ISO 2472-1975 PDF

Full title and description

St ISO 2472-1975 — Ebonite — Determination of tensile strength and elongation at break. This short international standard specifies a method for measuring the tensile strength and the elongation at break of ebonite (hard rubber) test specimens under defined conditions, providing a simple, repeatable test procedure for quality control and material comparison.

Abstract

This standard defines the test specimen preparation and the tensile-test procedure used to determine two key mechanical properties of ebonite: tensile strength (maximum stress at break) and elongation at break (strain at fracture). The method is intended for routine laboratory evaluation and comparison of batches or formulations of ebonite and is deliberately concise (original publication is two pages). The procedure is suitable for use in specification text and material data sheets.

General information

• Status: Withdrawn / no longer active as an ISO international standard.
• Publication date: December 1975 (Edition 2, 1975).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 83.080.10 — Thermosetting materials (tests and physical properties).
• Edition / version: Edition 2 (1975).
• Number of pages: 2 pages (concise method sheet).

Scope

The scope covers the determination of tensile strength and elongation at break of ebonite test specimens prepared and tested under specified conditions. The standard applies to ebonite materials where these two mechanical properties are relevant to performance or acceptance criteria and where a simple tensile test is appropriate for quality control, formulation comparisons and verification of conformity to material requirements.

Key topics and requirements

• Definition of specimen shape and dimensions for tensile testing of ebonite.
• Test speed (crosshead displacement rate) and conditioning/environmental requirements before testing.
• Calculations and reporting of tensile strength (MPa or N/mm²) and elongation at break (percentage).
• Requirements for repeatability and number of specimens to be tested to obtain representative results.
• Notes on limitations: intended for ebonite (hard vulcanized rubber) and may not be appropriate for highly filled or specially modified rubbers without prior verification.

Typical use and users

Used by materials laboratories, quality control departments, rubber compounders and manufacturers of ebonite products (insulators, electrodes, mechanical parts) to verify mechanical performance and batch consistency. Also useful to standards committees and test laboratories preparing comparative data or converting historical specifications that reference ISO 2472:1975.

Related standards

Other ISO and national test methods for rubber and thermosetting materials (tensile tests, hardness, deflection, ageing) are commonly used alongside ISO 2472 for broader characterization. Relevant committees include ISO/TC 45 (rubber and rubber products) and its subcommittees on testing and analysis; subsequent or alternative ISO test methods for rubber mechanical properties may supersede or complement the method in ISO 2472.

Keywords

Ebonite; hard rubber; tensile strength; elongation at break; mechanical testing; ISO 2472:1975; thermosetting materials; quality control; ISO/TC 45.

FAQ

Q: What is this standard?

A: ISO 2472:1975 is an international standard titled "Ebonite — Determination of tensile strength and elongation at break" that specifies a concise tensile-test procedure for ebonite materials.

Q: What does it cover?

A: It covers specimen form, test conditions (speed and conditioning), calculation and reporting of tensile strength and elongation at break for ebonite, intended for routine laboratory and quality-control use.

Q: Who typically uses it?

A: Materials testing laboratories, rubber product manufacturers, compounders and standards committees working with ebonite or historical specifications that reference this ISO method.

Q: Is it current or superseded?

A: The standard has been withdrawn (it is no longer an active ISO standard). National catalogues and standards sellers show it withdrawn and indicate withdrawal/retirement from active use; users should consult more recent ISO or national test methods for current practice.

Q: Is it part of a series?

A: ISO 2472 is a standalone test method within the body of ISO standards addressing thermosetting materials and rubber testing; it was prepared under ISO/TC 45/SC 2 (testing and analysis). It is not part of a numbered multipart series but relates thematically to other ISO test methods for rubber and thermosetting plastics.

Q: What are the key keywords?

A: Ebonite; hard rubber; tensile test; elongation at break; mechanical properties; ISO 2472; thermosetting materials; test method.