Thorium Bar

A thorium bar is a strong, hard metal smelted from Thorium Ore. Used in very many Artisan-level crafting recipes and as a basis for creation of Arcanite and Enchanted Thorium Bars.

Source
Thorium Bar can be created by Miners using their smelting ability at a forge.

An ingredient
Thorium Bar is used in the following recipes:

Alchemy

 * Transmute: Arcanite
 * Creates one Arcanite Bar from one Thorium Bar and one Arcane Crystal

Mining (Smelting)

 * Enchanted Thorium Bar
 * Creates one Enchanted Thorium Bar from one Thorium Bar and 3 Dream Dust

Engineering

 * Arcane Bomb
 * Field Repair Bot 74A
 * Gnomish Alarm-o-Bot
 * Salt Shaker
 * Thorium Grenade
 * Thorium Rifle
 * Thorium Tube
 * Thorium Widget

Jewelcrafting

 * Emerald Crown of Destruction
 * Figurine - Black Diamond Crab
 * Figurine - Emerald Owl
 * Thorium Setting

As a quest objective

 * Imperial Plate Belt (quest)
 * Imperial Plate Boots (quest)
 * Imperial Plate Bracer
 * Imperial Plate Chest (quest)
 * Imperial Plate Helm (quest)
 * Imperial Plate Leggings (quest)
 * Imperial Plate Shoulders (quest)
 * That's Asking A Lot
 * Icebane Bracers (quest)
 * Icebane Breastplate (quest)
 * Icebane Gauntlets (quest)
 * The Alliance Needs Thorium Bars!
 * Active only during the opening of the Gates of Ahn'Qiraj.


 * Zinfizzlex's Portable Shredder Unit (quest)