The problems that can be solved encompass practically all fields of human activity, e.g. they are related to constructions like bridges, ships, airplanes, machines, etc., or to transport, refinement or other engineering systems, or in general, to design or manufacturing of the mentioned constructions and systems. However, recent design and manufacture are based on numerical analysis supported by highly capacitive computers. It is generally known that the design is considered as the best one, if it is based on experimental data. In accordance with this, experimental investigations related to material properties of St 44-2 non alloy structural steel were performed. Based on these studies, the paper presents data on the tensile strength, 0.2 offset yield strength, creep behavior and Charpy impact energy.