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In this study, the effect of the matrix structure on the dry sliding wear behaviour, friction coefficient and pin temperature of ductile irons was investigated. Wear tests were carried out at normal atmospheric conditions and room temperature on a pin on disc type tester at constant sliding speed (1ms-1) and sliding distance (3.6 km) under various sliding loads in a range of 20 to 60 N. The worn surfaces were examined by scanning electron microscopy (SEM). Wear rate of as-cast ferritic ductile irons increased with increasing test load, whilst that of as-cast pearlitic irons decreased. Tests revealed that, as-cast pearlitic ductile iron exhibited higher friction coefficient and friction temperature than as-cast ferritic ductile iron. The experimental results showed that the friction temperature increased with decreasing the friction coefficient of as-cast ferritic and pearlitic ductile irons. [ABSTRACT FROM AUTHOR]