The conversion tables given in this standard present data on the relationship among the Brinell hardness, Vickers hardness and Rockwell hardness and apply to the following materials:
a) Unalloyed and low alloy steels and steel castings in hot-worked or heat treated condition like forged, annealed, normalized and quenched and tempered conditions provided that they are homogeneous. For steels, the relationship between tensile strength and the different scales of hardness are also indicated (see Table 1 );
b) Aluminium and aluminium alloys ( see Table 2 ); and
c) Copper and brass ( up to 30 percent zinc ) (see Table 3 ).
IS 4258-1982 history
1982IS 4258-1982 Metal material hardness conversion table