Hardness tests are widely used for determining comparative hardness numbers for metals, because of their simplicity and rapidity of operation. If appropriate charts or equations are known a given hardness number can be converted to other hardness numbers or to some of the mechanical properties.
Arbtin, Emil Jr. and Murphy, Glenn, "Correlation of Vickers hardness number, modulus of elasticity, and the yield strength for ductile metals" (1953). Ames Laboratory ISC Technical Reports. 50.