1、BSI Standards PublicationBS ISO 7802:2013Metallic materials Wire Wrapping testBS ISO 7802:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 7802:2013. The UK participation in its preparation was entrusted to TechnicalCommittee ISE/101/2, Ductility testing.A
2、list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standar
3、ds Limited 2013ISBN 978 0 580 82937 6 ICS 77.040.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2013.Amendments issued since publicationDate T e
4、x t a f f e c t e dBS ISO 7802:2013 ISO 2013Metallic materials Wire Wrapping testMatriaux mtalliques Fils Essai denroulementINTERNATIONAL STANDARDISO7802Second edition2013-11-01Reference numberISO 7802:2013(E)BS ISO 7802:2013ISO 7802:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT
5、 ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be
6、requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 7802:2013ISO 7802:2013(E) ISO 2013 A
7、ll rights reserved iiiContents PageForeword iv1 Scope . 12 Principle 13 Test equipment. 14 Procedure. 15 Test report . 1BS ISO 7802:2013ISO 7802:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The wor
8、k 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-governme
9、ntal, 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.The procedures used to develop this document and those intended for its further maintenance are described in the
10、 ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility
11、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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent
12、 declarations received. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not constitute an endorsement.The committee responsible for this document is ISO/TC 164, Mechanical testing of metals, Subcommittee SC 2, Ductility testing.This
13、second edition cancels and replaces the first. edition (ISO 7802:1983), of which it constitutes a minor revision.iv ISO 2013 All rights reservedBS ISO 7802:2013INTERNATIONAL STANDARD ISO 7802:2013(E)Metallic materials Wire Wrapping test1 ScopeThis International Standard specifies a method for determ
14、ining the ability of metallic wire of diameter or thickness 0,1 mm to 10 mm inclusive, to undergo plastic deformation during wrapping.2 PrincipleThe wrapping test consists of winding a wire to a specified number of turns around a mandrel of the diameter specified in the relevant standard to form a c
15、losely wrapped helix.It may also include a specified sequence of winding and unwinding, or even rewinding.3 Test equipmentThe testing machine shall be constructed so the wire can be wound around the mandrel in a helix so that adjacent wraps of the coil are in contact. A piece of the wire to be teste
16、d may be used as the mandrel, provided it is of the specified mandrel diameter and of sufficient hardness.4 Procedure4.1 In general, the test is carried out at ambient temperature between 10 C and 35 C. Tests carried out under controlled conditions shall be made at a temperature of 23 C 5 C.4.2 With
17、out applying any torsion, wind the wire in a helix tightly around the mandrel at a constant rate not exceeding 1 wrap per second so that the adjacent wraps of the coil are in contact. If necessary, reduce the rate of wrapping to ensure that the heat generated does not affect the result of the test.4
18、.3 To ensure tight winding, a tensile stress not exceeding 5 % of the nominal tensile strength of the wire may be applied during winding.4.4 When unwinding, or unwinding and rewinding, are specified, the rate shall be sufficiently slow to prevent any rise of temperature likely to affect the result o
19、f the test. At the end of the unwinding, at least one turn shall not be unwound.4.5 The interpretation of the wrapping test is carried out according to the requirements of the relevant Standard. When these requirements are not specified, absence of cracks visible without the use of magnifying aids i
20、s considered as sufficient evidence that the test piece withstood the test. Wire with a thickness or diameter less than 0,5 mm shall be examined with approximately 10-times magnification.5 Test reportThe test report shall include the following information:a) a reference to this International Standar
21、d;b) identification of the test piece (type of material, type of coating, etc.);c) diameter or thickness of the test piece; ISO 2013 All rights reserved 1BS ISO 7802:2013ISO 7802:2013(E)d) diameter of the mandrel;e) test conditions (number of turns, or the wound length);f) test result.2 ISO 2013 All
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