Vault Steel

 is an item in the Fallout 76 add-on Nuclear Winter.

Characteristics
Alongside legendary modules, Vault 94 steel is one of the unique crafting components for vault armor.

Locations
Obtained upon completion of any Vault 94 vault raid. It can be earned on all difficulties.

The quantity of steel given varies depending on difficulty, with Novice, Standard and Expert giving 2, 4, and 6 pieces of steel respectively.

It can also be found in high quantities inside of a Scrap this at a scrapbox, though that is only available to a select number of individuals who reported losing junk inside of a Scrapbox.