John Henry Irons, known as Steel, is a prominent superhero in DC Comics, renowned for his intellect, engineering prowess, and unwavering moral compass. Created by Louise Simonson and Jon Bogdanove, he first appeared in The Adventures of Superman #500 in June 1993 during the "Reign of the Supermen" storyline. A brilliant weapons designer employed by AmerTek Industries, Irons became disillusioned after his advanced BG-60 "Toastmaster" firearms fell into criminal hands, causing widespread destruction. Faking his death to escape retribution, he relocated to Metropolis under the alias Henry Johnson, where Superman saved his life during a construction accident, profoundly inspiring him with the mantra that one person can make a difference.

Following Superman's apparent death in battle against Doomsday, Irons crafted a high-tech powered exoskeleton suit granting superhuman strength, flight, and durability, adorned with an "S" emblem as a tribute. Emerging as the "Man of Steel," he became one of four claimants to Superman's legacy, distinguishing himself through genuine heroism and technological ingenuity, including a kinetic hammer weapon. Upon Superman's resurrection, Irons respectfully adopted the name Steel, forging a lasting alliance with the Man of Steel and establishing himself as a protector of Metropolis committed to non-lethal justice and community welfare.

Over the years, Steel's character evolved significantly, starring in his own solo series from 1994 to 1998 that explored themes of responsibility, innovation, and social issues. He joined prestigious teams such as the Justice League and the Supermen of America, while mentoring his niece Natasha Irons, who later assumed the Steel mantle. Through various continuity reboots, including The New 52 and DC Rebirth, Irons has remained a symbol of human potential and resilience, often collaborating with Superman's extended family and embodying the folk hero John Henry's legacy of strength and perseverance.