Aluminum is a material added by Tinkers Construct Mod. It is used to mix metals and obtain alumite. It can be found in Aluminum Ore and Aluminum Gravel Ore. Aluminum ingot can be commonly found in dungeon chests. If you put either of these in a furnace, you will get Raw Aluminum. This can be put in a smeltery and made into Liquid Aluminum. This can be turned into Aluminum Ingots using an Ingot Cast, or used to make Aluminum Brass or Alumite.
Aluminum Ingot and Block