International Organization for Standardization (ISO)
Latest
ISO 2039-2:1987
Scope
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.
ISO 2039-2:1987 history
1987ISO 2039-2:1987 Plastics; Determination of hardness; Part 2 : Rockwell hardness
1981ISO 2039-2:1981 Plastics — Determination of hardness by the ball indentation method — Part 2: Rockwell hardness