General property of cast iron (as a class of ferrous alloys) Cast iron, in general (ignoring special ductile/malleable grades), is best described as which type of material? Choose the correct option.

ConceptTypical gray and white cast irons contain flake or combined carbon morphologies that make them brittle under tensile loading (low ductility). Special grades (malleable iron, ductile/nodular iron) are exceptions, but the general statement for “cast iron” is brittleness.

Final AnswerBrittle material