Poldi Hardness Tester, Application : Material Testing

Load is applied to the specimen and a standard test bar in a linear direction through a special Brin
ell Ball of
10 mm dia. by a hammer blow. With the impact load being consistent, the extent of indentations obtai
ned
on the specimen and the test bar depend on their hardness, harder material gives less depth of
indentation. The two diameters of indentations are measured by a special “Magnifiscope" measuring
magnifier supplied with the tester. By referring to the table provided, the hardness of the specimen
can be
determined