EN 3826:2014
(Main)Aerospace series - Fluorosilicone rubber (FVMQ) - Hardness 70 IRHD
Aerospace series - Fluorosilicone rubber (FVMQ) - Hardness 70 IRHD
This European Standard specifies the properties of fluorosilicone rubber (FVMQ) ), hardness 70 IRHD, for aerospace applications.
Luft- und Raumfahrt - Fluorsilikon Elastomer (FVMQ) - Härte 70 IRHD
Série aérospatiale - Elastomère fluorosilicone (FVMQ) - Dureté 70 DIDC
Aeronavtika - Fluorosilikonska guma (FVMQ) - Trdota 70 IRHD
Ta evropski standard določa lastnosti fluorosilikonske gume (FVMQ)1), trdota 70 IRHD, za uporabo v aeronavtiki.
General Information
- Status
- Published
- Publication Date
- 16-Dec-2014
- Withdrawal Date
- 29-Jun-2015
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 4 - Metallic
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 21-Jan-2025
- Completion Date
- 11-Feb-2026
Relations
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
Overview
EN 3826:2014 is a CEN European Standard that specifies the required properties of fluorosilicone rubber (FVMQ) with a hardness of 70 IRHD for aerospace applications. The standard defines material performance requirements, typical uses, test methods and acceptance criteria so that FVMQ components used in aircraft and space systems meet consistent, reproducible performance levels.
Key topics and technical requirements
- Material and scope: Applies to fluorosilicone elastomer (FVMQ) at 70 IRHD intended for aerospace service.
- Temperature range: Continuous service −55 °C to 180 °C; intermittent service −55 °C to 200 °C.
- Mechanical properties (examples from the standard):
- Hardness: 70 IRHD (specified).
- Tensile strength: minimum 5 MPa (qualification requirement).
- Elongation at break: minimum 120%.
- Compression set: after 70 h at 150 °C, ≤ 25%.
- Low-temperature performance: TR10 ≤ −55 °C.
- Aging and fluid resistance: Specifies tests after exposure to air and representative fluids (per ISO 1817) with permitted changes in volume, tensile strength and elongation to assess compatibility with aviation fuels, hydraulic fluids, lubricants, greases, silicone oil and certain ester-based fluids (excluding phosphate esters).
- Batch acceptance vs qualification: For qualification, the full battery of tests is required. For batch acceptance, a defined subset of tests (marked in the standard) is applied.
- Dimensional and density control: Density per batch must not differ from qualification by more than 0.02 Mg/m3.
- Normative references and test methods: Includes ISO 1629 (nomenclature), ISO 1817 (effect of liquids), and EN 3207 (rubber compound technical specification).
Applications and users
- Typical uses include O-rings, seals, gaskets and other elastomeric parts exposed to petroleum-based fluids and high/low temperatures in aircraft and spacecraft systems.
- Primary users:
- Aerospace OEMs and tier‑1 suppliers specifying elastomeric seals.
- Materials and sealing engineers selecting FVMQ for fuel, hydraulic or lubricant compatibility.
- Qualification and test laboratories performing batch acceptance and qualification testing.
- Procurement and certification teams ensuring supplier conformity with EN 3826:2014.
Related standards
- ISO 1629 - Rubber and latices - Nomenclature
- ISO 1817 - Determination of the effect of liquids on vulcanized rubber
- EN 3207 - Aerospace series - Rubber compounds - Technical specification
EN 3826:2014 provides concise, standardized requirements for FVMQ (70 IRHD) used in aerospace environments, helping suppliers and manufacturers ensure consistent performance where fuel and fluid resistance plus wide temperature capability are essential.
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Frequently Asked Questions
EN 3826:2014 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Fluorosilicone rubber (FVMQ) - Hardness 70 IRHD". This standard covers: This European Standard specifies the properties of fluorosilicone rubber (FVMQ) ), hardness 70 IRHD, for aerospace applications.
This European Standard specifies the properties of fluorosilicone rubber (FVMQ) ), hardness 70 IRHD, for aerospace applications.
EN 3826:2014 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.
EN 3826:2014 has the following relationships with other standards: It is inter standard links to ISO 1817:2011, ISO 1629:2013, EN 3207:1998. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3826:2014 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aeronavtika - Fluorosilikonska guma (FVMQ) -
Trdota 70 IRHDLuft- und Raumfahrt - Fluorsilikon Elastomer (FVMQ) - Härte 70 IRHDSérie aérospatiale - Elastomère fluorosilicone (FVMQ) - Dureté 70 DIDCAerospace series - Fluorosilicone rubber (FVMQ) - Hardness 70 IRHD49.025.40Guma in polimerni materialiRubber and plasticsICS:Ta slovenski standard je istoveten z:EN 3826:2014SIST EN 3826:2015en,fr,de01-marec-2015SIST EN 3826:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3826
December 2014 ICS 49.025.40 English Version
Aerospace series - Fluorosilicone rubber (FVMQ) - Hardness 70 IRHD
Série aérospatiale - Elastomère fluorosilicone (FVMQ) - Dureté 70 DIDC
Luft- und Raumfahrt - Fluorsilikon Elastomer (FVMQ) - Härte 70 IRHD This European Standard was approved by CEN on 21 June 2014.
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
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3826:2014 ESIST EN 3826:2015
Page Foreword .3 1 Scope .4 2 Normative references .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
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