The Steel Barrel is an item created through alchemy in Atelier Annie: Alchemists of Sera Island.

The steel barrel is an upgraded version of the Barrel. It can be thrown at enemies to deal heavy damage to multiple enemies. In the Item Almanac it is recorded as item #9. The steel barrel is created by combining a Barrel with a Dark Clod. The recipe for the steel barrel is found in Else Qulario.