Hardened Elementium Bar

Source
Hardened Elementium Bars are smelted by Miners (500).

Currency for
The following all cost 2 bars to purchase:
 * Plans: Elementium Bonesplitter
 * Plans: Elementium Deathplate
 * Plans: Elementium Earthguard
 * Plans: Elementium Gutslicer
 * Plans: Elementium Hammer
 * Plans: Elementium Poleaxe
 * Plans: Elementium Shank
 * Plans: Elementium Spellblade
 * Plans: Elementium Stormshield
 * Plans: Hardened Elementium Hauberk
 * Plans: Light Elementium Chestguard
 * Plans: Vicious Ornate Pyrium Boots
 * Plans: Vicious Ornate Pyrium Shoulders
 * Plans: Vicious Pyrium Boots
 * Plans: Vicious Pyrium Shoulders

Blacksmithing

 * Brainsplinter
 * Elementium Bonesplitter
 * Elementium Deathplate
 * Elementium Earthguard
 * Elementium-Edged Scalper
 * Elementium Girdle of Pain
 * Elementium Gutslicer
 * Elementium Hammer
 * Elementium Poleaxe
 * Elementium Shank
 * Elementium Spellblade
 * Elementium Stormshield
 * Emberforged Elementium Boots
 * Eternal Elementium Handguards
 * Fists of Fury (plate)
 * Forged Elementium Mindcrusher
 * Foundations of Courage
 * Hardened Elementium Girdle
 * Hardened Elementium Hauberk
 * Holy Flame Gauntlets
 * Light Elementium Belt
 * Light Elementium Chestguard
 * Masterwork Elementium Deathblade
 * Masterwork Elementium Spellblade
 * Mirrored Boots
 * Pyrium Spellward
 * Titanguard Wristplates
 * Warboots of Mighty Lords
 * Witch-Hunter's Harvester

Engineering

 * Agile Bio-Optic Killshades
 * Camouflage Bio-Optic Killshades
 * Deadly Bio-Optic Killshades
 * Energized Bio-Optic Killshades
 * Extreme-Impact Hole Puncher
 * Finely-Tuned Throat Needler
 * Flintlocke's Woodchucker
 * Gnomish Gravity Well
 * Gnomish X-Ray Scope
 * Kickback 5000
 * Lightweight Bio-Optic Killshades
 * Loot-A-Rang
 * Overpowered Chicken Splitter
 * Reinforced Bio-Optic Killshades
 * Specialized Bio-Optic Killshades
 * Volatile Thunderstick