Hard facts
Theory of hardness testing
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A Vickers hardness value consists of the following components:
1. The numeric hardness value (between 1 and 3000);
2. The two letters "HV", standing for "Hardness according to Vickers";
3. The applied test load in kgf;
4. According to ISO 6507: The dwell time of the test load, but only if this is not between 10 and 15 seconds (uncommon in practice)
