Before revision: Pig iron of a type used to make ductile iron, stored in a bin Pig iron, also known as crude iron, is an intermediate product of the iron industry in the production of steel which is obtained by smelting iron ore in a blast furnace.
After revision: Pig iron of a type used to make ductile iron, stored in a bin Pig iron, also known as crude iron, is an intermediate good used by the iron industry in the production of steel , which is developed by smelting iron ore in a blast furnace.