The Vickers test is a versatile method, with only one type of indenter and a broad load range. It is suitable for a wide range of applications to test all solid materials.
Vickers Indent Spacing
When performing a vickers hardness test, your indentation will deformate the surrounding material and alter its properties. In order to avoid misinterpretations of the perceived hardness, the standards therefore prescribe a certain distance between multiple indentations. For steel and copper, indentations have to be spaced with at least 3 diagonal widths, whereas for lead, zinc, aluminium and tin the indent spacing has to be at least 6 diagonal widths.
Please also observe that the minimum diagonal width, according to international standards, should preferably be at least 20 µm in order to ensure accurate reading of the indents. This for instance implies that CHD measurement using less than HV0.2 generally should be avoided, as it will produce indents smaller than 20 µm.
See the overview of the Vickers methods and the most common applications.