Dark Iron Bar

Dark Iron Bar is a rare metal that can be smelted only in the Black Forge in Blackrock Depths.

Source
Dark Iron Bar is smelted by Miners with a skill level of 230. Smelting Dark Iron can only be done in the Black Forge in Blackrock Depths. All smithed items needs to smithed in the Black Anvil in Blackrock Depths, while only the needs to be engineered there. See Dark Iron for more info, including how to learn the Smelt Dark Iron skill.

To smelt one bar, you will need 8x Dark Iron Ore.

The ability to smelt Dark Iron Ore is taught by the quest Quest:The Spectral Chalice given by Gloom'rel.

Dark Iron Bar as an ingredient
This item is used to make:

Blacksmithing

 * Dark Iron Mail
 * Dark Iron Shoulders
 * Dark Iron Plate
 * Dark Iron Reaver
 * Dark Iron Destroyer
 * Dark Iron Pulverizer
 * Dark Iron Sunderer
 * Fiery Chain Shoulders
 * Fiery Chain Girdle
 * Dark Iron Bracers
 * Dark Iron Boots
 * Dark Iron Gauntlets
 * Dark Iron Leggings
 * Dark Iron Helm
 * Black Amnesty
 * Persuader
 * Nightfall (axe)
 * Ebon Hand
 * Blackfury
 * Blackguard
 * Sulfuron Hammer

Engineering

 * Ultra-Flash Shadow Reflector
 * Hyper-Radiant Flame Reflector
 * Dark Iron Rifle
 * Biznicks 247x128 Accurascope
 * Dark Iron Bomb

Jewelcrafting

 * Figurine - Dark Iron Scorpid