Iron Man was released by Black Sabbath in 1970 on their second album, Paranoid, and quickly became one of the band's defining songs, built around a riff that is still taught to new guitar players today. Its association with strength and machinery grew even stronger after it was used in superhero culture, including the Marvel Iron Man films, which introduced the track to younger audiences. Online, short clips of the riff circulate in edits, memes and workout videos, keeping the song recognisable decades after its first release.