Steel armor MK I

The MK I model of armor was developed by John Henry Irons. It was initially designed for use by the United States military, but John discontinued his work with the government in favor of developing projects for his own private use. John Henry Irons was a survivor of Doomsday's attack on Metropolis, which saw the temporary demise of Superman.

With no Superman to protect the city, John Henry Irons decided to do his part. He completed work on the armor and outfitted it with an S-shield in honor of the fallen hero. Along with a kinetic hammer, John began calling himself Steel and used the armor to fight off low-level threats in Metropolis, such as criminal cartels that were using Toastmaster weaponry based on his work.