- Pig Iron is the intermediate product of smelting iron ore.
- Pig Iron contains a large amount of carbon.
- Pig Iron can also be used to produce Gray Iron.
- Pig Iron always contain foreign substances, among which are Carbon, Silicon, Sulphur, Phosphorus and Manganese besides many others in smaller proportion.
- Pig Iron refers to the metallic product of a furnace that contains over 90% iron.