The paper presents tribological properties of A390.0 (AlSi17Cu5Mg) alloy coupled in abrasive action with EN-GJL-350 grey cast-iron.

The silumin was prepared with the use of two different technologies which differed in terms of cooling speed. In the first case the alloy

was modified with foundry alloy CuP10 and cast to a standard tester ATD and in case of second option the modified alloy was cast into

steel casting die. Due to different speed of heat removal the silumins varied in structure, particularly with size of primary crystals of silicon

and their distribution in matrix which had a significant influence of friction coefficient in conditions of dry friction.