ISO 3387:2020 PDF

Scope: This document specifies a test based on hardness measurements for determining the progressive stiffening of rubber with time, caused by crystallization. It is limited to materials having an initial hardness at a test temperature of from 10 IRHD to 85 IRHD. The method is applicable to raw, unvulcanized (compounded) and vulcanized rubber. It is mainly of interest for rubber with a marked crystallization tendency at temperatures experienced in cold climates, such as chloroprene and natural rubber. The method is not applicable to fast-crystallizing materials which crystallize to a considerable degree within the timespan of 15 min used for conditioning at test temperature.

ISO 3387:2020 Referenced Document

ISO 18899:2013 Rubber - Guide to the calibration of test equipment
ISO 23529 Rubber - General procedures for preparing and conditioning test pieces for physical test methods
ISO 48-2:2018 Rubber, vulcanized or thermoplastic - Determination of hardness - Part 2: Hardness between 10 IRHD and 100 IRHD

2020 ISO 3387:2020 Rubber — Determination of crystallization effects by hardness measurements
2012 ISO 3387:2012 Rubber - Determination of crystallization effects by hardness measurements
2000 ISO 3387:1994/Cor 1:2000 Rubber - Determination of crystallization effects by hardness measurements; Technical Corrigendum 1
1994 ISO 3387:1994 Rubber - Determination of crystallization effects by hardness measurements
1978 ISO 3387:1978 Rubbers; Determination of crystallization effects by hardness measurements