This part of ISO 6506 specifies a method for the calibration of reference blocks which are intended for use in the indirect verification of Brinell hardness testing machines as described in ISO 6506-2.
DS/EN ISO 6506-3:2006 history
2006DS/EN ISO 6506-3:2006 Metallic materials - Brinell hardness test - Part 3: Calibration of reference blocks