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Crude iron as first obtained from a smelting furnace, in the form of oblong blocks.

The product of smelting iron ore (also ilmenite) with a high-carbon fuel and reductant such as coke, usually with limestone as a flux.

Iron in the chemical state in which it exists when tapped from the blast furnace, without alloying or refinement.

Iron tapped from a blast furnace and cast into pigs in preparation for conversion into steel, cast iron, or wrought iron.

Crude iron as first obtained from a smelting furnace, in the form of oblong blocks.

Crude iron that is the direct product of the blast furnace and is refined to produce steel, wrought iron, or ingot iron.