Does steel still have his hammer? Last comic I read he had just had that weird metal coating on his body and his daughter or niece, escapes me at the moment, was running off to get lex luthoers superhero transformation thingie. I haven't had a chance to get any newer ones. so i don't know feats yet.
OH DEAR GOD. I just reread the thread, and realized it said with armor and hammer. ...
In that case, he can get to Hulk (Iron man being a very tough, but close fight.) although hulk would start at base, he'd get stronger.. and steel lose lose the fight there.
Old school steel with only the hammer and armor would stop at 6. colossus and thing are around his strength range. No one really list his strength level but considering that aqua man is now at 70 tons it is reasonable to say that the 90 ton range they list him in at the justice league unlimited website is probably accurate. Even if he was half as strong as that he would have a distint advantage over 1-5 with long range attacks and pure intelligence alone. New steel if he is using a combination of his current power and suit would be to durable for 1-8. It would be an interesting battle with superman. But I don't think he could beat superman unless he was wearing the aegis armor. My only question is will still powers be augmented by his suit.
Oh, i suppose i should state why I believe as I do. The first 3 is not as strong as steel. Rogue may be close, but she is not invulverable. Steel would knock her out with his hammer. Even at close range, he would not need much to defeat her. Thing and Colossus. Well he would fight them the same way. He would use long range attacks he would soften them up with his wrist mounted rail gun from about a 100 yrds they would become careless when they realized that those rail spike cant pierce their hide. He would then throw his hammer which collect kinetic energy the further it is strong and would knock them out. He would then stand over thing and say " you just got knocked the f@%# out" This is classic steel. Upgraded steel. I don't know. I am sure you are wondering about the hulk. Savage or not. The hulk cant fly. He only ways half a ton. Steel grabs him from behind flies straight up hits escape velocity and lets go. He is stuck in orbit untill his orbit degrades which could be never. This is not what would happen in the average comic, but given his intelligence and abilities, it would be the smart thing to do.