SIST EN ISO 15349-2:2003

SLOVENSKI STANDARD
SIST EN ISO 15349-2:2003
01-november-2003
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Unalloyed steel - Determination of low carbon content - Part 2: Infrared absorption
method after combustion in an induction furnace (with preheating) (ISO 15349-2:1999)
Unlegierter Stahl - Bestimmung niedriger Kohlenstoffgehalte - Teil 2: Verfahren mit
Infrarotabsorption nach Verbrennung im Induktionsofen (mit Vorwärmung) (ISO 15349-
2:1999)
Acier non allié - Détermination des faibles teneurs en carbone - Partie 2: Méthode par
absorption dans l'infrarouge aprés combustion dans un four a induction (avec
préchauffage) (ISO 15349-2:1999)
Ta slovenski standard je istoveten z: EN ISO 15349-2:2003
ICS:
77.040.30 Kemijska analiza kovin Chemical analysis of metals
77.140.45 Nelegirana jekla Non-alloyed steels
SIST EN ISO 15349-2:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 15349-2:2003

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SIST EN ISO 15349-2:2003
EUROPEAN STANDARD
EN ISO 15349-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2003
ICS 77.040.30
English version
Unalloyed steel - Determination of low carbon content - Part 2:
Infrared absorption method after combustion in an induction
furnace (with preheating) (ISO 15349-2:1999)
Acier non allié - Détermination des faibles teneurs en Unlegierter Stahl - Bestimmung niedriger
carbone - Partie 2: Méthode par absorption dans Kohlenstoffgehalte - Teil 2: Verfahren mit Infrarotabsorption
l'infrarouge aprés combustion dans un four à induction nach Verbrennung im Induktionsofen (mit Vorwärmung)
(avec préchauffage) (ISO 15349-2:1999) (ISO 15349-2:1999)
This European Standard was approved by CEN on 16 May 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15349-2:2003 E
worldwide for CEN national Members.

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SIST EN ISO 15349-2:2003
EN ISO 15349-2:2003 (E)
Foreword
The text of ISO 15349-2:1999 has been prepared by Technical Committee ISO/TC 17 "Steel” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO
15349-2:2003 by Technical Committee ECISS/TC 20 "Methods of chemical analysis", 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 December 2003, and conflicting national
standards shall be withdrawn at the latest by December 2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and
the United Kingdom.
Endorsement notice
The text of ISO 15349-2:1999 has been approved by CEN as EN ISO 15349-2:2003 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
2

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SIST EN ISO 15349-2:2003
EN ISO 15349-2:2003 (E)
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 1042 1998 Laboratory glassware - One-mark EN ISO 1042 1999
volumetric flasks
ISO 3696 1987 Water for analytical laboratory use - EN ISO 3696 1995
Specification and test methods
ISO 14284 1996 Steel and iron - Sampling and EN ISO 14284 2002
preparation of samples for the
determination of chemical
composition
3

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SIST EN ISO 15349-2:2003

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SIST EN ISO 15349-2:2003
INTERNATIONAL ISO
STANDARD 15349-2
First edition
1999-12-01
Unalloyed steel — Determination of low
carbon content —
Part 2:
Infrared absorption method after
combustion in an induction furnace
(with preheating)
Acier non allié — 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 15349-2:1999(E)
©
ISO 1999

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SIST EN ISO 15349-2:2003
ISO 15349-2:1999(E)
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ii © ISO 1999 – All rights reserved

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SIST EN ISO 15349-2:2003
ISO 15349-2:1999(E)
Contents Page
1 Scope .1
2 Normative references .1
3 Principle.1
4 Reagents.2
5 Apparatus .3
6 Sampling and preparation of the test samples.4
7 Procedure .4
8 Expression of results .7
Annex A (informative) Features of commercial high-frequency induction furnaces and infrared carbon
analysers .9
Annex B (informative) Additional information on international cooperative tests.11
Annex C (informative) Graphical representation of precision data .14
© ISO 1999 – All rights reserved iii

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SIST EN ISO 15349-2:2003
ISO 15349-2:1999(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 15349 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 1,
Methods of determination of chemical composition.
ISO 15349 consists of the following parts, under the general title Unalloyed steel — Determination of low carbon
content:
� Part 1: Infrared absorption method after combustion in an electric resistance furnace (by peak separation)
[Technical Report]
� Part 2: Infrared absorption method after combustion in an induction furnace (with preheating)
� Part 3: Infrared absorption method after combustion in an electric resistance furnace (with preheating)
[Technical Report]
Annexes A, B and C of this part of ISO 15349 are for information only.
iv © ISO 1999 – All rights reserved

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SIST EN ISO 15349-2:2003
INTERNATIONAL STANDARD ISO 15349-2:1999(E)
Unalloyed steel — Determination of low carbon content —
Part 2:
Infrared absorption method after combustion in an induction
furnace (with preheating)
1 Scope
This part of ISO 15349 specifies an infrared absorption method after combustion in an induction furnace for the
determination of the low carbon content in unalloyed steel.
The method is applicable to carbon contents between 0,000 3 % (m/m) and 0,010 % (m/m).
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 15349. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 15349 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 648:1977, Laboratory glassware — One-mark pipettes.
ISO 1042:1998, Laboratory glassware — One-mark volumetric flasks.
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods.
ISO 5725-1:1994, Accuracy (trueness and precision) of measurement methods and results — Part 1: General
principles and definitions.
ISO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method
for the determination of repeatability and reproducibility of a standard measurement method.
ISO 5725-3:1994, Accuracy (trueness and precision) of measurement methods and results — Part 3: Intermediate
measures of the precision of a standard measurement method.
ISO 14284:1996, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition.
3Principle
Preheating of a test portion at low temperature and combustion of a test portion with accelerator at a high
temperature in an induction furnace in a current of pure oxygen. Transformation of carbon into carbon dioxide
and/or carbon monoxide.
© ISO 1999 – All rights reserved 1

