Red Iron is a magical variant of Iron Ore mined in Iros Forge in the Bloodmane Hills. It is prized for its value in creating weapons and armor with special properties. It can also be known by the names Devilbane, or Dwarfbane.
In 5e, Red Iron weapons count as magical for the purposes of overcoming resistance. They can be purchased in Wydmoor and probably major Odessan cities. The cost of Red Iron weapons is 250 GP per pound.