1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 2835:2012Aerospace series Chloroprene rubber (CR) Heat resistance Hardness 40 IRHDBS EN 2835:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implement
2、ation of EN 2835:2012. The UK participation in its preparation was entrusted to TechnicalCommittee ACE/65, Non-metallic materials for aerospace purposes. A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all
3、 the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 77373 0 ICS 49.025.40 Compliance with a British Standard cannot confer immunity from legal obligations.This British
4、Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 2835:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2835 March 2012 ICS 49.025.40 English Version Aerospace series
5、 - Chloroprene rubber (CR) - Heat resistance -Hardness 40 IRHD Srie arospatiale - lastomre chloroprne (CR) - Rsistant la chaleur - Duret 40 DIDC Luft- und Raumfahrt - Chloropren-Elastomer (CR) - Wrmebestndig - Hrte 40 IRHD This European Standard was approved by CEN on 21 January 2012. CEN members ar
6、e 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 concerning such national standards may be obtained on application to
7、the CEN-CENELEC Management Centre 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 language and notified to the CEN-CENELEC Management Ce
8、ntre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No
9、rway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in
10、 any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2835:2012: EBS EN 2835:2012EN 2835:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Application of the material 44 Properties .45 Designation 66 Technical specification .6Bibliography 7BS EN 2835
11、:2012EN 2835:2012 (E) 3 Foreword This document (EN 2835:2012) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval
12、of the National Associations and the Official Services of the member countries of ASD, 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 September 2012, and conflic
13、ting national standards shall be withdrawn at the latest by September 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According
14、to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, L
15、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 2835:2012EN 2835:2012 (E) 4 1 Scope This European Standard specifies the properties of chloroprene rubber (CR) 1)heat resistant, h
16、ardness 40 IRHD, for aerospace applications. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of
17、 the referenced document (including any amendments) applies. EN 3207, Aerospace series Rubber compounds Technical specification ISO 1817, Rubber, vulcanized or thermoplastic Determination of the effect of liquids 3 Application of the material 3.1 General The suitability of the material for a specifi
18、c 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. 3.2 Typical use For applications where resistance to atmospheric ageing and ozone attack is required coupled with moder
19、ate resistance to petroleum based fuels and lubricants. 3.3 Temperature range Continuous service : from 40 C to 120 C; Intermittent service : from 40 C to 150 C. 4 Properties See Table 1 and Table 2 according to EN 3207. For qualification, all tests shall be performed. For batch acceptance, the test
20、s identified with footnote “ in Table 1 and Table 2 shall be performed. 1) Symbol as per ISO 1629. BS EN 2835:2012EN 2835:2012 (E) 5 Table 1 Test methods Line Column1 2 3Properties Units Requirements1 Hardness IRHD 40 45+ 2 3 Density Mg/m3a 4 5 Tensile strength MPa 11 min. 6 7 Elongation at break %
21、500 min. 8 9 Modulus at % strain MPa 10 11 Tear strength N/mm 12 13 Resistance to low temperatures TR 10 C 30 max. 14 Crystallization 168 h at 10 C Point + 5 15 Compression set % 15.1 After 24 h to 125 C 40 max. 15.2 After h to C 16 17 Ozone resistance Ozone concentration : (50 5) pphm Elongation of
22、 test piece : 20 % Time : 70 h Temperature : 30 C nil cracking 18 19 Corrosion and adhesion on metals Time : 168 h Temperature : 100 C no corrosion no adhesion 20 Corrosion and adhesion on metals 20.1 Time : hTemperature : C Humidity : % 20.2 Time : h Temperature : C Humidity : % 21 22 23 24 25 26 2
23、7 28 29 30 Test for batch accepted. aThe value determined for each batch shall not differ from that determined at qualification by more than 0,02 Mg/m3. BS EN 2835:2012EN 2835:2012 (E) 6 Table 2 Tests Line Column 1 2 3 4 5 1 Test media Air Liquid B, see ISO 1817 2 Conditions of exposure in test medi
24、a Units 70 h/125 C 70 h/23 C 3 Permitted variation of the properties compared to the initial value Volume % + 100 4 Mass % 5 Tensile strength % 1015+ 6 Elongation at break % 305+ 7 Hardness IRHD 010+ 8 Test for batch acceptance. 5 Designation EXAMPLE Description block RUBBER Identity block EN2835 Nu
25、mber of this standard 6 Technical specification See EN 3207. BS EN 2835:2012EN 2835:2012 (E) 7 Bibliography ISO 1629, Rubber and latices Nomenclature This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standards and
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