Cast iron usually refers to gray iron, ductile iron and malleable iron. Which is an iron casting with carbon content higher than 2%. Cast steel usually refers to normal carbon steel and alloy steel. Which is a steel casting with carbon content lower than 2%. Therefore, no big difference from the chemical content and raw materials for cast iron vs cast steel.
metal is the base material for both cast iron and cast steel. Gray irons are alloys of iron, carbon and silicon, in which more carbon is present than can be retained in solid solution in austenite at the eutectic temperature. The carbon precipitates as graphite flakes. The gray irons typically contain from % % carbon and 1% 3% silicon as major