The hardness of a material (mostly aluminium components) is defined as its resistance to the penetration of a (harder) body. This relatively general definition allows very different processes and principles. The hardness values determined with different methods are therefore not comparable or only comparable subject to reservations. If hardness test results are to be compared, this is only possible without comparative measurement for the same test method with the same test parameters (load type, type of measurement, measured variable, indenter geometry, indenter material, magnitude of load).
By definition, stationary (classical) macro hardness testing according to Vickers, Rockwell and Brinell can only be used for elastic-plastic or elastic-viscoplastic materials. In these materials, the yield strength Rp is smaller than the tensile strength Rm, which leads to irreversible deformations. In addition to the methods conforming to the above standards (e.g. TIV), various principles are used for elastic-plastic materials and only elastic (rubber-like) materials (e.g. Shore).
The test according to Brinell (DIN EN ISO 6506-1, is carried out with a ball diameter of 1mm, 2.5mm and 5mm), Vickers (DIN EN ISO 6507-1) and Rockwell (DIN EN ISO 6508-1).
A fast and uncomplicated execution makes short-term results possible.