Items, NPCs, quests, objects and spells of patch 1.12.1, read live from the realm itself.

Mithril Bar

Quest	Level	Side
Smelt On, Smelt Off	45	Both
The Great Silver Deceiver	45	Both
The Art of the Imbue	45	Both
Zinfizzlex's Portable Shredder Unit	60	Horde
Zinfizzlex's Portable Shredder Unit	60	Alliance
The Horde Needs Mithril Bars!	60	Both
The Horde Needs More Mithril Bars!	60	Both