Steel first appeared in a series set in 1939, "Steel: The Indestructible Man", written by Captain America writer Gerry Conway. The series was canceled after five issues, and Steel later made a guest-appearance in "Justice League of America". Steel was also a member of the World War II era "All-Star Squadron" team. He made a prominent appearance many years later in four issues of the "Eclipso" ongoing series, where he was killed. After this, he appeared in issue #2 of the 2010 series, "DC Universe: Legacies", which chronicled the superheroes of the 1940s.