1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 2840:2013Aerospace series Acrylonitrile-butadiene rubber (NBR) Mineral oil r e s i s t a n t H a r d n e s s 5 0 I R H DBS EN 2840:2013 BRITISH STANDARDNational forewordThi
2、s British Standard is the UK implementation of EN 2840:2013. 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 publi
3、cation does not purport to include all 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 80157 0 ICS 49.025.40 Compliance with a British Standard cannot confer immu
4、nityfrom legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2013.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 2840:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2840 February 2013 ICS
5、 49.025.40 English Version Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Mineral oil resistant - Hardness 50 IRHD Srie arospatiale - lastomre acrylonitrile butadine (NBR) - Rsistant aux huiles minrales - Duret 50 DIDC Luft- und Raumfahrt - Acrylnitril-Butadien-Elastomer (NBR) - Bestndig
6、gegen Mineralle - Hrte 50 IRHD This European Standard was approved by CEN on 27 October 2012. 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-dat
7、e lists and bibliographical references concerning such national standards may be obtained on application 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
8、under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management 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, Form
9、er 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT
10、EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2840:2013: EBS EN 2840:2013EN 2840:2013 (E) 2 Contents Page Foreword
11、. 3 1 Scope 4 2 Normative references . 4 3 Application of the material . 4 3.1 General . 4 3.2 Typical use . 4 3.3 Temperature range . 4 4 Properties . 4 5 Designation 6 6 Technical specification 6 BS EN 2840:2013EN 2840:2013 (E) 3 Foreword This document (EN 2840:2013) has been prepared by the Aeros
12、pace 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 of the National Associations and the Official Services of the member countries of ASD, prior
13、 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 August 2013, and conflicting national standards shall be withdrawn at the latest by August 2013. Attention is drawn to
14、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 to the CEN/CENELEC Internal Regulations, the national standards organisations of the following cou
15、ntries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, P
16、oland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 2840:2013EN 2840:2013 (E) 4 1 Scope This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) 1), mineral oil resistant, hardness 50 IRHD, for aerospace applic
17、ations. 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 the referenced document (including a
18、ny amendments) applies. EN 3207, Aerospace series Rubber compounds Technical specification ISO 1629, Rubber and latices Nomenclature ISO 1817, Rubber, vulcanized Determination of the effect of liquids 3 Application of the material 3.1 General The suitability of the material for a specific applicatio
19、n 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 petroleum based hydraulic fluids and lubricants is required. 3.3 Temperature r
20、ange 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 tests identified with footnote “a“ in Table 1 and Table 2 shall be performed.
21、 1) Symbol as per ISO 1629. BS EN 2840:2013EN 2840:2013 (E) 5 Table 1 Test methods Line Column 1 2 3 Properties Units Requirements 1 Hardness IRHD 50 45+a2 3 Density Mg/m3a, b4 5 Tensile strength MPa 10 min. a6 7 Elongation at break % 400 min. a8 9 Modulus at % strain MPa 10 11 Tear strength N/mm 12
22、 13 Resistance to low temperatures TR 10 C 25 max. 14 Crystallization Point 15 Compression set % 15.1 After 24 h to 125 C 35 max. a15.2 After 70 h to 125 C 40 max. 16 17 Ozone resistance Ozone concentration : ( ) pphm Elongation of test piece : % Time : h Temperature : C 18 19 Corrosion and adhesion
23、 on metals Time : 168 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
24、 from that determined at qualification by more than 0,02 Mg/m3. BS EN 2840:2013EN 2840:2013 (E) 6 Table 2 Tests Line Column 1 2 3 4 5 1 Test media Air Oil No. 1, see ISO 1817 Oil No. 3, see ISO 1817 2 Conditions of exposure in test media Units 70 h/125 C 70 h/125 C 70 h/125 C 3 Permitted variation o
25、f the properties compared to the initial value Volume % 150a525+a4 Mass % 5 Tensile strength % 10 a 10 10 6 Elongation at break % 45 a 40 30 7 Hardness IRHD 012a020+1508 aTest for batch acceptance. 5 Designation EXAMPLE Description block RUBBER Identity block EN2840 Number of this standard 6 Technic
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