BS ISO 16374-2016 Evaluation method for cleanliness of magnesium and magnesium alloy ingots《镁和镁合金锭清洁度的评估方法》.pdf
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1、BS ISO 16374:2016Evaluation method forcleanliness of magnesium andmagnesium alloy ingotsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 16374:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16374:2016.The UK particip
2、ation in its preparation was entrusted to TechnicalCommittee NFE/35, Light metals and their alloys.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are respon
3、sible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 78092 9ICS 77.120.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards P
4、olicy and Strategy Committee on 30 September 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 16374:2016 ISO 2016Evaluation method for cleanliness of magnesium and magnesium alloy ingotsMthode dvaluation de la propret des lingots en magnsium et en alliages de mag
5、nsiumINTERNATIONAL STANDARDISO16374First edition2016-09-01Reference numberISO 16374:2016(E)BS ISO 16374:2016ISO 16374:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may
6、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 requested from either ISO at the address below or ISOs member body in the country of the r
7、equester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 16374:2016ISO 16374:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Naked eye inspection . 15 Chemic
8、al composition analysis . 16 Brightness evaluation . 26.1 Principle of brightness evaluation . 26.2 Specimen preparation 26.3 Shape of jig 36.4 Brightness evaluation of the fracture surface 46.5 Others 57 Test report . 5Bibliography 6 ISO 2016 All rights reserved iiiContents PageBS ISO 16374:2016ISO
9、 16374:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject
10、for 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 (IEC) o
11、n all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted
12、. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).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 an
13、y 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 declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of us
14、ers and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
15、 URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 79, Light metals and their alloys, Subcommittee SC 5, Magnesium and alloys of cast or wrought magnesium.iv ISO 2016 All rights reservedBS ISO 16374:2016INTERNATIONAL STANDARD ISO 16374:2016(E)Evaluation method
16、for cleanliness of magnesium and magnesium alloy ingots1 ScopeThis document describes a method to evaluate the cleanliness and the quality of magnesium and magnesium alloys ingots.The method includes naked eye inspection, the composition analysis and a brightness evaluation procedure based on an ISO
17、 standard.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (
18、including any amendments) applies.ISO 2470-1, Paper, board and pulps Measurement of diffuse blue reflectance factor Part 1: Indoor daylight conditions (ISO brightness)ISO 3116, Magnesium and magnesium alloys Wrought magnesium alloysISO 8287, Magnesium and magnesium alloys Unalloyed magnesium Chemica
19、l compositionISO 16220, Magnesium and magnesium alloys Magnesium alloy ingots and castings3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at ht
20、tp:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 Naked eye inspectionIdentify any presence of significant contraction or impurities on the surface of magnesium ingots. The decision on the quality of ingots by naked eye inspection should be agreed between th
21、e supplier and the purchaser.5 Chemical composition analysisAnalyse the content of alloying elements of ingots. The chemical composition methods can be selected by agreement between the supplier and the purchaser and shall be mentioned in the testing report. The chemical composition of magnesium and
22、 magnesium alloys is specified in ISO 8287, ISO 16220 and ISO 3116. The range of the composition of unspecified alloys or alloying elements can be determined by an agreement between the supplier and the purchaser. ISO 2016 All rights reserved 1BS ISO 16374:2016ISO 16374:2016(E)6 Brightness evaluatio
23、n6.1 Principle of brightness evaluationThe principle of the brightness evaluation is based on the specification given in ISO 2470-1. Diffused light beams from a standard testing machine are shed on a specimen. Beams reflected from the specimen surface pass through a specified glass filter and are su
24、bsequently measured by an optical cell or arranged diodes that respond to different effective wavelengths. The brightness can be evaluated directly from the output of the optical cell or obtained by assessment of the output from the diodes using an appropriate weight function.6.2 Specimen preparatio
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