1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 2844:2013Aerospace series Acrylonitrile-butadiene rubber (NBR) Mineral oil resistant Hardness 90 IRHDBS EN 2844:2013 BRITISH STANDARDNational forewordThis British Standard
2、is the UK implementation of EN 2844:2013. 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 pur
3、port 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 80352 9 ICS 49.025.40 Compliance with a British Standard cannot confer immunityfrom legal obli
4、gations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2013.Amendments issued since publicationDate Text affectedBS EN 2844:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2844 February 2013 ICS 49.025.40 English Version
5、 Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Mineral oil resistant - Hardness 90 IRHD Caoutchouc acrylonitrile-butadine rsistant lhuile minrale (NBR) - Degr de duret 90 - Caractristiques Luft- und Raumfahrt - Minerallresistente Acrylnitril-Butadien Elastomer (NBR) - Hrte 90 IRHD This E
6、uropean Standard was approved by CEN on 3 November 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-date lists and bibliographical reference
7、s 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 under the responsibility of a CEN mem
8、ber 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, Former Yugoslav Republic of Macedonia, Fr
9、ance, 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 EUROPEN DE NORMALISATION EUROPISCHES
10、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 2844:2013: EBS EN 2844:2013EN 2844:2013 (E) 2 Contents Page Foreword . 3 1 Scope 4 2 Normative references
11、. 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 Bibliography 7 BS EN 2844:2013EN 2844:2013 (E) 3 Foreword This document (EN 2844:2013) has been prepared by the Aerospace and Defence Indus
12、tries 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 to its presentation t
13、o 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 the possibility that s
14、ome 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 countries are bound to im
15、plement 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, Poland, Portugal, Roman
16、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 2844:2013EN 2844:2013 (E) 4 1 Scope This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) 1), mineral oil resistant, hardness 90 IRHD, for aerospace applications. 2 Normative re
17、ferences 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 any amendments) applies
18、. 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 specific application shall be determined by complementary tests ca
19、rried 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 range Continuous service : from 40 C to 120 C; I
20、ntermittent 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 2844:2013EN 28
21、44:2013 (E) 5 Table 1 Test methods Line Column 1 2 3 Properties Units Requirements 1 Hardness IRHD 90 45+a 2 3 Density Mg/m3a, b 4 5 Tensile strength MPa 12,5 min. a6 7 Elongation at break % 120 min. a8 9 Modulus at % strain MPa 10 11 Tear strength N/mm 12 13 Resistance to low temperatures TR 10 C 1
22、0 max. 14 Crystallization Point 15 Compression set % 15.1 After 24 h to 125 C 45 max. a15.2 After 70 h to 125 C 50 max. 16 17 Ozone resistance Ozone concentration : ( ) pphm Elongation of test piece : % Time : h Temperature : C 18 19 Corrosion and adhesion on metals Time : 168 h Temperature : 100 C
23、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 at qualification by mo
24、re than 0,02 Mg/m3. BS EN 2844:2013EN 2844:2013 (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 of the properties compared to the initial val
25、ue Volume % 80a010+a4 Mass % 5 Tensile strength % 10 a 10 10 6 Elongation at break % 50 a 40 30 7 Hardness IRHD 08+a010+808 aTest for batch acceptance. 5 Designation EXAMPLE Description block RUBBER Identity block EN2844 Number of this standard 6 Technical specification See EN 3207. BS EN 2844:2013E
26、N 2844:2013 (E) 7 Bibliography 1 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 other standards-related publications, information and services. It present
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