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 Vickers Hardness Tester
Description
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The Vickers hardness test uses a square-based pyramid diamond indenter with an angle of 136º between the opposite faces at
the vertex, which is pressed into the surface of the test piece using a prescribed
force, F. The time for the initial application of the force is 2 s to 8 s, and the
test force is maintained for 10 s to 15 s. After the force has been removed, the diagonal lengths of
the indentation are measured and the arithmetic mean, d, is calculated. The Vickers hardness
number, HV, is given by:
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HV = Constant × Test force / Surface area of indentation
Standard Vickers Scales
Micro-hardness
scales |
Test force
F (N) |
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Low-force
hardness scales |
Test force
F (N) |
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Macro-hardness
scales |
Test force
F (N) |
| HV 0.01 |
0.09807 |
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HV 0.2 |
1.961 |
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HV 5 |
49.03 |
| HV 0.015 |
0.1471 |
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HV 0.3 |
2.942 |
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HV 10 |
98.07 |
| HV 0.02 |
0.1961 |
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HV 0.5 |
4.903 |
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HV 20 |
196.1 |
| HV 0.025 |
0.2452 |
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HV 1 |
9.807 |
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HV 30 |
294.2 |
| HV 0.05 |
0.4903 |
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HV 2 |
19.61 |
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HV 50 |
490.3 |
| HV 0.1 |
0.9807 |
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HV 3 |
29.42 |
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HV 100 |
980.7 |
Standards
BS EN ISO 6507-1:2005,
(BS 427:Part 1:1961) | Metallic materials. Vickers hardness test. Test method |
| ASTM E92-82(2003)e2 | Standard Test Method for Vickers Hardness of Metallic Materials |
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Tel: 01788 522792 • Fax: 01788 522905 |
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