-2017
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-Oct-2017
Due Date
10-Dec-2017
Completion Date
16-Oct-2017

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SLOVENSKI STANDARD
SIST EN ISO 20274:2017
01-november-2017

6WHNODVWLLQNHUDPLþQLHPDMOL3ULSUDYDY]RUFHYLQGRORþDQMHNRHILFLHQWDWRSORWQH

UD]WH]QRVWL ,62

Vitreous and porcelain enamels - Preparation of samples and determination of thermal

expansion coefficient (ISO 20274:2017)

Emails und Emaillierungen - Herstellung von Proben und Bestimmung des thermischen

Ausdehnungskoeffizienten (ISO 20274:2017)

Emaux vitrifiés - Préparation d'échantillons émaillés et détermination du coefficient de la

dilatation thermique (ISO 20274:2017)
Ta slovenski standard je istoveten z: EN ISO 20274:2017
ICS:
25.220.50 Emajlne prevleke Enamels
SIST EN ISO 20274:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 20274:2017
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SIST EN ISO 20274:2017
EN ISO 20274
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2017
EUROPÄISCHE NORM
ICS 25.220.50
English Version
Vitreous and porcelain enamels - Preparation of samples
and determination of thermal expansion coefficient (ISO
20274:2017)

Emaux vitrifiés - Préparation d'échantillons d'émail et Emails und Emaillierungen - Herstellung von Proben

détermination du coefficient de dilatation thermique und Bestimmung des thermischen

(ISO 20274:2017) Ausdehnungskoeffizienten (ISO 20274:2017)
This European Standard was approved by CEN on 22 June 2017.

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: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20274:2017 E

worldwide for CEN national Members.
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SIST EN ISO 20274:2017
EN ISO 20274:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 20274:2017
EN ISO 20274:2017 (E)
European foreword

This document (EN ISO 20274:2017) has been prepared by Technical Committee ISO/TC 107 “Metallic

and other inorganic coatings” in collaboration with Technical Committee CEN/TC 262 “Metallic and

other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”

the secretariat of which is held by BSI.

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 February 2018, and conflicting national standards

shall be withdrawn at the latest by February 2018.

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.

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 20274:2017 has been approved by CEN as EN ISO 20274:2017 without any modification.

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SIST EN ISO 20274:2017
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SIST EN ISO 20274:2017
INTERNATIONAL ISO
STANDARD 20274
First edition
2017-07
Vitreous and porcelain enamels —
Preparation of samples and
determination of thermal expansion
coefficient
Emaux vitrifiés — Préparation d’échantillons d’émail et
détermination du coefficient de dilatation thermique
Reference number
ISO 20274:2017(E)
ISO 2017
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SIST EN ISO 20274:2017
ISO 20274:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
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SIST EN ISO 20274:2017
ISO 20274:2017(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Apparatus ..................................................................................................................................................................................................................... 1

5 Requirements for the test specimen ................................................................................................................................................ 1

6 Preparation of the test specimens ..................................................................................................................................................... 2

6.1 General ........................................................................................................................................................................................................... 2

6.2 Production by casting........................................................................................................................................................................ 2

6.3 Production by drawing out of the melt .............................................................................................................................. 2

6.4 Production by sintering ................................................................................................................................................................... 3

7 Determination of the thermal expansion coefficient ..................................................................................................... 3

8 Calculation and indication of the results .................................................................................................................................... 4

9 Test report ................................................................................................................................................................................................................... 4

Annex A (informative) Metallic casting mould ........................................................................................................................................... 5

Annex B (informative) Drawing from the melt ......................................................................................................................................... 6

© ISO 2017 – All rights reserved iii
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SIST EN ISO 20274:2017
ISO 20274:2017(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

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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.

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URL: w w w . i s o .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings.

iv © ISO 2017 – All rights reserved
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SIST EN ISO 20274:2017
ISO 20274:2017(E)
Introduction

The thermal expansion coefficient of enamel and the relevant substrate is an important material

characteristic, as it provides information on the stress ratios in the composite material.

© ISO 2017 – All rights reserved v
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SIST EN ISO 20274:2017
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SIST EN ISO 20274:2017
INTERNATIONAL STANDARD ISO 20274:2017(E)
Vitreous and porcelain enamels — Preparation of samples
and determination of thermal expansion coefficient
1 Scope

This document specifies the procedures for the preparation of enamel samples for measurement of the

thermal length change and calculation of the thermal expansion coefficient.
2 Normative references
The following documents are referred to in the text in s
...

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