1、BRITISH STANDARD AEROSPACE SERIES BS EN 2261:1995 Silicone rubber (VMQ) Hardness 70 IRHD The European Standard EN 2261:1995 has the status of a British Standard ICS 49.040.10 UDC 678.074:620.1:629.7BSEN 2261:1995 This British Standard, having been prepared under the directionof the Engineering Secto
2、rBoard, 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 comment 94/714387 DC ISBN 0 580 24086 X Committees responsible for this British St
3、andard 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 Fabr
4、ics Association British Rubber Manufacturers Association Ltd. Ministry of Defence Society of British Aerospace Companies Limited Amendments issued since publication Amd. No. Date CommentsBSEN2261:1995 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword
5、 2 1 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 coverBSEN2261:1995 ii BSI 11-1999 National foreword This British Standar
6、d has been prepared by Technical Committee ACE/25 and is the English language version of EN2261:1995 Aerospace Series Silicone rubber (VMQ) Hardness70IRHD, published by the European Committee for Standardization (CEN). EN2261 was produced as a result of international discussion in which the UnitedKi
7、ngdom 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,
8、France. 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 refe
9、rred to Corresponding British Standard ISO 1629:1987 BS 3502 Symbols for plastics and rubber materials Part 2:1991 Schedule for symbols for rubbers ISO 1817:1985 BS 903 Physical testing of rubber Part A16:1987 Determination of the effect of liquids Summary of pages This document comprises a front co
10、ver, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, 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
11、NORME EUROPENNE EUROPISCHE NORM EN 2261 September 1995 ICS 49.040.10 Descriptors: Aircraft industry, rubber, silicones, hardness English version Aerospace series Silicone rubber (VMQ) Hardness 70 IRHD Srie arospatiale lastomre silicone (VMQ) Duret 70 DIDC Luft- und Raumfahrt Silicon-Elastomer (VMQ)
12、Hrte 70 IRHD This European Standard was approved by CEN on1995-03-02. 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 bibliographi
13、cal references 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
14、member into 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,
15、Sweden, Switzerland 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 1995 All rights of reproduction and communication in any form and by any means reserved in all cou
16、ntries to CEN and its members Ref. No. EN 2261:1995 EEN2261:1995 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 s
17、uccessively received the 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 l
18、atest by March1996, and conflicting 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, Irelan
19、d, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom.EN2261:1995 BSI 11-1999 3 1 Scope This standard specifies the properties of silicone rubber (VMQ) 1) , hardness70IRHD, for aerospace applications. 2 Normative references This European Standard incorporate
20、s 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 or revisions of any of these publications apply to this European St
21、andard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ISO 1629, Rubber and latices Nomenclature. ISO 1817, Rubber, vulcanized Determination of the effect of liquids. EN 3207, Aerospace series Rubber compounds T
22、echnical specification 2) . 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
23、For application as ozone and weather resistant rubber with good thermal properties. NOTEThe ozone resistance test is not required. 3.2 Temperature range 4 Properties SeeTable 1 andTable 2. For qualification, all tests shall be performed. For batch acceptance, the tests identified inTable 1 andTable
24、2 shall be performed. 5 Designation 6 Technical specification EN3207 1) Symbol as per ISO1629 2) In preparation at the date of publication of this standard Continuous service : from 55 C to + 200 C Intermittent service : from 55 C to + 260 CEN2261:1995 4 BSI 11-1999 Table 1 Test methods Line Column
25、1 2 3 Properties Units Requirements 1 Hardness IRHD 70 *) 2 3 Density Mg/m 3 1) *) 4 5 Tensile strength MPa 5 min. *) 6 7 Elongation at break % 150 min. *) 8 9 Modulus at % strain MPa 10 11 Tear strength N/mm 8 min. 12 13 Resistance to low temperatures TR10 C 40 max. 14 Crystallization Point 15 Comp
26、ression set 15.1 after 70hto150 C % 40 max. *) 15.2 after hto C 16 Ozone resistance Ozone concentration: ( )pphm 17 Elongation of test piece : % Time : h Temperature : C 18 Corrosion and adhesion on metals in a dry atmosphere 19 Time:h Temperature: C 20 Corrosion and adhesion on metals in a damp atm
27、osphere 20.1 Time:h Temperature: C Humidity:% 20.2 Time:h Temperature: C Humidity:% 21 22 23 24 25 26 27 28 29 30 *) Test for batch acceptance 1) The value determined for each batch shall not differ from that determined at qualification by more then 0,02 Mg/m 3 . +5 4EN 2261:1995 BSI 11-1999 5 Table
28、 2 Tests after exposure to test media Line Column 1 2 3 4 5 1 Test media Air Oil No. 1 seeISO1817 Test fluid 101 seeISO 1817 2 Conditions of exposure in test media Units 70 h/225 C 70 h/150 C 70 h/150 C 3 Permitted variation of the properties compared to the initial value Volume % + 10 a 0 + 35 0 4
29、Mass % 5 Tensile strength % 25 max. 20 max. 6 Elongation at break % 40 max. 15 max. 7 Hardness IRHD + 10 10 0 10 8 a Test for batch acceptance6 blankBSEN2261:1995 BSI 11-1999 List of references See national foreword.BS EN 2261:1995 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitut
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