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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.

Difficulty: Easy

Ductile material
Malleable material
Brittle material
Tough material

Correct Answer: Brittle material

Explanation:

Concept
Typical 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 Answer
Brittle material

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