ASD-STAN PREN 2798-2016 Aerospace series Fluorocarbon rubber (FKM) Low compressions set Hardness 80 IRHD (Edition P 2).pdf

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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 2798 Edition P 2 October 2016 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: Supersedes edition P

2、1 of April 1995 Descriptors: ENGLISH VERSION Aerospace series Fluorocarbon rubber (FKM) Low compressions set Hardness 80 IRHD Luft- und Raumfahrt Fluorocarbon-Elastomer (FKM) Niedriger Druckverformungsrest Hrte 80 IRDH Srie arospatiale lastomre fluor (FKM) Faible dformation rmanente aprs compression

3、 Duret 80 DIDC This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts

4、of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by us

5、ers and formal agreement of ASD-STAN, the ASD-STAN prEN will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by

6、 giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. ASD-STAN Technical Committee approves that: “This document is published by ASD-STAN for the needs of the European Aerospace Industry. The use of this standard is entirely voluntary, an

7、d its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” ASD-STAN reviews each standard and technical report at least every five years at which time it may be revised, reaffirmed, stabilized or cancelled

8、. ASD-STAN invites you to send your written comments or any suggestions that may arise. All rights reserved. No parts of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, withou

9、t prior written permission of ASD-STAN. Order details: E-mail: salesasd-stan.org Web address: http:/www.asd-stan.org/ Edition approved for publication 1st October 2016 Comments should be sent within six months after the date of publication to ASD-STAN Material Domain Copyright 2016 ASD-STAN prEN 279

10、8:2016 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Application of the material 3 4 Properties 3 5 Designation . 5 6 Technical specification . 5 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Material Domain. After inquiries and votes carr

11、ied out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 2798:2016 (E) 3 1 Scope This standard specifies the properties of fluorocarbon rubber (FKM)1), low compression set, hardness 80 IRDH, for aerospace

12、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 the referenced document (inclu

13、ding any 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 appl

14、ication 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 Application requiring a resistance to air, hydrocarbon and synthetic oils, fuels at elevated temperature and

15、low compression set properties. 3.3 Temperature range Continuous service: from 20 C to 225 C; Intermittent service: from 20 C to 250 C. 4 Properties See Table 1 and Table 2. For qualification, all tests shall be performed. For batch acceptance, those identified “ shall be performed. 1) Symbol as per

16、 ISO 1629. prEN 2798:2016 (E) 4 Table 1 Test methods Line Column 1 2 3 Properties Units Requirements 1 Hardness IRHD 80 45 2 3 Density Mg/m3 a 4 5 Tensile strength MPa 11 min. 6 7 Elongation at break % 120 min. 8 9 Modulus at % strain MPa 10 11 Tear strength N/mm 12 13 Resistance to low temperatures

17、 TR10 C 12 max. 14 Crystallization Point 15 Compression set % 15.1 After 70 h to 200 C 25 max. 15.2 After h to 200 C 16 17 Ozone resistance Ozone concentration : ( ) pphm Elongation of test piece : % Time : h Temperature : C 18 19 Corrosion and adhesion on metals in a dry atmosphere Time : 168 h Tem

18、perature : 200 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 : % 30 39 See Clause 4. a The value determined for each batch shall not differ from that determined at qualification by more than 0,03 Mg/m3

19、. prEN 2798:2016 (E) 5 Table 2 Tests after exposure to test media Line Column 1 2 3 4 5 1 Test media Air Liquid B, see ISO 1817 Fluid 101, see ISO 1817 2 Conditions of exposure in test media Units 70 h/250 C 70 h/23 C 70 h/200 C 3 Permitted variation of the properties compared to the initial value Volume % 010 015 4 Mass % 5 max. 5 Tensile strength % 20 max. 6 Elongation at break % 20 max. 7 Hardness IRHD 5 5 150 See Clause 4. 5 Designation EXAMPLE Description block RUBBER Identity block EN2798 Number of this standard 6 Technical specification See EN 3207.

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