ISO-6957-1988.pdf
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1、IS0 6957 INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXQJYHAPOAHAR OPTAHMSAMR l-l0 CTAHflAPTM3Aklkl Copper alloys - Ammonia test for stress corrosion resistance Alliages de cuivre - Essai i) l ammoniaque pour la rbsistance c) la
2、 corrosion sous contrainte First edition 1988-10-01 Reference number IS0 6957 : 1988 (E) IS0 6957 : 1966 (El Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is
3、normally carried out through IS0 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, govern- mental and non-governmental, in liaison with ISO, also take par
4、t in the work. IS0 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 approval before their acceptance as Internati
5、onal Standards by the IS0 Council. They are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting. International Standard IS0 6957 was prepared by Technical Committee ISO/TC 26, Copper end copper alloys. Annexes A and B of this International Standard
6、 are for information only. 0 international Organization for Standardization, 1999 0 Printed in Switzerland INTERNATIONAL STANDARD ISO 6957 : 1988 (E) Copper alloys - Ammonia test for stress corrosion resistance 1 Scope This international Standard specifies a test, using an am- moniacal atmosphere, f
7、or the detection of applied or residual stresses in copper alloy products which can cause failure of the material in service or storage through stress corrosion cracking. The method can also be used for testing assemblies and partial assemblies (of limited size). This method is relatively simple to
8、carry out and its severity can be regulated by changing the pH value of the solution produc- ing the ammoniacal atmosphere. The appropriate pH-value for the test shall be specified in the product specification or agreed upon with respect to the alloy and its application. In annex A, recommendations
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- ISO 6957 1988
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