Bronzium

Bronzium is a grade 2 premium scavenged metal crafting material.

Source
Bronzium can be gathered from a Bronzium Wreckage or Chanlon Vehicle Debris node, which requires 80 skill in scavenging. It is most commonly found on Taris,  Balmorra, and Nar Shaddaa.

The following materials can also be found in Bronzium Wreckage or Chanlon Vehicle Debris nodes:

It can also be obtained from grade 2 scavenging missions. Additionally, there is a chance to obtain Bronzium from reverse engineering the appropriate level and type of gear.

Uses
Bronzium is used in several crafting schematics: