SIST EN 2845:2014
(Main)Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Fuel and synthetic oil resistant - Hardness 50 IRHD
Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Fuel and synthetic oil resistant - Hardness 50 IRHD
This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) ), fuel and synthetic oil resistant, hardness 50 IRHD, for aerospace applications.
Luft- und Raumfahrt - Brennstoff und synthetisches Öl resistente acrylonitrile-butadien Elastomere (NBR) - Härte 50 - Eigenschaften
Diese Norm legt die Eigenschaften von Acrylnitril-Butadien-Kautschuk (NBR) ), beständig gegen Brennstoffe und synthetische Öle, Härte 50 IRHD, zur Anwendung in der Luft- und Raumfahrt fest.
Caoutchouc acrylonitrile-butadiène résistant à l'huile synthétique et au combustible (NBR) - Degré de dureté 50 - Caractéristiques
La présente Norme européenne spécifie les caractéristiques de l’élastomère acrylonitrile butadiène (NBR), résistant aux carburants et aux huiles synthétiques, dureté 50 DIDC, pour les applications aérospatiales.
Aeronavtika - Akrilonitril-butadien kavčuk (NBR) - Odporen proti gorivom in sintetičnim oljem - Trdota 50 IRHD
General Information
Overview
EN 2845:2013 is a European aerospace series standard that specifies the required properties of acrylonitrile-butadiene rubber (NBR) that is resistant to petroleum-based fuels and diester-based synthetic oils. The standard targets NBR with a nominal hardness of 50 IRHD for use in aerospace seals and components. It was prepared under ASD-STAN and approved by CEN in November 2012.
Key practical points from the standard:
- Material: acrylonitrile-butadiene rubber (NBR)
- Resistance: petroleum fuels and synthetic (diester) oils
- Nominal hardness: 50 IRHD
- Typical aerospace application: seals, gaskets and elastomeric components
Key Topics
Properties and test requirements
- Hardness: specified as 50 IRHD (standard test specimens are referenced)
- Mechanical: tensile strength and elongation requirements are specified (tensile strength ≥ 10 MPa; elongation at break ≥ 400% as indicated in the standard tables)
- Low temperature behaviour: TR10 requirement (example value given in the standard is −25 °C max.)
- Compression set: limits for elevated temperature exposures (e.g. 24 h at 125 °C ≤ 35%; 70 h at 125 °C ≤ 40%)
- Corrosion and adhesion: tested on metals (no corrosion and no adhesion after specified conditioning such as 168 h at 100 °C)
Testing framework and acceptance
- Qualification testing is performed on standard test specimens; batch acceptance testing uses a subset of tests (noted in the standard tables)
- Test methods are linked to EN 3207 (rubber compounds technical specification) and ISO 1817 (effect of liquids)
- Density control: batch density must not differ from the qualification value by more than 0.02 Mg/m3
Applications
EN 2845:2013 is intended to guide material selection, procurement and quality control for aerospace elastomeric parts where fuel and synthetic oil resistance is required. Typical applications include:
- Dynamic and static seals in fuel systems
- Gaskets and O-rings exposed to petroleum fuels or diester lubricant environments
- Elastomeric interfaces and components requiring defined temperature limits and durability
Practical benefits for engineers and procurement teams:
- Clear, standardized acceptance criteria for batch testing
- Consistent specification language for contracts and design documents
- Confidence in material compatibility and service temperature ranges (continuous: −40 °C to 120 °C; intermittent: −40 °C to 150 °C)
Related Standards
- EN 3207 - Aerospace series: Rubber compounds - Technical specification (referenced for property tables and technical specification)
- ISO 1817 - Determination of the effect of liquids on rubber (used for fluid exposure testing)
- ISO 1629 - Nomenclature for rubber types (symbol and identity of NBR)
For manufacturers and specifiers, EN 2845:2013 should be used together with EN 3207 and ISO 1817 to define qualification and batch acceptance test programs, and to ensure that NBR components meet aerospace fuel and oil resistance expectations.
Frequently Asked Questions
SIST EN 2845:2014 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Fuel and synthetic oil resistant - Hardness 50 IRHD". This standard covers: This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) ), fuel and synthetic oil resistant, hardness 50 IRHD, for aerospace applications.
This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) ), fuel and synthetic oil resistant, hardness 50 IRHD, for aerospace applications.
SIST EN 2845:2014 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.Luft- und Raumfahrt - Brennstoff und synthetisches Öl resistente acrylonitrile-butadien Elastomere (NBR) - Härte 50 - EigenschaftenCaoutchouc acrylonitrile-butadiène résistant à l'huile synthétique et au combustible (NBR) - Degré de dureté 50 - CaractéristiquesAerospace series - Acrylonitrile-butadiene rubber (NBR) - Fuel and synthetic oil resistant - Hardness 50 IRHD49.025.40Guma in polimerni materialiRubber and plasticsICS:Ta slovenski standard je istoveten z:EN 2845:2013SIST EN 2845:2014en01-februar-2014SIST EN 2845:2014SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2845
February 2013 ICS 49.025.40 English Version
Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Fuel and synthetic oil resistant - Hardness 50 IRHD
Série aérospatiale - Élastomère acrylonitrile butadiène (NBR) - Résistant aux carburants et aux huiles synthétiques - Dureté 50 DIDC
Luft- und Raumfahrt - Acrylinitril-Butadien-Elastomer (NBR) - Beständig gegen Brennstoffe und synthetische Öle - Härte 50 IRHD This European 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 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 2845:2013: ESIST EN 2845:2014
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