SIST EN 2845:2014

• Abstract:

  This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) ), fuel and synthetic oil resistant, hardness 50 IRHD, for aerospace applications.

• Status: Published
• Publication Date: 09-Jan-2014
• ICS: 49.025.40 - Rubber and plastics
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 03-Jan-2014
• Due Date: 10-Mar-2014
• Completion Date: 10-Jan-2014
• Ref Project: EN 2845:2013 - Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Fuel and synthetic oil resistant - Hardness 50 IRHD

• Refers: SIST EN 1817:2020 - Resilient floor coverings - Specification for homogeneous and heterogeneous smooth rubber floor coverings
• Effective Date: 28-Jan-2026
• Refers: SIST EN 3207:2001 - Aerospace series - Rubber compounds - Technical specification
• Effective Date: 28-Jan-2026

SIST EN 2845:2014 is the Slovenian adoption of EN 2845:2013 from SIST. It specifies the properties of acrylonitrile-butadiene rubber (NBR) that is resistant to fuel and synthetic oil and has hardness 50 IRHD, for aerospace applications.

What does SIST EN 2845:2014 specify?

SIST EN 2845:2014 specifies the property set for one aerospace NBR material grade and how that material is checked. It also shows how the document is organized, from scope and references through application guidance, properties, designation and technical specification.

The document is arranged in six clauses:

• Clause 1 Scope
• Clause 2 Normative references
• Clause 3 Application of the material, with general guidance, typical use and temperature range
• Clause 4 Properties
• Clause 5 Designation
• Clause 6 Technical specification

The standard is written for a defined rubber compound family rather than for a finished part. In practice, that means the buyer or engineer uses it to specify the material, while the finished component still needs its own suitability checks.

What are the key requirements of SIST EN 2845:2014?

SIST EN 2845:2014 requires the material to be checked against the property list in Clause 4 and the test approach in Tables 1 and 2. The most important point for users is that the standard separates type qualification from routine batch acceptance, so the same compound is not necessarily tested in the same way every time.

Material use and service conditions

Clause 3 says the material is intended for applications that need resistance to petroleum-based fuels and diester-based lubricants. It also gives a service temperature range of -40 °C to 120 °C for continuous service and -40 °C to 150 °C for intermittent service. That tells designers whether the compound fits the thermal and fluid environment before they specify it.

Clause 3.1 says suitability for a specific finished product shall be confirmed by complementary tests on the finished product, because the listed properties come from standard test specimens. In practice, this means the material grade alone is not enough to approve a seal or other part.

Property checks

Clause 4 and Table 1 cover the core property set: hardness, density, tensile strength, elongation at break, low-temperature resistance, compression set, ozone resistance, and corrosion and adhesion on metals. These are the checks that show whether the compound has the expected mechanical behavior and environmental resistance for aerospace use.

Table 1 also marks which tests are used for batch acceptance. For suppliers, that means some properties are expected on every batch, while the full set is used for qualification. For buyers, it helps define what test evidence to ask for with deliveries.

Liquid resistance testing

Table 2 gives the liquid exposure tests used to assess resistance to air, Liquid B from ISO 1817, and Liquid No. 1 from ISO 1817. It sets the exposure media, the exposure conditions, and the permitted changes in volume, mass, tensile strength, elongation and hardness after exposure.

In practice, this is the part that confirms whether the NBR compound keeps its properties after contact with the specified fluids. That matters directly for fuel and synthetic oil service.

Identification and specification

Clause 5 gives the designation format and an example with the identity block EN2845. Clause 6 says the technical specification is in EN 3207. This lets procurement and quality teams name the material correctly and link it to the companion compound specification.

What terms does SIST EN 2845:2014 define?

• NBR - Acrylonitrile-butadiene rubber, the rubber family covered by this standard.
• IRHD - International Rubber Hardness Degree, the hardness scale used for the material grade.
• Qualification - The full test program used to establish that the material meets the standard.
• Batch acceptance - The subset of tests used to confirm a production batch before release.
• Continuous service - Service at the lower long-duration temperature range given in Clause 3.3.
• Intermittent service - Service at the higher short-duration temperature range given in Clause 3.3.
• Designation - The coded way of identifying the material in Clause 5.
• Technical specification - The detailed compound specification pointed to by Clause 6.

Who uses SIST EN 2845:2014?

SIST EN 2845:2014 is used by aerospace material engineers, component designers, quality managers, test laboratories, and procurement teams. They use it to specify a fuel- and oil-resistant NBR compound, plan qualification and batch acceptance testing, and compare supplier data against a common aerospace reference.

Manufacturers and suppliers use it to prepare technical data sheets and test reports for the compound. Buyers use it to state exactly what rubber grade they need when sourcing seals, elastomer parts or other aerospace applications.

What changed in SIST EN 2845:2014 from the previous edition?

SIST EN 2845:2014 is identical to EN 2845:2013. The document is the Slovenian national standard adoption of that European Standard.

Which standards are used with SIST EN 2845:2014?

• EN 3207 - The normative reference for rubber compounds technical specification; Clause 6 points to it for the technical specification.
• ISO 1817 - The normative reference used for the liquid exposure tests in Table 2, which measure the effect of liquids on vulcanized or thermoplastic rubber.
• ISO 1629 - Cited in the bibliography for rubber and latices nomenclature, which supports the NBR symbol used in the standard.

What does the SIST EN 2845:2014 document contain?

SIST EN 2845:2014 contains two technical tables and a short set of clauses that define how the material is described and checked. Table 1 sets out the properties, units, test methods and acceptance notes. Table 2 gives the liquid-resistance test media, exposure conditions and allowable property changes after immersion.

The document also includes a designation example in Clause 5, which helps users write the material name correctly in drawings and purchase documents. Clause 6 links the grade to EN 3207, and the bibliography points to ISO 1629 for rubber nomenclature.

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
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Management Centre:
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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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