Aerospace series - Silicone rubber (VMQ) - Hardness 50 IRHD

This standard specifies the properties of silicone rubber (VMQ), hardness 50 IRHD, for aerospace aplications.

Luft- und Raumfahrt - Silicon-Elastomer (VMQ) - Härte 50 IRHD

Diese Norm legt die Eigenschaften von Silicon-Elastomer (VMQ), Härte 50 IRHD, für die Anwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Elastomere silicone (VMQ) - Dureté 50 DIDC

La présente norme définit les caractéristiques des élastomères silicone (VMQ), dureté 50 DIDC, pour applications aérospatiales.

Aerospace series - Silicone rubber (VMQ) - Hardness 50 IRHD

General Information

Status
Published
Publication Date
31-Dec-2000
ICS
49.025.40 - Rubber and plastics
Technical Committee
SS SPL - Technical Board for the general field
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jan-2001
Due Date
01-Jan-2001
Completion Date
01-Jan-2001
Ref Project
EN 2259:1995 - Aerospace series - Silicone rubber (VMQ) - Hardness 50 IRHD

Overview

EN 2259:1995 is a CEN aerospace series standard that specifies the properties of silicone rubber (VMQ) with a declared hardness of 50 IRHD for aerospace applications. Adopted in national variants (for example SIST EN 2259:2001 in Slovenia), this standard sits in the rubber and plastics classification (ICS 49.025.40) and provides a materials baseline for components where silicone elastomers are used in aircraft and spacecraft systems.

Key Topics

While the full text contains the exact requirements, standards like EN 2259 (Silicone rubber VMQ - Hardness 50 IRHD) typically address the following technical areas:

  • Material designation and scope - definition of VMQ silicone rubber and intended aerospace uses.
  • Declared hardness - specification of 50 IRHD as the reference hardness for the material.
  • Physical and mechanical properties - baseline properties that suppliers must meet (tensile, elongation, compression set, density) as applicable to aerospace qualifications.
  • Environmental performance - expected behaviour under temperature extremes, ozone, UV, and aging relevant to aerospace service conditions.
  • Chemical compatibility - guidance on resistance to fuels, hydraulic fluids, lubricants and common aerospace chemicals.
  • Test methods and inspection - reference to standardized test procedures (hardness measurement by IRHD, sampling, acceptance criteria).
  • Marking, traceability and documentation - batch identification, certificate of conformity and quality assurance information required for procurement.
  • Packaging and storage - recommendations to preserve material properties before installation.

Applications

EN 2259 is focused on aerospace applications where silicone rubber VMQ at 50 IRHD is preferred for:

  • Seals, gaskets and O-rings in environmental control, fuel, and hydraulic systems
  • Vibration isolators and cushioning elements
  • Wire and cable insulators, boots and protective bellows
  • Components requiring wide temperature capability and good aging resistance

Who uses this standard:

  • Aerospace materials engineers and designers specifying elastomers
  • Manufacturers and suppliers of silicone rubber components
  • Quality, procurement and certification teams requiring conformity evidence
  • Maintenance, repair and overhaul (MRO) organizations selecting replacement parts

Related Standards

Related guidance often referenced with EN 2259 includes other EN/ISO test standards for elastomers (for IRHD hardness measurement, compression set, tensile testing) and aerospace materials procurement standards. When specifying components, cross-reference current EN and ISO test methods to ensure consistent acceptance criteria.

Keywords: EN 2259, silicone rubber VMQ, hardness 50 IRHD, aerospace standard, material properties, IRHD hardness, rubber and plastics.

Frequently Asked Questions

SIST EN 2259:2001 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Silicone rubber (VMQ) - Hardness 50 IRHD". This standard covers: This standard specifies the properties of silicone rubber (VMQ), hardness 50 IRHD, for aerospace aplications.

This standard specifies the properties of silicone rubber (VMQ), hardness 50 IRHD, for aerospace aplications.

SIST EN 2259:2001 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.

SIST EN 2259:2001 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.Aerospace series - Silicone rubber (VMQ) - Hardness 50 IRHDLuft- und Raumfahrt - Silicon-Elastomer (VMQ) - Härte 50 IRHDSérie aérospatiale - Elastomere silicone (VMQ) - Dureté 50 DIDCAerospace series - Silicone rubber
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