No but but you will find plenty Cryogenic wailers on this forum!

Cyrogenic treatment for stress relief of heat treated parts is done in various areas. We see it more in gears than anywhere else, and it seems to have made some inroads for gun barrels as well.

What parts, and more importantly, what particular alloy are you considering for this process and what are you hoping to achieve?

yes, I’m familiar with them. They are a reputable company and have been around for quite a while in cyrogenic treatment. In the testing I’ve been involved in, we haven’t really seen an advantage to this post process (others have however).