SIST EN 2835:2012

Aerospace series - Chloroprene rubber (CR) - Heat resistance - Hardness 40 IRHD

This European Standard specifies the properties of chloroprene rubber (CR)  ) heat resistant, hardness 40 IRHD, for aerospace applications.

Luft- und Raumfahrt - Chloropren-Elastomer (CR) - Wärmebeständig - Härte 40 IRHD

Diese Europäische Norm legt Eigenschaften von Chloropren-Elastomer (CR) ) wärmebeständig, Härte 40 IRHD, zur Anwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Élastomère chloroprène (CR) - Résistant à la chaleur - Dureté 40 DIDC

La présente Norme européenne spécifie les caractéristiques de l’élastomère chloroprène (CR)  ) résistant à la chaleur, dureté 40 DIDC, pour les applications aérospatiales.

Aeronavtika - Kloroprenska guma - Toplotno odporna - Trdota 40 IRHD

Ta evropski standard določa lastnosti toplotno odporne kloroprenske gume (CR) s trdoto 40 IRHD za uporabo v aeronavtiki.

General Information

• Status: Published
• Publication Date: 16-Jul-2012
• ICS: 49.025.40 - Rubber and plastics
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 05-Jul-2012
• Due Date: 09-Sep-2012
• Completion Date: 17-Jul-2012
• Ref Project: EN 2835:2012 - Aerospace series - Chloroprene rubber (CR) - Heat resistance - Hardness 40 IRHD

Overview

SIST EN 2835:2012 is a European Standard developed by CEN that specifies the key properties of heat-resistant chloroprene rubber (CR) with a hardness of 40 IRHD, tailored specifically for aerospace applications. This standard ensures that chloroprene rubber materials used in the aerospace industry meet stringent requirements for durability, heat resistance, and mechanical performance, which are critical for reliable operation in demanding environments.

Chloroprene rubber (CR), known for its excellent resistance to atmospheric aging, ozone attack, and moderate resistance to petroleum-based fuels and lubricants, is widely employed in aerospace for sealing, insulation, and protective components. SIST EN 2835:2012 establishes test methods and property thresholds to guarantee consistent quality and performance.

Key Topics

• Material Specification
  The standard identifies chloroprene rubber (CR) hardness at 40 IRHD with optimized heat-resistant properties suitable for aerospace use.

• Mechanical and Physical Properties
  Required characteristics include:

  • Hardness: 40 ± 5 IRHD
  • Tensile strength: minimum 11 MPa
  • Elongation at break: minimum 500%
  • Compression set: maximum 40% after 24 hours at 125 °C
  • Tear strength and density parameters per technical specifications
  • Resistance to low temperatures (minimum -40 °C continuous service)
  • Ozone resistance without cracking at 30 °C for 70 hours

• Temperature Range for Service

  • Continuous: -40 °C to 120 °C
  • Intermittent: -40 °C to 150 °C

• Testing Procedures
  The standard references testing methods from EN 3207 and ISO 1817 to evaluate rubber's resistance to liquids, environmental conditions, and mechanical stress to ensure batch acceptance and qualification.

• Application Suitability
  EN 2835 emphasizes that suitability for specific aerospace applications must be confirmed through complementary testing on finished products, as standardized tests are based on specimen samples.

Applications

• Aerospace Components
  CR materials complying with SIST EN 2835:2012 are ideal for seals, gaskets, hoses, and other components requiring heat resistance and elasticity in aircraft engines, fuel systems, and environmental control systems.

• Fuel and Lubricant Exposure
  The material's moderate resistance to petroleum-based fuels and lubricants enables it to perform reliably in contact with these substances without degradation.

• Environmental Durability
  Due to excellent resistance to ozone and atmospheric aging, chloroprene rubber of this standard is suitable for external and internal aerospace components exposed to varying pressures, temperatures, and atmospheric conditions.

• Temperature Extremes
  Components manufactured to EN 2835 withstand temperature extremes typically encountered in aerospace operations, ensuring structural integrity and performance under continuous and intermittent thermal stress.

Related Standards

• EN 3207: Aerospace series - Rubber compounds - Technical specification
  Provides detailed technical parameters and test methods referenced in EN 2835 for material qualification and batch acceptance.

• ISO 1629: Rubber and latices - Nomenclature
  Defines symbols and naming conventions for rubbers including chloroprene rubber (CR).

• ISO 1817: Rubber, vulcanized or thermoplastic - Determination of the effect of liquids
  Specifies standardized methods for testing rubber’s resistance to various liquids, referenced for exposure testing in EN 2835.

Summary

SIST EN 2835:2012 serves as a vital standard in the aerospace sector by defining the stringent requirements for heat-resistant chloroprene rubber with 40 IRHD hardness. It ensures material consistency and reliability for components subjected to mechanical stress, temperature fluctuations, and environmental exposure. Compliance with this standard supports manufacturing high-performance aerospace parts that meet safety and durability expectations, making it a benchmark for material quality in aerospace elastomers.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aeronavtika - Kloroprenska guma - Toplotno odporna - Trdota 40 IRHDLuft- und Raumfahrt - Chloropren-Elastomer (CR) - Wärmebeständig - Härte 40 IRHDSérie aérospatiale - Élastomère chloroprène (CR) - Résistant à la chaleur - Dureté 40 DIDCAerospace series - Chloroprene rubber (CR) - Heat resistance - Hardness 40 IRHD49.025.40Guma in polimerni materialiRubber and plasticsICS:Ta slovenski standard je istoveten z:EN 2835:2012SIST EN 2835:2012en,fr,de01-september-2012SIST EN 2835:2012SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2835
March 2012 ICS 49.025.40 English Version
Aerospace series - Chloroprene rubber (CR) - Heat resistance -Hardness 40 IRHD
Série aérospatiale - Élastomère chloroprène (CR) - Résistant à la chaleur - Dureté 40 DIDC
Luft- und Raumfahrt - Chloropren-Elastomer (CR) - Wärmebeständig - Härte 40 IRHD This European Standard was approved by CEN on 21 January 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, 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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B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2835:2012: ESIST EN 2835:2012
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