Is this a serious question? You really don't know?$B$BIf you are the cowardly sort, afraid to get their hands too dirty, you will find Dark Iron scraps on the creatures in the Burning Steppes and Searing Gorge.$B$BIf you're the bloodthirsty adventuring type, the dungeons of Blackrock Spire and Blackrock Depths hold quite a large supply of the scraps.