Buck Knife Company - Paul Bos heat treating for customer's blades:
http://www.buckknives.com/about-knives/heat-treating/
Prices are pretty reasonable:
PAUL BOS HEAT TREATING PRICE LIST
Subject to change without notice.
Minimum Charge
- Heat treating of up to 20 blades: $85.00
- Each blade over 20: $4.25 up to 100 blades, then $3.75 a blade after 100 blades.
- Mixed Materials: $10.00
Single blades
- Each blade, up to minimum charge $17.00
Maximum of 4 blades
Tempering
- Triple tempering: additional charge $15.00
- Folder springs and folder parts tempered back to spring temper: $1.50 each.
Additional Charge
- Blades over 10 inches: 50ยข per inch additional
- Mixed batches of materials (will advise)
- Extensive cleaning or straightening before heat treating: $50.00/hour for labor.
- Annealing $ 25.00 up to 20 blades, each blade over 20 $ 2.00
Handling
- Handling charge (packaging): $5.00 per package.
Shipping
- Shipping charges will be determined based on your preference (ground, air, overnight)
-Packages cannot exceed 40lbs