The work presents results of investigations concerning the production of cast iron containing about 5-6% aluminium, with the ferritic

matrix in the as-cast state and nodular or vermicular graphite precipitates. The examined cast iron came from six melts produced under the

laboratory conditions. It contained aluminium in the amount of 5.15% to 6.02% (carbon in the amount of 2.41% to 2.87%, silicon in the

amount of 4.50% to 5.30%, and manganese in the amount of 0.12% to 0.14%). After its treatment with cerium mixture and graphitization

with ferrosilicon (75% Si), only nodular and vermicular graphite precipitates were achieved in the examined cast iron. Moreover, it is

possible to achieve the alloy of pure ferritic matrix, even after the spheroidizing treatment, when both the aluminium and the silicon occur

in cast iron in amounts of about 5.2÷5.3%.