1、 CEN PREN*2259 94 W 3404589 OObb322 5b3 AECMA STANDARD NORME AECMA AECMA NORM prEN 2259 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. Il) 47.36.98.76 UDC : 678.074
2、 : 620.1 : 629.7 Descriptors : Aircraft industry, rubber, silicones, hardness ENGLISH VERSION Aerospace series Silicone rubber (VMQ) Hardness 50 IRHD Srie arospatiale lactomGre silicone (VMQl Duret 50 DIDC Luft- und Raumfahrt Silicon-Elastomer (VMQI Hrte 50 IRHD This “Aerospace series“ Standard has
3、been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on yello w paper in three equivalent versions (English, French, German). it wiii be submitted as a draft European Standard to CEN (European Committee for Standardization)
4、for formal vote. Edition approved for publication 1994-07-25 The equivalent versions in French and German languages can be supplied by B.N.A.E. - Technopoiis 54 - 199, rue Jean-Jacques Rousseau 921 38 ISSY - LES - MOULINEAUX CEDEX - FRANCE Page 3 prEN 2259 : 1994 CEN PREN*2259 94 M 3404589 00bbL23 4
5、TT 1 Scope This standard specifies the properties of silicone rubber (VMQ) 11, hardness 50 IRHD, for aerospace applications. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the approp
6、riate 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 revision. For undated references the latest edition of the publica
7、tion 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 material The suitability of the material for a specific application
8、 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 For application as ozone and weather resistant rubber with good thermal properties, NOTE : The ozone resistance
9、 test is not required. 3.2 Temperature range - Continuous service : from - 55 OC to + 200 OC - intermittent service : from - 55 OC to + 260 OC 4 Properties See tables 1 and 2. For qualification, all tests shall be performed. For batch acceptance, the tests identified in tables 1 and 2 shall be perfo
10、rmed 5 Designation Description block RUBBER Identity block EN2259 I Number of this standard 1 6 Technical specification EN 3207 1) Symbol as per IS0 1629 2) In preparation at the date of publication of this standard Previous page is blank - CEN PREN32259 74 3404587 0066124 336 Properties Hard ness P
11、age 4 prEN 2259 : 1994 Units IRHD Column ,ne 2 3 1 Density Mglm3 Table 1 - Test methods 6 7 8 3 Elongation at break % 1 Modulus at - % strain I 2 MPa 1 Tear strenath N/mm I 9 min. Resistance to low temperatures TR1 O Crystalliza t io n Compression set after 70 h to 150 OC after - h to - OC Ozone res
12、istance Ozone concentration : ( - I - 1 pphm Elongation of test piece : % Time h Temperature OC Corrosion and adhesion on metals in a dry atmosphere Time :-h TemDerature : - OC OC - 40 max. Point % 35 max. *) 9 22 10 1 11 . 12 - 13 14 15 15.1 15.2 16 17 18 19 Reauirements + 5 *) 50- 4 5 min. *) 200
13、min.*) 20 20.1 20.2 21 Corrosion and adhesion on metals in a damp atmosphere Time :-h Temperature : - OC Humidity :-% Time :-h Temperature : - OC Humidity :-% 23 24 25 28 1 I I 39 1 30 *) Test for batch acceptance. 1) The value determined for each batch shall not differ from that determined at quali
14、fication by more than 0,02 Mg/m3. Page 5 prEN 2259 : 1994 1 2 3 4 5 - 6 7 8 Table 2 - Tests after exposure to test media Test media Conditions of exposure in tes Permitted variation of the properties compared to the initial value media Volume Mass Tensile strength Elongation at break Hardness 2 Units % % % % IRHD 3 Air 70 h/225 OC - 20 max. - 40 max. + 10 - 10 Oil No. 1, Test fluid No. 101, see I 70 h/l50 OC 70 h/l50 OC I I- - 25 max. - 20 max. I-
