CEN - EN ISO 4545-3
Metallic materials - Knoop hardness test - Part 3: Calibration of reference blocks
|Publication Date:||1 March 2018|
|ICS Code (Mechanical testing of metals):||77.040.10|
|ICS Code (Mechanical testing):||19.060|
This document specifies the method for the calibration of reference blocks to be used for the indirect verification of Knoop hardness testing machines as specified in ISO 4545‑2.
The method is applicable only for indentations with long diagonals ≥0,020 mm.