Iron is a marketable item, and a raw material. Iron is used to produce Steel.
Players can obtain Iron by:
Iron production in a company is boosted by 20% if the company is located in a region which contains an Iron deposit.
Producing 1x Iron in a company consumes 1 Production Point.
Players can use iron to create Steel, by owning a Steel production company.
Producing 1x Steel in a company consumes 10 Production Point and 10 Iron.