Abstract: A process for the production of a compacted graphite cast iron which is substantially free of carbides in castings as thin as 0.15 inches, and with nodularities of less than 20% by volume without postinoculation, which comprises adding aluminum to a compacted graphite cast iron, such that the compacted graphite cast iron consists essentially of about 0.5 to 7% by weight aluminum, about 2.5 to 4% carbon, 0 to about 1.5% silicon, with the remainder iron and inevitable impurities.The compacted graphite cast iron produced thereby is useful in the production of castings with both thick and thin sections.