1、BRITISH STANDARD AEROSPACE SERIES BS EN 2259:1995 Silicone rubber (VMQ) Hardness 50 IRHD The European Standard EN2259:1995 has the status of a British Standard ICS 49.040.10 UDC 678.074:620.1:629.7BSEN2259:1995 This British Standard, having been prepared under the directionof the Engineering SectorB
2、oard, was published underthe authority of the Standards Board and comes intoeffect on 15November1995 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/25 Draft for comment94/714385DC ISBN 0 580 24075 4 Committees responsible for this British Standa
3、rd The preparation of this British Standard was entrusted to Technical Committee ACE/25, Rubber and elastomeric materials for aerospace purposes, upon which the following bodies were represented: British Adhesives and Sealants Association British Hydromechanics Research Group British Narrow Fabrics
4、Association British Rubber Manufacturers Association Ltd. Ministry of Defence Society of British Aerospace Companies Limited Amendments issued since publication Amd. No. Date CommentsBSEN2259:1995 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1
5、 Scope 3 2 Normative references 3 3 Application of the material 3 4 Properties 3 5 Designation 3 6 Technical specification 3 Table 1 Test methods 4 Table 2 Tests after exposure to test media 5 List of references Inside back coverBSEN2259:1995 ii BSI 11-1999 National foreword This British Standard ha
6、s been prepared by Technical Committee ACE/25 and is the English language version of EN2259:1995 Aerospace Series Silicone rubber (VMQ) Hardness50IRHD, published by the European Committee for Standardization (CEN). EN2259 was produced as a result of international discussion in which the UnitedKingdo
7、m took an active part. The European Standard EN3207, referred to in clause2, is in preparation and there is at present no corresponding British Standard. Preliminary copies of prEN3207 are available from: BNAE, Technopolis54,199 rue Jean Jacques Rousseau,92138 Issy les Moulineaux Cedex, Paris, Franc
8、e. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred
9、to Corresponding British Standard ISO1629:1987 BS3502 Symbols for plastics and rubber materials Part2:1991 Schedule for symbols for rubbers ISO1817:1985 BS903 Physical testing of rubber PartA16:1987 Determination of the effect of liquids Summary of pages This document comprises a front cover, an ins
10、ide front cover, pagesi andii, theEN title page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE
11、EUROPISCHE NORM EN2259 September1995 ICS 49.040.10 Descriptors: Aircraft industry, rubber, silicones, hardness English version Aerospace series Silicone rubber (VMQ) Hardness50IRHD Srie arospatiale lastomre silicone (VMQ) Duret50DIDC Luft- und Raumfahrt Silicon-Elastomer (VMQ) Hrte50IRHD This Europe
12、an Standard was approved by CEN on 1995-03-02. CEN members are bound to comply with the CEN/CENELEC 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 references concerni
13、ng 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 into its own lan
14、guage 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, Switzerland and
15、 United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its m
16、embers Ref. No. EN2259:1995EEN2259:1995 BSI 11-1999 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this standard has successively received the
17、approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March1996, and c
18、onflicting national standards shall be withdrawn at the latest by March1996. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Net
19、herlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom.EN2259:1995 BSI 11-1999 3 1 Scope This standard specifies the properties of silicone rubber (VMQ) 1) , hardness50IRHD, for aerospace applications. 2 Normative references This European Standard incorporates by dated or undated ref
20、erence 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 or revisions of any of these publications apply to this European Standard only when incorpor
21、ated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ISO1629, Rubber and latices Nomenclature. ISO1817, Rubber, vulcanized Determination of the effect of liquids. EN3207, Aerospace series Rubber compounds Technical specification 2) .
22、3 Application of the 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 For application as ozone and
23、 weather resistant rubber with good thermal properties. NOTEThe ozone resistance test is not required. 3.2 Temperature range 4 Properties See Table 1 and Table 2. For qualification, all tests shall be performed. For batch acceptance, the tests identified in Table 1 and Table 2 shall be performed. 5
24、Designation 6 Technical specification EN3207 1) Symbol as per ISO1629 2) In preparation at the date of publication of this standard Continuous service : from55 C to+200 C Intermittent service : from55 C to+260 CEN2259:1995 4 BSI 11-1999 Table 1 Test methods Line Column 1 2 3 Properties Units Require
25、ments 1 Hardness IRHD *) 2 3 Density Mg/m 3 1) *) 4 5 Tensile strength MPa 5min. *) 6 7 Elongation at break % 200min. *) 8 9 Modulus at% strain MPa 10 11 Tear strength N/mm 9min. 12 13 Resistance to low temperatures TR10 C 40max. 14 Crystallization Point 15 Compression set 15.1 after 70h to150 C % 3
26、5max. *) 15.2 after hto C 16 Ozone resistance 17 Ozone concentration Elongation of test piece Time Temperature : : : : ( ) pphm % h C 18 Corrosion and adhesion on metals in a dry atmosphere 19 Time Temperature : : h C 20 Corrosion and adhesion on metals in a damp atmosphere 20.1 Time Temperature Hum
27、idity : : : h C % 20.2 Time Temperature Humidity : : : h C % 21 22 23 24 25 26 27 28 39 30 * Test for batch acceptance 1) The value determined for each batch shall not differ from that determined at qualification by more than0,02Mg/m 3 . 50 + 5 4EN 2259:1995 BSI 11-1999 5 Table 2 Tests after exposur
28、e to test media Line Column 1 2 3 4 5 1 Test media Air Oil No.1 see ISO1817 Test fluid101 see ISO1817 2 Conditions of exposure in test media Units 70h/225 C 70h/150 C 70h/150 C 3 Permitted variation of the properties compared to the initial value Volume % a 4 Mass % 5 Tensile strength % 20max. 25max
29、. 6 Elongation at break % 40max. 20max. 7 Hardness IRHD 8 a Test for batch acceptance + 10 0 + 40 0 + 10 10 0 106 blankBSEN2259:1995 BSI 11-1999 List of references See national foreword.BS EN 2259:1995 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent nat
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