It is a non-destructive test that allows very localized investigations, they do not destroy or alter the piece on which the tests are carried out and allow other fundamental mechanical properties to be deduced.
Hardness is comparable to the resistance of metals to plastic-elastic 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 a hardness tester.
Hardness tests determine the resistance offered by a material to being penetrated by another (penetrator). There are several scales for measuring the hardness of materials. In fact, the most used are:
The evidence cannot be compared with each other, as the nature of the evidence is different. Hardness tests are performed with machines equipped with indenters with different shapes and with different methods.
Thanks to a new, high-tech, fast and precise instrumentation, 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.
We can also arrive very well on inserts and minimum thicknesses from 1.5mm upwards so now we are able to investigate low thicknesses as well 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 of load can be used, 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 perform conversions in accordance with the ASTM E 140-13 and EN ISO 18265 standards and different hardness scales will be available: