ISO 6507-3 is the ISO standard that specifies a method for calibrating the reference blocks used for the indirect verification of Vickers hardness testing machines, as specified in ISO 6507-2. The method applies only to indentations with diagonals of 0.020 mm or more. The current edition is ISO 6507-3:2018, confirmed by ISO in its last review.
The standard completes the ISO 6507 series together with ISO 6507-1, the test method, and ISO 6507-2, machine verification. Labs that check their Vickers testers with reference blocks depend on the block calibration being done to this part. In practice, a lab confirms that the block certificate cites the right edition, that the test force on the block matches the force it uses, and that the indentation size falls inside the range the method covers.
Reference blocks and accessories, such as our hardness test blocks, indenters and accessories, are used for the indirect verification of Vickers testers that work to the ISO 6507 series. If you need help matching ISO 6507-3 requirements to your parts or setup, contact our team.
