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ISO 844:2026

Rigid cellular plastics — Determination of compressive properties

Jun 24, 2026

General information

60.60     Jun 24, 2026

ISO

ISO/TC 61/SC 10

International Standard

83.100  

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Scope

This document specifies methods for determining the compressive strength, the corresponding compressive strain, the compressive stress at 10 % nominal compressive strain, and the compressive modulus of rigid cellular plastics.
Two procedures are specified. Procedure A and Procedure B.
Procedure A utilizes the compression plate displacement for the nominal property determination. It is used to determine:

compressive strength and the corresponding nominal compressive strain;
compressive stress at 10 % nominal compressive strain;
nominal compressive modulus.

Procedure B uses an extensometer and determines the conventional properties. It is used to determine:

compressive strength and the corresponding compressive strain;
compressive modulus.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 844:2021

NOW

PUBLISHED
ISO 844:2026
60.60 Standard published
Jun 24, 2026