Barrel (Fallout 4)

Metal barrels are world objects in Fallout 4, and a settlement object in its add-on Wasteland Workshop.

Radioactive barrels
Radioactive barrels, despite obviously holding nuclear waste, scrap to 3 acid and 2 steel when found and removed in Workshop mode. Once they are scrapped, the area may remain contaminated for a few seconds before going down to background radiation.