ISO 6506-3 is the ISO standard that specifies a method for calibrating the reference blocks used in the indirect verification of Brinell hardness testing machines, as described in ISO 6506-2. It also specifies the procedures needed to ensure the metrological traceability of the calibration machine. The current edition is ISO 6506-3:2014, and ISO lists a revision as under development.
The standard sits alongside ISO 6506-1, the Brinell test method, and ISO 6506-2, machine verification. Labs that run indirect verification rely on blocks calibrated under this part, so the block certificate and its traceability matter as much as the tester itself. Before ordering or using blocks, labs usually confirm that the calibration refers to the edition cited in their quality system and covers the test condition they actually use.
Reference blocks and accessories, such as our hardness test blocks, indenters and accessories, are used for the indirect verification of Brinell testers that work to the ISO 6506 series. If you need help matching ISO 6506-3 requirements to your parts or setup, contact our team.
