EN ISO 15349-2:2021

SLOVENSKI STANDARD
01-oktober-2021
Nadomešča:
SIST EN ISO 15349-2:2003
Nelegirana jekla - Določevanje ogljika v majhnih količinah - 2. del: Metoda z
infrardečo absorpcijo po zgorevanju v indukcijski peči (s predgrevanjem) (ISO
15349-2:2021)
Unalloyed steel - Determination of low carbon content - Part 2: Infrared absorption
method after combustion in an induction furnace (with preheating) (ISO 15349-2:2021)
Unlegierter Stahl - Bestimmung niedriger Kohlenstoffgehalte - Teil 2: Verfahren mit
Infrarotabsorption nach Verbrennung im Induktionsofen (mit Vorwärmung) (ISO 15349-
2:2021)
Acier non alliés - Détermination des faibles teneurs en carbone - Partie 2: Méthode par
absorption dans l'infrarouge après combustion dans un four à induction (avec
préchauffage) (ISO 15349-2:2021)
Ta slovenski standard je istoveten z: EN ISO 15349-2:2021
ICS:
77.040.30 Kemijska analiza kovin Chemical analysis of metals
77.140.45 Nelegirana jekla Non-alloyed steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 15349-2
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2021
EUROPÄISCHE NORM
ICS 77.080.20 Supersedes EN ISO 15349-2:2003
English Version
Unalloyed steel - Determination of low carbon content -
Part 2: Infrared absorption method after combustion in an
induction furnace (with preheating) (ISO 15349-2:2021)
Acier non alliés - Détermination des faibles teneurs en Unlegierter Stahl - Bestimmung niedriger
carbone - Partie 2: Méthode par absorption dans Kohlenstoffgehalte - Teil 2: Verfahren mit
l'infrarouge après combustion dans un four à induction Infrarotabsorption nach Verbrennung im
(avec préchauffage) (ISO 15349-2:2021) Induktionsofen (mit Vorwärmung) (ISO 15349-
2:2021)
This European Standard was approved by CEN on 11 July 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15349-2:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 15349-2:2021) has been prepared by Technical Committee ISO/TC 17 "Steel" in
collaboration with Technical Committee CEN/TC 459/SC 2 “Methods of chemical analysis for iron and
steel ” the secretariat of which is held by SIS.
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 January 2022, and conflicting national standards shall
be withdrawn at the latest by January 2022.
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 15349-2:2003.
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 websites.
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 15349-2:2021 has been approved by CEN as EN ISO 15349-2:2021 without any
modification.
INTERNATIONAL ISO
STANDARD 15349-2
Second edition
2021-07
Unalloyed steel — Determination of
low carbon content —
Part 2:
Infrared absorption method after
combustion in an induction furnace
(with preheating)
Aciers non alliés — Détermination des faibles teneurs en carbone —
Partie 2: Méthode par absorption dans l'infrarouge après combustion
dans un four à induction (avec préchauffage)
Reference number
ISO 15349-2:2021(E)
©
ISO 2021
ISO 15349-2:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 15349-2:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 3
7 Sampling and preparation of the test samples . 4
8 Procedure. 4
8.1 General . 4
8.2 Test portion . 5
8.3 Blank test . 5
8.4 Determination . 5
8.4.1 Pre-treatment of the test portion . 5
8.4.2 Combustion of the test portion . 6
8.5 Establishment of the calibration curve . 6
8.5.1 Calibration with sucrose standard solutions . 6
8.5.2 Calibration with calcium carbonate . 7
9 Expression of results . 7
9.1 Method of calculation . 7
9.2 Precision . 8
10 Test report . 8
Annex A (informative) Features of commercial induction furnaces and infrared carbon analysers 9
Annex B (informative) Additional information on the international inter-laboratory test .11
Annex C (informative) Graphical representation of precision data .12
Bibliography .13
ISO 15349-2:2021(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 17, Steel, Subcommittee SC 1, Methods
of determination of chemical composition, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 459/SC 2, Methods of chemical analysis for iron
and steel, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This second edition cancels and replaces the first edition (ISO 15349-2:1999), which has been
technically revised. The main changes compared to the previous edition are as follows:
— normative references have been revised;
— the precision data has been updated;
— the former Table B.3 has been deleted;
— the text has been improved editorially.
A list of all parts in the ISO 15349 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the use
...