Hardness Testing (HT)

Hardness Testing (HT)

The Hardness Surveys (HT) can be considered among the non-destructive tests most useful for a rapid evaluation of the mechanical characteristics .

It is a non-destructive test that allows very localized investigations , does not destroy or alter the piece on which the checks are carried out and allows the deduction of other fundamental mechanical properties .

Hardness is comparable to a resistance of metals to alasto-plastic deformation and, like it, hardness is linked to the phenomena of plastic flow induced by localized compression.
These tests are carried out with the use of an instrument called durometer.

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HARDNESS MEASUREMENT
Non-Destructive Test

Hardness tests determine the resistance offered by one material to being penetrated by another (indenter). There are several scales for measuring the hardness of materials. The most used are in fact:

  • Brinell
  • Vickers
  • Rockwell
  • Mohs

The tests cannot be compared with each other, as their nature is different. Hardness tests are carried out with machines equipped with indenters with different shapes and methods.

Thanks to a new high-tech, fast and precise device, we can perform hardness tests on metals, measure ductile materials such as aluminum (20HB) and harder metals (about 1600HV) with the use of a single probe.

In addition, we can reach very well coatings and minimum thicknesses from 1.5mm upwards so now we are able to investigate even low thicknesses but not only that, we can also carry out the investigation inside the hollow pieces, 100% of the internal areas.

Manual and motorized probes from 1N to 100N load can be used as well as probes for special applications where the measurement position is difficult as in the case of gears.

ASTM A1038 and DIN 50159-1-2 standards. Thanks to this new equipment, it will also be possible to carry out conversions in accordance with the ASTM E 140-13 and EN ISO 18265 standards and different hardness scales will be available:

  • The Vickers scale designed to test all types of metals from very soft to very hard.
  • The Brinell scale, designed to test metals that are not excessively hard.
  • The Knoop scale, specially designed for very hard and brittle materials, i.e., ceramic and glass.
  • Rockwell scales, designed to test the hardness of soft or heat-treated and then hardened metals.
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HARDNESS MEASUREMENT (HT)
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