ISO 2474-1972 rus PDF

Full title and description

ISO 2474:1972 — Ebonite — Determination of crushing strength. This International Standard specifies a method for measuring the axial compressive stress required to crush a cylindrical specimen of ebonite (hard vulcanized rubber).

Abstract

This short standard (edition 1, 1972) defines the apparatus, specimen form and dimensions, conditioning and test procedure used to determine the crushing (compressive) strength of ebonite specimens. The method includes requirements on the number of specimens, timing between vulcanization and test and the reporting of results. The published document is 2 pages in length.

General information

• Status: Withdrawn (listed as Withdrawn by ISO).
• Publication date: August 1972 (Edition 1, 1972-08).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 83.080 — Plastics / hard rubber materials.
• Edition / version: Edition 1 (1972).
• Number of pages: 2 pages.

Scope

Specifies a standardized compression test procedure to determine the crushing strength of ebonite (hard vulcanized sulfur-cured rubber). The standard covers specimen preparation (cylindrical specimens), required number of test specimens (three), minimum and maximum intervals between vulcanization and testing for comparable measurements (minimum 16 hours; for specimens from raw products a maximum of four weeks is indicated), the test method and requirements for reporting results.

Key topics and requirements

• Definition of ebonite (hard vulcanized rubber) and compression (crushing) strength concept.
• Specimen geometry and number of specimens (cylindrical specimens; three specimens recommended).
• Conditioning: minimum delay after vulcanization before testing (16 hours) and guidance on maximum delay for raw-product specimens (up to 4 weeks).
• Test equipment and procedure to apply axial compressive load and record crushing strength.
• Result reporting and calculation of compressive stress (force per unit cross-sectional area).

Typical use and users

Used by materials testing laboratories, quality control personnel in manufacturers of hard rubber/ebonite products, R&D teams working on vulcanized rubber formulations, and standards/development organizations that compare mechanical properties of elastomeric and hard-rubber materials. It is a short test method referenced where compressive failure characteristics of ebonite need to be known or compared.

Related standards

Related plastics and rubber test standards covering physical and mechanical properties, and other ISO test methods for similar materials. National and regional standards bodies' catalogs note related ISO test methods (for example, other ISO standards listed in plastics testing collections and vendor catalogs).

Keywords

ebonite, hard rubber, vulcanized rubber, crushing strength, compression test, compressive strength, specimen conditioning, ISO 2474, plastics testing.

FAQ

Q: What is this standard?

A: ISO 2474:1972 is an International Standard that specified a method for determining the crushing (compressive) strength of ebonite (hard vulcanized rubber).

Q: What does it cover?

A: It covers specimen form and dimensions (cylindrical specimens), number of specimens, conditioning times after vulcanization, the compression test procedure, and result reporting for the crushing strength of ebonite.

Q: Who typically uses it?

A: Materials testing laboratories, quality control and production engineers in manufacturers of ebonite/hard-rubber products, and researchers comparing mechanical properties of vulcanized rubber formulations.

Q: Is it current or superseded?

A: The standard is listed by ISO as Withdrawn. National catalog records also indicate withdrawal (for example, some national listings show the standard withdrawn from national catalogs in the 1990s). Users should check current ISO catalogs or national standards bodies for any replacement or newer methods before relying on this 1972 procedure.

Q: Is it part of a series?

A: It is one of many ISO test methods addressing plastics, rubbers and related materials (ICS 83.080). While not part of a numbered "series" in its title, it sits among other ISO physical-test standards for plastics and vulcanized materials.

Q: What are the key keywords?

A: Ebonite; hard rubber; crushing strength; compressive test; vulcanization; specimen conditioning; ISO 2474.