ISO INTERNATIONAL STANDARD 8493 Second edition 1998-11-01 Metallic materials Tube - Drift-expanding test Materiaux métalliques Tubes - Essai d'évasement X Reference number ISO 8493:1998(E) ISO 8493:1998(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas liaison with isO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) 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 Standard requires approval by at least 75 % of the member bodies casting a vote International Standard iSO 8493 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC2, Ductilitytesting This second edition cancels and replaces the first edition (sO 8493:1986), of which it constitutes a technical revision ISO1998 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. InternationalOrganizationforStandardizatior Case postale56·CH-1211Geneve 20·Switzerland Internet [email protected] Printed in Switzerland INTERNATIONAL STANDARD @ISO ISO8493:1998(E) Metallic materials Tube Drift-expanding test 1 Scope This International Standard specifies a method for determining the ability of metallic tubes of circular cross-section to undergo plastic deformation in drift expansion. This International Standard is intended for tubes having an outside diameter no greater than 150 mm (100 mm for which this International Standard is applicable may be more exactly specified in the relevant product standard. 2 Symbols, designations and units Table 1 Symbol Designation Unit aa Wall thickness of the tube mm D Original outside diameter of the tube mm Du Maximum outside diameter after testing mm L Length of the test piece before testing mm β Angle of the conical mandrel degree The symbol T is also used in steel tube standards. Du D Figure 1