- White cast iron
- Nodular cast iron
- Malleable cast iron
- Alloy cast iron
Answer: Option 4
When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces Alloy cast iron. Alloy cast iron - cast iron containing alloying elements (usually nickel or chromium or copper or molybdenum) to increase the strength or facilitate heat treatment. Alloy cast iron - an alloy of iron containing so much carbon that it is brittle and so cannot be wrought but must be shaped by casting.