Central Indiana’s Premier Specialty Heat Treater Since 1952
WHY USE CIRCLE CITY HEAT TREATING?
- Central Indiana’s premier specialty heat treater since 1952
- Long standing reputation for outstanding quality and extraordinary customer service
- Trained professionals with over 100 years of collective heat treating experience
- Superior technical advisory and support services
- State of the art facility, equipment and controls
- Unmatched operating capacity
- Customers gain the benefit of over five decades of heat treating innovation
SERVICES
Vacuum Heat Treating 
- Hardening (nitrogen quench)
- Vacuum Tempering
- Vacuum Annealing
- Vacuum Stress Relieving
- Vacuum Solution Treatment
- Vacuum Precipitation Hardening
Controlled Atmosphere Heat Treating
- Oil Hardening
- Carbon Nitriding
- Carburizing
Black Oxide Services
Open Air Stress Relieving and Normalizing
Cryogenic (Deep Freezing) Services 
Other Services
- Technical Advisory & Support Services
- Straightening
- Sand & Bead Blasting
- Flame Hardening
- Hardness Testing
- Certifications
OUR CUSTOMERS
- Tool & Die Makers
- Mold Shops
- Engineering and Machine Companies
- Industries:
- Automotive
- Aerospace
- Auto Racing and Motorsports
- Medical
- General Manufacturing
- All Steels, Aluminum, Copper and Brass
OUR INDUSTRY AFFILIATIONS
- Member of Metal Treating Institute
- Member of ASM International
