- Steel is the name of John Henry Irons, who took on a superhero identity after the death of Superman.
- Steel was also the name of Natasha Irons, John Henry Irons' daughter, who took on the identity from her father.
- Commander Steel was a superhero during World War II.
- Henry Heywood III was the grandson of the original Commander Steel and took on his name.
- Nathaniel Heywood was the cousin to Henry Heywood III and took on the identity Citizen Steel.
- Steel is the name of the horse that belongs to the western hero Kid Colt.
- Michael Steel is the birthname of the supervillain Ironclad.