Dwarf Fortress Iron [duplicate]
Solution 1:
As the commented possible duplicate mostly focuses on mining, that is not the only source of iron. Two alternatives are:
- Goblinite, smelt down the left over weapons and armor from goblin (invader) attacks.
- Traders, traders sometimes bring lots of weapons, armor and other items made from iron. Can smelt these down after trading for them or obtaining them in other unmentionable ways.