The price of all steel is going through the roof. Short answer, China. They're ramping up production but still can't meet their demand. This is good news for non-Chinese steel producers, especially the U.S. which has been hit horribly over the past few years (try to count all the mills that went bankrupt since 2001).
The bad news is, China's also buying up raw materials. If you think the increases in carbon steel prices are bad, take a look at stainless. We've seen most of our ferroalloy prices DOUBLE in the past few months. Cobalt (the last time I checked) is over $30 per pound, up from $18 just a year ago. The surcharges on stainless (IMHO) will probably be in the dollars per pound region if things stay the way they are.
If you're looking for excitement, the U.S. steel industry is where to watch. It's actually starting to heat up. We're almost DOUBLING our production versus last year. So buckle up, we're in for a wild ride.