Množina: cast irons

An alloy of iron containing so much carbon that it is brittle and so cannot be wrought but must be shaped by casting.
Cheap but invaluable constructional material, most commonly used for automobile engine blocks. Cast iron is partly refined pig (crude) iron, which is very fluid when molten and highly suitable for shaping by casting; it contains too many impurities (for example, carbon) to be readily shaped in any other way. Solid cast iron is heavy and can absorb great shock but is very brittle. castiron

1. Made of cast iron
2. Resembling cast iron: as capable of withstanding great strain; not admitting change, adaptation, or exception; rigid
3. Extremely robust; SYN. iron.