Question: is ductile iron the same as carbon steel?
Answer: Ductile Iron vs Steel. ... Note: Ductile iron with its carbon content of 3.0%-3.9% has a higher carbon content than cast steel which normally has a carbon content of 0.08%-0.60%. Tensile Strength. While there is no large difference when it comes to tensile strength, ductile iron has the greater yield strength (40 ksi).