
Heavy black STEEL, double-sided.
Game of Thrones Season 1, Episode 9

No one's made a Valyrian STEEL sword
since the Doom of Valyria.
Game of Thrones Season 4, Episode 1

A 14-ton STEEL door.
Money Heist Season 3, Episode 3

into a STEEL cage
with a wolverine?
The Big Bang Theory Season 7, Episode 3

otherwise we've wasted good STEEL on them.
Game of Thrones Season 1, Episode 9