1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 2838:2013Aerospace series Chloroprene rubber (CR) Heat resistance Hardness 70 IRHDBS EN 2838:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implement
2、ation of EN 2838:2013. 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 2013. Published by BSI Standards Limited 2013.ISBN 978 0 580 80347 5 ICS 49.025.40 Compliance with a British Standard cannot confer immunityfrom legal obligations.This Britis
4、h Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2013.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 2838:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2838 February 2013 ICS 49.025.40 English Version Aerospac
5、e series - Chloroprene rubber (CR) - Heat resistance -Hardness 70 IRHD Srie arospatiale - lastomre chloroprne (CR) - Rsistant la chaleur - Duret 70 IRHD Luft- und Raumfahrt - Chloropren-Elastomer (CR) - Wrmebestndig - Hrte 70 IRHD This European Standard was approved by CEN on 3 November 2012. CEN me
6、mbers 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 concerning such national standards may be obtained on applica
7、tion to 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 Manag
8、ement Centre 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia
9、, Lithuania, Luxembourg, Malta, Netherlands, Norway, 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
10、Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2838:2013: EBS EN 2838:2013EN 2838:2013 (E) 2 Contents Page Foreword . 3 1 Scope 4 2 Normative references . 4 3 Application of the material . 4 3.1 General . 4 3.2 Typic
11、al use . 4 3.3 Temperature range . 4 4 Properties . 4 5 Designation 6 6 Technical specification 6 BS EN 2838:2013EN 2838:2013 (E) 3 Foreword This document (EN 2838:2013) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and
12、votes carried out in accordance with the rules of this Association, this Standard has received the approval 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
13、, either by publication of an identical text or by endorsement, at the latest by August 2013, and conflicting national standards shall be withdrawn at the latest by August 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN
14、and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, C
15、zech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United King
16、dom. BS EN 2838:2013EN 2838:2013 (E) 4 1 Scope This European Standard specifies the properties of chloroprene rubber (CR) 1)heat resistant, hardness 70 IRHD, for aerospace applications. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document a
17、nd are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3207, Aerospace series Rubber compounds Technical specification ISO 1629, Rubber and latices No
18、menclature 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 specific application shall be determined by complementary tests carried out on the finished product as the properties specif
19、ied 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 moderate resistance to petroleum based fuels and lubricants. 3.3 Temperature range Continuous service : from 40 C to 120 C
20、; 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 tests identified with footnote “a“ in Table 1 and Table 2 shall be performed. 1) Symbol as per ISO 1629.BS EN 2838:2013EN
21、 2838:2013 (E) 5 Table 1 Test methods Line Column 1 2 3 Properties Units Requirements 1 Hardness IRHD 70 45+a2 3 Density Mg/m3a, b4 5 Tensile strength MPa 15 min. a6 7 Elongation at break % 250 min. a8 9 Modulus at % strain MPa 10 11 Tear strength N/mm 12 13 Resistance to low temperatures TR 10 C 25
22、 max. 14 Crystallization 168 h at 10 C Point 15 Compression set % 15.1 After 24 h to 125 C 40 max. a15.2 After h to C 16 17 Ozone resistance Ozone concentration : (50 5) pphm Elongation of test piece : 20 % Time : 70 h Temperature : 30 C nil cracking 18 19 Corrosion and adhesion on metals Time : 168
23、 h Temperature : 100 C no corrosion no adhesion 20 Corrosion and adhesion on metals 20.1 Time : h Temperature : C Humidity : % 20.2 Time : h Temperature : C Humidity : % 21 22 23 24 25 26 27 28 29 30 aTest for batch accepted. bThe value determined for each batch shall not differ from that determined
24、 at qualification by more than 0,02 Mg/m3. BS EN 2838:2013EN 2838:2013 (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 media Units 70 h/125 C 70 h/23 C 3 Permitted variation of the properties compared to the initial value Volume % +
25、70 a 4 Mass % 5 Tensile strength % 1015+a 6 Elongation at break % 305+a 7 Hardness IRHD 08+a 8 aTest for batch acceptance. 5 Designation EXAMPLE Description block RUBBER Identity block EN2838 Number of this standard 6 Technical specification See EN 3207. This page deliberately left blankBSI is the i
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