1、EN PRENr22bL 94 3404589 0066330 63T 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 ISSY - LES - MOULINEAUX CEDEX - FRANCE prE
2、N 2261 Edition 1 July 1994 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AkROSPATIAL 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, silicones, hardness ENG
3、LISH VERSION Arospace series Silicone rubber (VMQ) Hardness 70 IRHD Srie arospatiale lastomre silicone (VMQ) Duret 70 DIDC Luft- und Raumfahrt Silicon-Elastomer WMQ) Hrte 70 IRHD This “Aerospace series“ Standard has been drawn up under the responsibility of AECMA (Association Europenne des Construct
4、eurs 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 formal vote. CEN PRENx2261 Y m 3404589 0066131 576 Page 3 prEN 2261 : 1994 1 scope
5、This standard specifies the properties of silicone rubber (VMQ) I), hardness 70 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 appropriate place
6、s 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 publication referr
7、ed to applies. IS0 1629 Rubber and latices - Nomenclature IS0 181 7 Rubber, vulcanized - Determination of the effect of liquids EN 3207 Aerospace series - Rubber compounds - Technical specification 2) 3 Application of the material The suitability of the material for a specific application shall be d
8、etermined 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 test is not req
9、uired. 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 performed. 5 Designat
10、ion Description block I Identity block RUBBER I- l Number of this standard I 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 PREN*2263 94 3404589 0066332 402 Density Page 4 prEN 2261 : 1994 Mglm3 1)
11、) Line Tensile strength Elongation at break E 15 M Pa 5 min. “1 % 150 min.“) 15.; Tear strength 17 I I Nlmm I 9 min. y 20 Resistance to low temperatures TR1 O Crystallization 1 20.1 OC - 40 max. Point I Compression set after 70 h to 150 OC after - h to - OC Ozone resistance Ozone concentration : (
12、 I - 1 pphm Elongation of test piece : % Time h Temperature OC Corrosion and adhesion on metals in a dry atmosphere Time :-h Temperature : - OC Corrosion and adhesion on metals in a damp atmosphere Time :-h Temperature : - OC Humidity : - Yo Time :-h Temperature : - OC Humidity : -% I 20.2 % 40 max
13、 “1 28 Table 1 - Test methods 1 Properties Units I Requirements Hardness Modulus at - % strain I MPa I *) 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. - CEN PRENM22bL 94 3404587 0066333 347 = Units
14、70 h/225 OC Page 5 prEN 2261 : 1994 Table 2 - lests after exposure to test media 1 Column Line 51 4 Test media Oil No. 1, see IS0 1817 1 No. 101, see 70 h/l50 OC Conditions of exposure in test media 2 70 hl150 OC 3 Volume %I - +10 +I O 4 Mass %I - Permitted variation of the properties compared to the initial value Tensile strength % 1 -25 max.- 5 6 - 20 max. Elongation at break % I -40max. - 15 max. O - 10 Hardness 7 a “1 Test for batch acceptance
