All you need to
know.

A Brinell hardness value consists of the following components:

1. The numeric hardness value;
2. The three letters "HBW", standing for "Hardness according to Brinell" (with hard metal ball made from tungsten carbide);
3. The ball diameter in mm;
4. The applied test load in kgf;
5. According to ISO 6506: The dwell time of the test load, but only if this is not between 10 and 15 seconds (uncommon in practice)

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