ISO INTERNATIONAL STANDARD 13902 First edition 1997-08-15 Steel and iron Determination of high sulfur content - Infrared absorption method after combustion in an induction furnace Aciersetfontes- Dosage du soufre en fortes teneurs -- Methode par absorption dans I'infrarouge apres combustion dans un four a induction ISO Reference number ISO 13902:1997(E) No reproduction or networking permitted without license from IHS Not for Resale ISO13902:1997(E) Foreword committees. Each member body interested in a subject for which a technical committee has been established has liaison with Iso, also take part in the work.IsO collaborates closely with the International Electrotechnical Commission (IEC)onallmattersofelectrotechnicalstandardization. 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. International Standard ISO 13902 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 1 Methodsofdeterminationofchemicalcomposition. AnnexesAtoCofthisInternationalStandardareforinformationonly @ISO1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International OrganizationforStandardization Case postale 56.CH-1211Geneve20.Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; 0=isocs; S=central Printed in Switzerland Copyright Internatior nal Organization for Standardizatior No reproduction or networking permitted without I nse from IHS Not for Resale ISO 13902:1997(E) INTERNATIONALSTANDARD ISO Steel and iron Determination of high sulfur content -- Infrared absorption method after combustion in an induction furnace Scope This International Standard specifies a method for the determination of the sulfur content in steel and iron using an infrared absorption method after combustion in an induction furnace. The method is applicable to a sulfur content of between 0,1o % (m/m) and 0,35 % (m/m) 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IsO 565:1990, Test sieves-Metal wire cloth, perforated metal plate and electroformed sheet—Nominal sizes of openings. IsO 5725-1:1994, Accuracy (trueness and precision) of measurement methods and results -- Part 1: General principles and definitions. 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. 3 Principle Combustion of a test portion with accelerator at a high temperature in a high-frequency induction furnace in a current of pure oxygen. Transformationofsulfurinto sulfurdioxide. Measurement by infrared absorption of the sulfur dioxide carried by a current of oxygen. 4 Reagents and materials During the analysis, unless otherwise stated, use only reagents of recognized analytical grade. Noreproductionornetworkingpermittedwithout lice Not for Resale