Copper as a ore is a common material found anywhere underground. it is a brownish ore that can be smelted in the Centriforge .
In its bar form is used in many craftable items in the game. A single block of copper ore can be crafted into 3 copper bars. It requires 1 Processing Power to make. (The Centriforge will always have 1 processing power no matter how many AI cores you have.)
Copper Bars are currently used in the following: