EN 2744:1992

Overview

EN 2744:1992 - Aerospace series: Non metallic materials - Preferred test temperatures is a CEN standard that defines the preferred test temperatures to be used when testing non‑metallic aerospace materials such as rubber, plastics and polymeric composites. The standard’s purpose is to improve reproducibility and comparability of test results across laboratories, manufacturers and regulatory assessments in the aerospace sector. EN 2744 has been adopted nationally (for example as SIST EN 2744:2001).

Key Topics

• Scope and applicability - identifies which classes of non‑metallic materials are covered and the contexts in which preferred temperatures should be applied.
• Preferred test temperatures - provides a set of reference temperatures to be used for conditioning and testing non‑metallic materials to ensure consistency (standard lists specific values; consult the published standard for exact figures).
• Conditioning and equilibration - guidance on material conditioning periods and environmental control to reach the preferred test temperature before measurement.
• Test reporting - requirements for documenting the temperature conditions, specimen preparation and any deviations from preferred temperatures so results are traceable and comparable.
• Rationale for temperature selection - explains why consistent temperature selection matters for mechanical, thermal and electrical properties of rubber and plastics used in aerospace applications.

Applications

Who uses EN 2744:1992 and why:

• Material testing laboratories - to standardize test environments and ensure inter‑laboratory comparability of mechanical, thermal and electrical test data for non‑metallics.
• Aerospace manufacturers and suppliers - for incoming inspection, qualification testing and quality assurance of polymer parts, seals, hoses and composite components.
• Design and reliability engineers - to understand temperature‑dependent behavior and select materials with appropriate performance margins under defined thermal conditions.
• Procurement and certification bodies - to define contract test conditions and ensure delivered materials meet specified performance at agreed temperatures. Practical benefits include improved repeatability of test data, clearer product specifications, and reduced risk of thermal‑related performance failures in service.

Related Standards

• Other EN standards covering non‑metallic material test methods and specimen preparation
• International standards such as relevant ISO and ASTM test method documents for polymers, elastomers and composites (Consult the published EN 2744 and national adoption documents for precise cross‑references.)

Keywords: EN 2744:1992, preferred test temperatures, non‑metallic materials, aerospace, rubber and plastics, material testing, test temperature selection, conditioning, quality assurance.