Strongest non-legendary Steel Type | Bulbagarden
Personally, I think Metagross, great typing combined with 135 base Attack, 130 base defence, Meteor Mash, Bullet Punch and Zen Headbutt are great STAB moves, the latter falls short but isn't to be misjudged.
Steelix is awesome, but isn't the strongest, maybe if he had more attack power and speed he would shine.