oSIST prEN ISO 9556:2024

Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace (ISO/DIS 9556:2024)

The method is applicable to carbon contents between 0,003% (m/m) and 4,5 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. The annexes give additional information on the international co-operative tests, a graphical representation of precision data and features of induction furnaces and carbon analysers.

Stahl und Eisen - Bestimmung des Gesamtkohlenstoffgehalts - Verfahren mit Infrarotabsorption nach Verbrennung im Induktionsofen (ISO/DIS 9556:2024)

Aciers et fontes - Détermination du carbone total - Méthode par absorption dans l'infrarouge après combustion dans un four à induction (ISO/DIS 9556:2024)

La présente Norme internationale prescrit une méthode de dosage du carbone total dans les aciers et les fontes par absorption dans l'infrarouge après combustion dans un four à induction. La méthode est applicable aux teneurs en carbone comprises entre 0,003 % (m/m) et 4,5 % (m/m).

Jeklo in železo - Določevanje celotnega ogljika - Infrardeča absorpcijska metoda po zgorevanju v indukcijski peči (ISO/DIS 9556:2024)

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Dec-2024
• ICS: 77.040.30 - Chemical analysis of metals
• ICS: 77.080.01 - Ferrous metals in general
• Technical Committee: IFEK - Ferrous metals
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 05-Nov-2024
• Due Date: 25-Mar-2025
• Ref Project: prEN ISO 9556 - Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace (ISO/DIS 9556:2024)

Relations

• Revises: SIST EN ISO 9556:2002 - Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace (ISO 9556:1989)
• Effective Date: 25-Oct-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2024
Jeklo in železo - Določevanje celotnega ogljika - Infrardeča absorpcijska metoda
po zgorevanju v indukcijski peči (ISO/DIS 9556:2024)
Steel and iron - Determination of total carbon content - Infrared absorption method after
combustion in an induction furnace (ISO/DIS 9556:2024)
Stahl und Eisen - Bestimmung des Gesamtkohlenstoffgehalts - Verfahren mit
Infrarotabsorption nach Verbrennung im Induktionsofen (ISO/DIS 9556:2024)
Aciers et fontes - Détermination du carbone total - Méthode par absorption dans
l'infrarouge après combustion dans un four à induction (ISO/DIS 9556:2024)
Ta slovenski standard je istoveten z: prEN ISO 9556
ICS:
77.040.30 Kemijska analiza kovin Chemical analysis of metals
77.080.01 Železne kovine na splošno Ferrous metals in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 9556
ISO/TC 17/SC 1
Steel and iron — Determination
Secretariat: JISC
of total carbon content —
Voting begins on:
Infrared absorption method after
2024-10-16
combustion in an induction furnace
Voting terminates on:
2025-01-08
Aciers et fontes — Dosage du carbone total — Méthode par
absorption dans l'infrarouge après combustion dans un four à
induction
ICS: 77.080.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 9556:2024(en)
DRAFT
ISO/DIS 9556:2024(en)
International
Standard
ISO/DIS 9556
ISO/TC 17/SC 1
Steel and iron — Determination
Secretariat: JISC
of total carbon content —
Voting begins on:
Infrared absorption method after
combustion in an induction furnace
Voting terminates on:
Aciers et fontes — Dosage du carbone total — Méthode par
absorption dans l'infrarouge après combustion dans un four à
induction
ICS: 77.080.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 9556:2024(en)
ii
ISO/DIS 9556:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Sampling and sample preparation . 3
8 Procedure . 3
8.1 General operating instructions .3
8.2 Test portion .3
8.3 Blank test .4
8.4 Determination .4
8.5 Establishment of the calibration graph .4
9 Expression of results . 7
9.1 Method of calculation .7
9.2 Precision . . .7
10 Test report . 8
Annex A (Informative) Additional information on the international precision tests . 9
Annex B (Informative) Graphical representation of precison data .11
Annex C (Informative) Features of commercial high-frequency induction furnaces and infrared
carbon analysers . . .12
Bibliography . 14

iii
ISO/DIS 9556:2024(en)
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. 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
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Any trade name used in this document is information given for the convenience of users and does not
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For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT)
see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC17.
This document was prepared by Technical Committee [or Project Committee] ISO/TC 17, Steel, Subcommittee
SC 1, Methods of determination of chemical composition.
This second edition cancels and replaces the first edition (ISO 9556:1989), which has been technically
revised. The main changes compared to the previous edition are as follows:
— Normative references revised;
— Editorially updated;
— Precision data recalculated
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
DRAFT International Standard ISO/DIS 9556:2024(en)
Steel and iron — Determination of total carbon content
— Infrared absorption method after combustion in an
induction furnace
1 Scope
This document specifies an infrared absorption method after combustion in an induction furnace for the
determination of the total carbon content in steel and iron.
The method is applicable to carbon contents between 0,003 % (mass fraction) and 4,5 % (mass fraction).
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 648, Laboratory glassware — Single-volume pipettes
ISO 1042, Laboratory glassware — One-mark volumetric flasks
ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical composition
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principle
Combustion of a test portion in presence of an accelerator at a high temperature in a high-frequency
induction furnace in a current of pure oxygen. Transformation of carbon into carbon dioxide and/or carbon
monoxide.
Measurement by infrared absorption of the carbon dioxide and/or carbon monoxide carried by a current
of oxygen.
5 Reagents
During the analysis, unless otherwise stated, use only reagents of recognized analytical grade and only
distilled water or water of equivalent purity.
5.1 Water, free from carbon dioxide.
Boil water for 30 min, cool to room temperature and bubble with oxygen (5.2) for 15 min. Prepare just before use.

ISO/DIS 9556:2024(en)
5.2 Oxygen, 99,5 % (volume fraction) minimum.
An oxidation catalyst [copper(II) oxide or platinum] tube heated to a temperature above 450 °C shall be used
prior to a purifying unit (see annex C), when the presence of organic contaminants is suspected in the oxygen.
5.3 Pure iron, of known low carbon content less than 0,001 0 % (mass fraction).
5.4 Solvent, appropriate for washing greasy or dirty test samples, for example, acetone.
5.5 Magnesium perchlorate [Mg(ClO ) ], particle size : from 0,7 mm to 1,2 mm.
4 2
5.6 Barium carbonate
Dry barium carbonate (minimum purity: 99,5 %) at 105 °C to 110 °C for 3 h and cool in a desiccator before use.
5.7 Sodium carbonate
Dry anhydrous sodium carbonate (minimum purity: 99,9 %) at 285 °C for 2
...