Cobalt

Cobalt was a chemical element with the symbol Co and atomic number 27. Cobalt was a ferromagnetic metal. It was a naturally-occurring element, and was commonly found in a number of ores. Cobalt was used in numerous alloys, and some cobalt-based materials were also used in weapons.

The antimatter relays of an NX-class starship were lined with a platinum-cobalt alloy. 

In 2154, the carried eighteen kilograms of tritanium-cobalt, of which nine were used to bribe guards in releasing slaves on the Verex III Orion processing station. 

The Lysian Central Command space station was armed with thirty-nine cobalt-fusion warheads. Other military uses of cobalt included cobalt-thorium devices, cobalt bombs, and the nerve agent cobalt diselenide. 

The body of the Soong-type android Data included 11.8 kilograms of molybdenum-cobalt alloys.