First appearance: Steel, the Indestructible Man #1 (March 1978)
His comic would last for five issues before he became a victim of the "DC Implosion", but he would return a few years later as part of Roy Thomas' All-Star Squadron.
It was also in that series that the character would become known as "Commander Steel".
from Who's Who: The Definitive Directory of the DC Universe Vol. V (July 1985)