Iron

Iron may refer to the following:


 * Iron (Material)- A material used by the UNSC.
 * Iron Skull- A skull that can be found in both Halo 2 and Halo 3. It may refer to the following:
 * Halo 2's Iron Skull
 * Halo 3's Iron Skull
 * Iron (Achievement) - The achievement for obtaining the aforementioned skull.