ISO 2039-2:1987

Plastics — Determination of hardness — Part 2: Rockwell hardness

Датум објављивања: 2. 7. 1987.

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Тренутна фаза: 90.92 Effective date: 20. 11. 2024.

Иницијатор: ISO

Припада: ISO/TC 61/SC 2

Врста: Међународни стандард

ICS: 83.080.01

Језик: француски енглески

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Статус: Објављен

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Specifications of a method for the determination of the indentation hardness of plastics by means of the Rockwell hardness tester using the Rockwell M, L and R hardness scales. The Rockwell hardness number is derived from the net increase in depth of impression as the load on an indentor is increased from a fixed minor load to a major load and then returned to the same minor load. For materials having high creep and recovery, the time-factors involved in application of the major and minor loads have a considerable effect on the results of the measurements.