How it's Made... And what it's made with

I love the TV show "How it's Made".  The 4th episode of Season 18 featured horseshoes (for horses, not for tossing).  This is,  of course, a forging process, but that's OK. 

The horseshoes are quench and tempered... which is also OK.  I mean, my grandfather did this sort of thing every day. I have nothing against a water quench and temper when it's appropriate. 

But the best part was when they used an austempered tool, as shown in the photo. Even forgers who practice quenching and tempering know to reach for an austempered tool.