I have never seen one, even when exploring in creative mode. Are you sure? or was this added after .33? I can do a quick scan and see but I think something's wrong.
Also, that still doesn't address the fact that steel is just absolutely not made with graphite it's made with coal, specifically anthracite (not lignite), refined to coke, which is my main complaint.
I'm going to go lay down, my head hurts badly now.