1、CEN ENx25754 93 3404589 0047344 215 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 25754 April 1993 UM= 621.762.5 : 669-492.2 : 610.178.742 Descriptors: Powder metallurgy, sintered products, mechanical tests, impact tests, specimen preparation, dimensions English version Sintered metal materia
2、ls, excluding hardmetals - Unnotched impact test piece (IS0 5754 : 1978) Matriaux mtalliques fritts, 1 exclusion des mtaux-durs - Eprouvettes non entailles pour essai de rsilience (IS0 5754 : 1978) Sintermetalle, ausgenommen Hartmetalle - Ungekerbte Probe fr den Schlagzhigkeitsversuch (IS0 5754 : 19
3、78) This European Standard was approved by CEN on 1993-04-02. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical refer
4、ences concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member in
5、to its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, S
6、witzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1993 Copyright reserved to CEN members Ref. No. EN 25754 : 1993 E CEN ENS25754 93 m 3404589 0047145 151 m
7、 Page 2 EN 26764 : 1993 Foreword In 1992, IS0 5754 : 1978 Sintered metal materials, excluding hardmetals - Unnotchd impact test piece was submitted to the CEN Primary Questionnaire procedure. Following the positive result of the CENKS proposal IS0 5754 : 1978 was submitted to the CEN Formal Vote. Th
8、e result of the Formal Vote was positive. This European Standard shall be given the status of national standard, either by publication of an identical text or by endorsement, at the latest by October 1993 and conflicting national standards shall be withdrawn at the latest by October 1993. According
9、to the Internal Regulations of CENKENELEC, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. NOTE. The Eur
10、opean references to international publications are given in annex ZA (normative). CEN EN*K25754 93 3404589 0047346 098 55 I 1 Page 3 EN 25754 : 1993 10 2 0.2 10 t 0.2 Sintered metal materials, excluding hardmetals - Unnotched impact test piece 1 SCOPE This International Standard specifies the dimens
11、ions of an unnotched impact test piece of sintered metal materials. The test piece may be obtained directly by pressing and sintering or by machining a sintered part. 2 FIELD OF APPLICATION This international Standard applies to all sintered metais and alloys, with the exception of hardmetals. Howev
12、er, for certain materials (for example, materials having low porosity or materials with high ductility), it may be more appropriate to use a notched test piece which, in this case, will give results with less scatter. (In this case, refer to IS0 83 or IS0 148.) NOTE - For porous sintered materiais,
13、the results obtained from impact tests are not necessarily very accurate and should not be compared with results obtained from tests on solid metals. 3 REFERENCES IS0 83, Steel - Charpy impact rest (U-notch). IS0 148, Steel - Charpy impact rest fV-notch). ) 4 DIMENSIONS OF TEST PIECE The dimensions
14、of the test piece shall be those shown in the table. i I I 1 i L I l * Values in millimetres A B 1) At present at the stage of draft. (Revision of ISO/R 148.) Page 4 EN 25754 : 1993 CEN EN*:25754 93 3404589 0047347 T24 Annex ZA (normative) Normative references to international publications with thei
15、r relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to
16、 or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). Publication Year Title EN/HD - Year IS0 83 Steel - Charpy impact test (U-notch) - - IS0 148 Steel - Charpy impact test (V-notch) - -
