ABSTRACT
The paper analyses the relationship between the Brinell hardness of steels produced in the years 1895-1930 and their strength parameters, i.e. yield strength and tensile strength. After making appropriate samples, the Brinell hardness of unloaded samples was measured using a stationary hardness tester. Subsequently, the samples were tested for tensile strength, which in turn allowed for determining both their yield strength and tensile strength. The obtained results were subjected to statistical processing, and as a result the appropriate relationships between the Brinell hardness and strength parameters of the four subsets of historical steels from the years 1895-1930, and a set that included bridge steels from the years 1873-1938, were derived for the tested steels. The studies of the steels from the years 1895-1930 were supplemented with studies of the chemical composition and microstructure. The paper was summarized with conclusions of a practical nature.
