What is aushardening?

I've never seen that word before, but... Perhaps:

 

A german loan word that's become half-English for hardening (like tempering steel)?

To be honest, it looks more like a massive spelling mistake than anything else, when I look at Google's 4 hits.

 

It looks a little like "uitharden" which is a Dutch word for tempering / hardening. This is how I got the idea.

aus in german means "out of" or "from"

 

Either that or aus is referring to australia

may be something to do with cricket

Good guess CaptainPanic.

 

Austempering is heat treatment for steel. I'm guessing it's just another word for that. The aus- comes from austenite, a phase of steel.