The hammers are interesting.  I worked in a steelmaking plant where we made steel for a major hammer maker. It was huge amounts of about 600 tons at a time...1,200,000 pounds and did this every couple of months.  Where do all of the hammers and  tools go? Do they get lost. ?  
The steel was a plain carbon with 0.55% Carbon.  The steel was cast into 7" squares and 40 ft long.  It was then rolled into rounds to ship to the customer for forging.