Steel ingots are made with iron or and corundum ore.
Darkwater Crossing for corundum ore Dawnstar for iron ore (plus 3 or 4 others, its common)
Did you mean orichalcum ore? You can get that at Dushnikh Yal. Pretty sure I found some random viens while exploring too --- Current trophy hunt: Darksiders 43/43 | Dragon Age Origins 24/55 (no DLC) MHTri / MHP3rd: http://www.youtube.com/newtsute