This test, more commonly known as the
Test Vickers test, finds greater use in the laboratory
than the workshop. It employs a pyramid
shaped diamond with an included angle of
136o which is impressed into the specimen
using loads of 5 to 120 kg making a small
square impression. This test is used for
finished or polished components because the
impression can be very small. The diamond
pyramid hardness number is obtained from a
calculation based on measuring the diagonals
of the impressions in the steel.