So would I, B15. So would I. I know that things are done in a different process.
I did a google search on Cryogenic treatment of brass instruments and came up with this:
- ncrease resistance to abrasive wear
- Requires only one permanent treatment
- Changes the entire grain structure of the metal, not just the surfaces
- Refinishing or regrinds do not affect permanent improvements
- Eliminates thermal shock through a dry, computer controlled process
- Transforms most retained austenite to hard martensite
- Forms micro-fine carbide fillers to enhance carbide structures
- Increases durability and wear life
- Decreases residual stresses in tool steels
- Decreases brittleness
- Increases tensile strength, toughness and stability
- Relaxes internal stresses
- Works on new or used tools
- Reduced down time, less maintenance and higher productivity
- Deep cryo processing is compatible with other treatments (TiN, Chrome, Teflon etc.)
- High alloy steel cutting tools stay sharper longer, fewer micro-cracks, less chipping
- Results in the orderly arrangement of crystals, increases internal bonding energy, and achieves a structural balance throughout the mass of the material
which I copied and pased from
http://www.cryoplus.com/advantages.html
How is it different from exposing to an overnight temp of 25F? I don't know.