4851903 0038812 5187-85 L 5187 International Standard (TSO INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOAHAR OPTAHW3AUWH IO CTAHAAPTW3AUWW+ORGANISATION INTE RNATIONALE DE NORMALISATION Welding and allied processes - Assemblies made with soft solders and brazing filler metals - Mechanical test methods Soudage et techniques connexes - Assemblages exécutes avec des produits d'apport de brasage tendre et de brasage fort - Methodes d'essai mecanique First edition - 1985-05-01 UDC 621.791.052 : 620.172 Ref. No. ISO 5187-1985 (E) O 5187-1985 Descriptors : welding, brazing- and soldering, brazed- and soldered joints, tests, mechanical tests, shear tests, tension tests, test equipment. yright International Organization for Standardization Price based on 11 pages Not for Resale 5187-85 EobTS ETGREO 2 Foreword 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 for which a technical committee has been established has the right to be represented on that committee. tnternational organizations, govern- mental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISO procedures requiring at international Standard ISO 5187 was prepared by Technical Committee ISO/TC 44, Welding and allied processes. International Organization for Standardization, 1985 Printed in Switzerland Copyright International Organization for Standardization ng permitted without license from IHS Not for Resale No reproduction or network 5187-85 INTERNATIONAL STANDARD HTAEO EObTSh ISO 5187-1985 (E) 4 Welding and allied processes - Assemblies made with soft solders and brazing filler metals - Mechanical test methods O Introduction the creep strength at elevated temperatures; b) for soft solder A joint is not a homogeneous body but a heterogenous assem- bly formed from different materials having different physical the instantaneous shear strength, cold, at ambient and chemical properties. In the simplest case, it consists of filler temperature or hot, metal and the base metal. Diffusion phenomena occur at the the creep strength, coid, at ambient temperature or contact surfaces giving rise to, in the interface, a series of new hot; alloys different from one another and different from both the joining material and the base metal. for a given brazing filler metal, flux and base metal. In the study of the strength of such heterogeneous joints, the simplified hypotheses of the theory of elasticity valid for a So that the tests are reproducible and comparable, it is impor- homogeneous metallic body or stresses due to external forces tant to use tensile and shear specimens of a well-defined type and have recourse to a precise operating method. This Inter- transmitted uniformly from an element of surface or volume to neighbouring elements -- are no longer applicable. national Standard meets this objective. Hence, the notion of "joining material strength" needs to be Scope and field of application limited strictly to metal solidified after melting. Conversely,the strength of an assemblyis a function of the intrinsic strength of This Internationa! Standard defines the principles and the the filler metal and a series of external factors. It foilows that tests designed to determine this strength need to be carried out technique of the tests designed to determine the conventional according to precise conventions, taking into account, in addi- mechanical characteristics of assemblies produced with soft tion to the characteristics of the joining material itself, a series solders and brazing filler metals; it also specifies a method of of external factors, notably: interpreting the results obtained. compo