The art of efficiently working iron in significant qualities was introduced to the Centralian Sea by the Mians, who maintained a monopoly on the process for some time. They learned the technique from the Gratians. However, their secret was eventually stolen by the Domirans and independently discovered by the Remerans after they realized it was possible. By 400 AF iron usage was widespread around the Centralian Sea.
Iron allows weapons far superior to the previous bronze ones, and cold iron is rumored to protect against magic. Smiths are well respected.