FYI: I just purchaseda few fireplace bricks for $1.69ea at Fleet Farm. Admiral Steel has lots of info on heat treating at their site, as well as lots of other technical info. I also purchased a propane torch with 4' hose for $29, also at Fleet farm, and an adapter to fit it to a 20#propane tank, about $16 at the hardware store. Making a small enclosure out of bricks; one on bottom, 2 on narrow edge, forming a "V" on top of the base, and one on top, the torch turned a piece of 1070 bright red in about 3 minutes. Maybe less. No hair dryer needed.