This International Standard describes the application of the Vickers and Knoop microhardness tests to metallic coatings.
This method is applicable where macrohardness testing is not suitable because of the large test forces required, that is, where indenter forces generally need to be below 10 N as for elec-trodeposited coatings, autocatalytic coatings, sprayed coatings and anodic coatings on aluminium.
To obtain satisfactory results, it is necessary to have a suffi-This International Standard describes the application of the Vickers and Knoop microhardness tests to metallic coatings.
This method is applicable where macrohardness testing is not suitable because of the large test forces required, that is, where indenter forces generally need to be below 10 N as for elec-trodeposited coatings, autocatalytic coatings, sprayed coatings and anodic coatings on aluminium.
To obtain satisfactory results, it is necessary to have a suffi-
cient coating thickness, and it is usually advantageous to carry out the test on cross-sections (see 7.3 and 7.4).
NOTE — Attention is drawn to the fact that a general standard on Vickers and Knoop microhardness tests is being developed by ISO/TC 164, Mechanical testing of metals. The same technical committee is also developing standards for the verification of microhardness testing machines and for the verification of standardized test blocks to be used with such machines.
SANS 4516:1980 history
0000 SANS 4516-2008
1980SANS 4516:1980 Metallic and related coatings - Vickers and Knoop microhardness tests