EN 3697:2013
(Main)Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Low temperature resistant - Hardness 60 IRHD
Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Low temperature resistant - Hardness 60 IRHD
This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) ), low temperature resistant, hardness 60 IRHD, for aerospace applications.
Luft- und Raumfahrt - Acrylinitril-Butadien-Elastomer (NBR) - Beständig gegen niedrige Temperaturen - Härte 60 IRHD
Diese Norm legt die Eigenschaften von Acrylnitril-Butadien-Kautschuk (NBR) ), beständig gegen niedrige Temperaturen, Härte 60 IRHD, zur Anwendung in der Luft- und Raumfahrt fest.
Série aérospatiale - Élastomère acrylonitrile butadiène (NBR) - Résistant aux basses températures - Dureté 60 DIDC
Aeronavtika - Akrilonitril-butadien kavčuk (NBR) - Odporen proti nizkim temperaturam - Trdota 60 IRHD
General Information
Overview
EN 3697:2013 is a CEN (European) aerospace standard that defines the required properties for acrylonitrile-butadiene rubber (NBR) compounds specified as low temperature resistant with a nominal hardness of 60 IRHD. The standard targets NBR materials intended for aerospace applications where resistance to petroleum-based fuels and lubricants and performance at low temperatures are critical.
Key topics and technical requirements
- Material designation: Acrylonitrile-butadiene rubber (NBR), symbol per ISO 1629, aerospace series, hardness 60 IRHD.
- Temperature range: continuous service from −45 °C to 110 °C; intermittent service up to 130 °C.
- Low-temperature performance: TR10 (temperature of retraction) requirement ≤ −45 °C, ensuring embrittlement resistance at low ambient temperatures.
- Mechanical properties (selected, as specified in the standard):
- Tensile strength: minimum 11 MPa.
- Elongation at break: minimum 200%.
- Modulus at 100% strain: minimum 2.5 MPa.
- Compression set: after 24 h at 125 °C, ≤ 45%.
- Corrosion/adhesion on metals: e.g., 168 h at 100 °C - no corrosion, no adhesion.
- Testing and acceptance: EN 3697 references EN 3207 (rubber compounds - technical specification) and ISO 1817 (rubber - effect of liquids). Qualification requires the full test suite; batch acceptance requires the subset of tests marked for production control (e.g., hardness, density, tensile strength, elongation, selected compression-set tests). Density tolerances for batch acceptance are tightly controlled (difference from qualification ≤ 0.02 Mg/m3).
- Oils and fuels: Oil resistance is evaluated per ISO 1817 with specified exposure conditions (e.g., 70 h at 125 °C) and permitted variations in physical properties.
Applications and practical value
- Typical use: seals, gaskets, O-rings and other elastomer components in landing gear, fuel systems, hydraulic systems and environmental seals where both fuel/oil resistance and low-temperature flexibility are required.
- Benefits: ensures consistent, certified material performance across aerospace suppliers, simplifies material selection, and supports regulatory and procurement requirements for aircraft components.
Who uses this standard
- Aerospace material engineers, specification writers, quality assurance and procurement teams, rubber compounders, and manufacturers of elastomer components for aviation and space systems.
Related standards
- EN 3207 - Aerospace series: rubber compounds - technical specification
- ISO 1629 - Rubber and latices: nomenclature
- ISO 1817 - Rubber, vulcanized: determination of the effect of liquids
Keywords: EN 3697:2013, acrylonitrile-butadiene rubber, NBR, low temperature resistant, hardness 60 IRHD, aerospace standard, rubber compounds, oil resistance, TR10, EN 3207, ISO 1817.
Frequently Asked Questions
EN 3697:2013 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Low temperature resistant - Hardness 60 IRHD". This standard covers: This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) ), low temperature resistant, hardness 60 IRHD, for aerospace applications.
This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) ), low temperature resistant, hardness 60 IRHD, for aerospace applications.
EN 3697:2013 is classified under the following ICS (International Classification for Standards) categories: 49.025.40 - Rubber and plastics. The ICS classification helps identify the subject area and facilitates finding related standards.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.QL]NLPLuft- und Raumfahrt - Acrylinitril-Butadien-Elastomer (NBR) - Beständig gegen niedrige Temperaturen - Härte 60 IRHDSérie aérospatiale - Série aérospatiale - Élastomère acrylonitrile butadiène (NBR) - Résistant aux basses températures - Dureté 60 DIDCAerospace series - Acrylonitrile-butadiene rubber (NBR) - Low temperature resistant - Hardness 60 IRHD49.025.40Guma in polimerni materialiRubber and plasticsICS:Ta slovenski standard je istoveten z:EN 3697:2013SIST EN 3697:2014en01-februar-2014SIST EN 3697:2014SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3697
January 2013 ICS 49.025.40 English Version
Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Low temperature resistant - Hardness 60 IRHD
Série aérospatiale - Série aérospatiale - Élastomère acrylonitrile butadiène (NBR) - Résistant aux basses températures - Dureté 60 DIDC
Luft- und Raumfahrt - Acrylinitril-Butadien-Elastomer (NBR) - Beständig gegen niedrige Temperaturen - Härte 60 IRHDThis European Standard was approved by CEN on 21 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 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 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, 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 United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR 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 3697:2013: ESIST EN 3697:2014
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