Investigations of the relationship between the Brinell hardness and strength parameters of structural steels S235 and S355

The paper discusses the results of experimental studies that determine the relationships between the Brinell hardness and strength parameters (yield point and tensile strength) of the currently produced S235 and S355 unalloyed structural steels. The conducted research allowed the relationship between the Brinell hardness and strength of modern structural steels to be determined, as well as empirical equations that enable the estimation of the strength parameters of the analysed steels to be derived.