Ferro Lad attended the Legion open calls and demonstrated how strong he really was by turning himself into Iron and having Lightning Lad blast him with one of his thunderbolts, then he bent steel to show strength and informed the legion that his
costume turned into iron with him. After being accepted he was sent on a mission to ask Mano of the Fatal Five team to help fight against the Sun-eater.
Later he agreed to be apart of Tharoks plan to increase the superheroes abilities with a intensifier that took its power from a Antimatter Universe. Unfortunately the power up wasn’t strong enough to have any effect on the Sun-eater. As the Legions many attempts failed Ferro Lad threw himself at the sun-eaters core to discover a massive energy as the heart of the sun-eater. Ferro lad believed that if he destroyed the core the sun eater would die, but failed in the attempt as he was blasted away. Ferro Lad told the legion of his discovery and Tharok made a Absorbatron Bomb that would absorb all the sun eaters power defeating it if the bomb could be introduced onto the core.
As they had no time Tharok didn’t build a timing device or driving force pack which meant someone was going to have to take the bomb to the sun eater and detonate it dying in the process. As the heroes stayed silent Superboy said that he would take the bomb seeing as he had invulnerability which meant that he might have a chance of survival. Ferro Lad saw that Superboy was weak and his survival was slim so he sucker punched Superboy, took the bomb, and escaped the ship with it while propelling towards the Sun-eater.
As he reached the core of the Sun-eater, Ferro Lad was successful in detonating the bomb and killing the Sun-eater. Meanwhile the Legion watched as the Absorbatron Bomb tore the cloud apart absorbing the energy and sent lighting across the silent cold black space.
When the legion returned safely they had a funeral was made in Ferro Lads honor for making the biggest sacrifice that saved the galaxy and the millions of lives who live in it.
On the TV show Legion of Superheroes, Ferro Lad is introduced in the episode "Chain of Command". He and Cosmic boy try to help Lightning Lad save his planet. Same as the original story Ferro Lad gives his life to stop the Sun-eater when the detonators fail so he must become the new conductor to set the bomb off and kill the Sun-eater, he dies just after he joined the Legion of Superheroes.
In the season one finale, "Sundown" there’s a scene shown where there’s a rock floating aimlessly in space just after the defeat of the sun-eater and it shows Ferro Lads iron form body in a deep slumber.
Able to turn his entire body into Iron. When in Iron form he has Super strength.