1、CEN PREN*:2432 94 3404589 0066354 073 m Edition approved for publication 1994-07-25 AECMA STANDARD NORME AECMA AECMA NORM The equivalent versions in French and German languages can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau 92138 ISCY - LES - MOULINEAUX CEDEX - FRANCE
2、prEN 2432 Edition 1 July 1994 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : 678.074 : 620.1 : 629.7 Descriptors : Aircraft industry, rubber, ethylene-propylene r
3、ubber, hardness ENGLISH VERSION Aerospace series Ethylene-propylene rubber (EPM/EPDM) Hardness 90 IRHD Srie arospatiale Luft- und Raumfahrt lastomre thylne-propylne (EPMIEPDM) Ethylen-Propylen-Elastomer (EPMIEPDMI Duret 90 DIDC Hrte 90 IRHD This ”Aerospace series” Standard has been drawn up under th
4、e responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). it is published on yellow paper in three equivalent versions (English, French, German). it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formai vote. CEN PR
5、ENx2432 94 3V04589 0066355 TOT Page 3 prEN 2432 : 1994 1 Scope This standard specifies the properties of ethylene-propylene rubber (EPM/EPDM) 11, hardness 90 IRHD, for aerospace applications. 2 Normative references This European Standard incorporates by dated or undated reference provisions from oth
6、er 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 or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or
7、 revision. For undated references the latest edition of the publication referred to applies. IS0 1629 IS0 181 7 EN 3207 Rubber and latices - Nomenclature Rubber, vulcanized - Determination of the effect of liquids Aerospace series - Rubber compounds - Technical specification 2) 3 Application of the
8、material The suitability of the material for a specific application shall be determined by complementary tests carried out on the finished product as the properties specified in this standard are obtained from standard test specimens. 3.1 Typical use Application requiring a resistance to ozone, weat
9、her and phosphate ester based hydraulic fluids. NOTE : This material shall not be used for the manufacture of dynamic seals in flight hydraulic systems. 3.2 Temperature range - Continuous service : from - 55 OC to + 125 OC - Intermittent service : from - 55 OC to + 160 OC 4 Properties See tables 1 a
10、nd 2. For qualification, all tests shall be performed. For batch acceptance, the tests identified in tables 1 and 2 shall be performed. 5 Designation Description block RUBBER identity block EN2432 Number of this standard 6 Technical specification EN 3207 1 I Symbol as per IS0 1629 2) in preparation
11、at the date of publication of this standard Previous page is blank CEN PRENa2432 74 3404587 0066356 946 Elonaation at break % Modulus at - % strain Tear strenath M Pa N/mm Resistance to low temperatures TRI O Crystallization Compression set after 70 h to 100 OC after - h to - OC Ozone resistance Ozo
12、ne concentration : ( 200 f20 ) pphm Time 168 h Elongation of test piece : 20 % Temperature 30 OC Corrosion and adhesion on metais in a dry atmosphere Time -h Temperature : - OC Corrosion and adhesion on metals in a damp atmosphere Time :-h Temperature : - OC Humidity -% Temperature : - oc Humidity -
13、% Time : - Oh OC Point % Page 4 prEN 2432 : 1994 Table 1 - Test methods Column .ne 1 2 3 Requirements .-. I Properties I Units 1 Hardness I IRHD I Density Mglm3 2 3 4 Tensile strength I MPa 11 min. “1 120 min.“) 5 6 - 7 8 9 10 11 15 min. 12 13 - 30 mx 14 15 15.1 15.2 16 40 max. *) Nil cracking 17 18
14、 19 20 20.1 20.2 21 22 23 24 25 26 27 28 29 *) Test for batch acceptance. 1) The value determined for each batch shall not differ from that determined at qualification by more than 0,02 Mg/m3. Column Line 4 1 5 2 3 4 5 6 7 8 CEN PRENx2432 94 3404589 0066357 862 Page 5 prEN 2432 : 1994 Table 2 - Test
15、s after exposure to test media 1 Test media Conditions of exposure in test media Volume Per mitt ed Tensile variation of the properties compared to the initial value Hardness 2 Units % % % % IRHD 3 Air 70 h/125 OC O - 15 O - 20 + 10 0 Test fluid No. 103, see IS0 1817 24 h/100 OC +20 *I -Y- + - 20 O -Y- *) Test for batch acceptance.
