Grey cast iron belongs to materials for casting production, which have wide application for different industry branches. Wide spectrum of
properties of these materials is given by the structure of base metal matrix, which can be influenced with heat treatment. Processes of
annealing can be applied for grey cast iron without problems. During heat treatment processes, where higher cooling rates are used, the
thermal and structural strains become important. Usage and conditions of such heat treatment for grey cast iron castings of common
production are the subject of evaluation of this article.