I accidentally brushed my screwdriver against the H60 radiator's "steel" and the radiator is not broken, but i can see some of that "fin-like steel" bent.
Is it okay or do I need to replace with a new one?
Just make sure none of the fins or parts therof are detached / cracked from their base. That will affect cooling (and if bad enough will leak liquid); it's all about heat transfer from the base plate to the fins and thereby into the air.
But it sound like you just had a screwdriver slip and dance across the face of the rad without too much force.