This International Standard specifies the principles of the conversion of hardness values and gives general information on the use of conversion tables.
The conversion tables in nnexes A to F apply to
-- unalloyed and low-alloy steels and cast iron;
-- steels for quenching and tempering;
-- cold working steels;
-- high speed steels;
-- hardmetals;
-- non-ferrous metals and alloys.
NOTE The conversion tables in Annexes B to E are based on empirical results which were evaluated by means of regression analysis. Such analysis was not possible in the case of the values given in Annex A because a sufficient number of results was not available.