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SIST EN ISO 15349-2:2003
ISO 15349-2:1999(E)
Measurement of infrared absorption of the carbon dioxide or carbon dioxide/carbon monoxide evolved from steel
and carried by a current of pure oxygen.
Calibration graph is established using sucrose or calcium carbonate.
4 Reagents
During the analysis, unless otherwise stated, use only reagents of recognized analytical grade and only grade 3
water as specified in ISO 3696.
4.1 Water, free from carbon dioxide.
Boil water for 30 min, bubble with oxygen (4.2) while cooling to room temperature for 15 min. Prepare just before
use.
4.2 Oxygen, 99,95 % (m/m) 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, when the presence of organic contaminants in the oxygen is suspected.
4.3 Pure iron, of known very low carbon content less than 0,000 3 % (m/m).
4.4 Suitable solvent, appropriate for washing greasy or dirty test samples, e.g., acetone.
4.5 Accelerator, copper plate (see NOTE 1) or pellet type tin and granular tungsten mixture (see NOTE 2) of
known very low carbon content less than 0,000 3% (m/m).
NOTE 1 Copper plate (about 0,1 g/plate) should be used after the following treatment. Heat the copper plate at 450 �Cto
600 �C for 10 min in a current of oxygen or air and cool in a desiccator without grease. This treatment shall be carried out just
before use.
NOTE 2 Pellet type tin (about 0,2 g/pellet) and granular tungsten (only LECOCEL I is applicable) should be used after the
following treatment. Heat the tungsten at 450 �C in air for 10 min and cool in a desiccator without grease. Clean the tin for more
than 5 min by use of hydrochloric acid in an ultrasonic cleaner, rinse in water and dry in air. These treatments shall be carried
out just before use.
4.6 Standard substances
4.6.1 Sucrose, standard solution.
Weigh, to the nearest 0,1 mg, the seven masses of sucrose (C H O ) (analytical standard grade) previously
12 22 11
dried at 100 �Cto 105 �C for 2,5 h and cooled in a desiccator, indicated in Table 1 and transfer to seven 100 ml
beakers.
Add 30 ml of water (4.1) to dissolve, transfer to seven 100 ml one-mark volumetric flasks quantitatively, dilute to the
mark with water (4.1) and mix.
2 © ISO 1999 – All rights reserved

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SIST EN ISO 15349-2:2003
ISO 15349-2:1999(E)
Table 1 — Standard solution series of sucrose
Corresponding mass of Carbon content in 1 g of
Standard solution Mass of sucrose
added carbon the test portion
reference number
gμg %(m/m)
a
10 00
2 0,010 0 4,21 0,000 42
3 0,025 0 10,53 0,001 05
4 0,060 0 25,26 0,002 53
5 0,120 0 50,53 0,005 05
6 0,180 0 75,79 0,007 58
7 0,240 0 101,1 0,010 11
a
Zero member.
4.6.2 Calcium carbonate
Dry calcium carbonate [minimum assay: 99,9 % (m/m)] at 180 �C for 1 h and cool in a desiccator before use.
4.7 Magnesium perchlorate [Mg(ClO ) ], particle size: from 0,7 mm to 1,2 mm.
4 2
4.8 Inert ceramic (attapulgus clay) impregnated with sodium hydroxide, particle size: from 0,7 mm to
1,2 mm.
5 Apparatus
During the analysis, unless otherwise stated, use only ordinary laboratory apparatus.
All laboratory glassware shall be class A, in accordance with ISO 648 or ISO 1042 as appropriate.
The apparatus required for combustion in a high-frequency induction furnace and the subsequent infrared
absorption measurement of the evolved carbon dioxide and/or carbon monoxide may be obtained commercially
from a number of manufacturers.
Features of commercial instruments are given in annex A.
5.1 Ceramic crucible, capable of withstanding combustion in an induction furnace.
Just before use, ignite crucibles in an electric furnace in a current of oxygen or air for not less than 2 h at more than
1 200 �C and keep in a desiccator.
5.2 Tin capsule, about 6 mm in diameter, 18 mm in height, 0,3 g in mass and approximately 0,4 ml in volume.
Tin capsules should be used after the following treatment.
Rinse the capsule in hydrochloric acid (� about 1,19 g/ml, diluted 1 � 1) for 5 min while shaking frequently; wash it
thoroughly with water and dry. Store it in a clean glass bottle.
5.3 Glass-fiber filter, 21 mm in diameter (for example, Whatman glass-fiber filter GF/F)
Glass-fiber filters should be used after the following treatment.
Heat the glass-fiber filter at 500 �C to 550 �C for 30 min and more in air and cool in a desiccator without grease.
Store it in a clean glass bottle.
© ISO 1999 – All rights reserved 3

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SIST EN ISO 15349-2:2003
ISO 15349-2:1999(E)
5.4 Micropipette, 100 μl, limit of error shall be less than 1 μl.
5.5 Microbalance, weighing to the nearest 0,1 μg.
5.6 Muffle or wire-wound furnace, regulated at 400 �Cto500 �C.
6 Sampling and preparation of the test samples
Sampling and
...