Grey Cast iron, also known as flake graphite cast iron, is a type of type of cast iron in which most of the carbon is present as flake graphite corresponding to Form I of IS 7754. The properties of Grey Cast Iron depend on the distribution, size and amount of graphite flakes, and the matrix structure. These factors are in turn, influenced mainly by the manufacturing conditions, chemical composition, solidification time and rate of cooling in the mould. Grey cast iron exhibit low to moderate strength, low modulus of elasticity, low notch sensitivity, high thermal conductivity, moderate resistance of thermal stock, and outstanding cast ability.