ISO INTERNATIONAL STANDARD 10387 First edition 1994-09-01 Metal chrome - Specification and conditions of delivery Chrome métallique -- Specifications et conditions de livraison ISO Reference number ISO 10387:1994(E) ISO 10387:1994(E) Foreword federationofnationalstandardsbodies(lsOmemberbodies).Theworkof 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 (lEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.Publication as an International a vote. International Standard ISO 10387 was prepared by Technical Committee ISO/TC132,Ferroalloys. @ISO1994 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 Organizationfor Standardization Case postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii ISO 10387:1994(E) INTERNATIONALSTANDARDISO Metal chrome -- Specification and conditions of delivery 1 Scope ISO 8954-1:1990, Ferroalloys Vocabulary Part 1: Materials. This International Standard specifies requirements and conditions of delivery for metal chrome usually supplied for alloying special steels and alloys. 3 Definitions For the purposes of this International Standard, the 2 Normative references following definition and those in ISO 8954-1 apply. The following standards contain provisions which, through reference in this text, constitute provisions of 3.1 metal chrome: An alloying material with a this International Standard. At the time of publication, minimum chrome content of 98 % by mass obtained the editions indicated were valid. All standards are byreductionoranelectrolyticmethod. subject to revision, and parties to agreements based on this International Standard areencouraged to investigate the possibility of applying the most recent 4 Information for ordering editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. Orders for metal chrome shall include the following information: ISO 565:1990. Test sieves Metal wire cloth, a) quantity; perforated metal plate and electroformed sheet Nominal sizes of openings. b) constitution of consignment; ISO 3713:1987, Ferroalloys Sampling and c) chemical composition, in accordance with the preparation of samples - Generalrules. designations given in table 1; Table1— Chemical composition Chemical composition, % (m/m) Designation1) Cr Si Al Fe c S Cu As Bi Sb Zn Pb Sn N 02 H2 min. max. max. max. max. max. max. max. max. max. max. max. max. max.max. max. max. RECr99,6 99,6|0.04 0,01 0,35 0,05 0,010|0,005|0,005 0,001 0,02 0,050,001 ECr99,2 99,2 0,01 0,0050,20 0,02 [0.030|0.005|0.005|0.005 0,003 0.0050.0050.0030.001 0,03 0,55 0.10 RACr99 99,0 0,1 0,3 0,3 0.01 0.01 0.01 0,005|0,005 0,000 5 0,002|0.005|0,005|0.004|0,01 ACr98,5 98,5 0,3 0,5 0,5 0,03 0,02 0,02 0,01 0,01 0,001 0,0080,01 0,001 0.0060.05 ACr98 98,0 0,5 0.7 0.8 0,05 0,04 0,03 0,04 NOTE -- Metal chrome of ECr grade may be supplied in degassed form with the gas content not more than: 0,02 N, 0,05 O2 and 0,001 H2 1)E: electrolytic A: aluminothermic R: refined 1