ISO INTERNATIONAL STANDARD 18594 First edition 2007-03-01 Resistance spot-, projection- and seam- welding Method for determining the transition resistance on aluminium and steel material Soudage par resistance par points, par bossages et a la molette. Methode pour la determination de la résistance de transition sur I'aluminium et sur I'acier Reference number ISO 18594:2007(E) @ISO2007 py IHS under ted without license from IHS Not for Resale ISO18594:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Detais of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ?ISO2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2007 - All rights reserved Not for Resale ISO 18594:2007(E) Contents Page Foreword 1 Scope 2 Terms and definitions 3 Basic principles 4 Measurement.... 4.1 Measuring set-up 4.2 Measurement procedure 5 Test equipment , 6 Formulae and abbreviations for calculating the transition resistance.. 7 Test report Annex A (informative) Test report. Bibliography Copyright internatina organizaio far standardizalion ghts reserved ii IHS unde nse from IHS Not for Resale ISO 18594:2007(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeer 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 InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. 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 document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 18594 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 6, Resistance welding. Requests for official interpretations of any aspect of this International Standard should be directed to the found at www.iso.org. @ ISO 2007 - All rights reserved ional Organization for Standardizatior INTERNATIONAL STANDARD ISO18594:2007(E) Resistance spot-, projection- and seam-welding - Method for determining the transition resistance on aluminium and steel material Scope resistance of a single sheet or two overlapping sheets of aluminium or steel, with or without surface treatment, and with or without surface coating. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 contact resistance steady current EXAMPLE Theconta