Vacuum Carburizing
- Exceptional surface hardness
- Improved wear & fatigue resistance
- Tough, durable core
- Ideal for gears, pins, bushings, and firearm components
Heat treating is our process. Integrity is our standard. Excellence is what we deliver.
Precision Heat Treating
For critical firearm & industrial components
Advanced heat treating services using proven processes and state-of-the-art equipment — to enhance performance, extend life, and ensure the reliability of your critical components.
- Heat
- Integrity
- Care
- Excellence
Thermal Processing Services
Comprehensive thermal processing solutions for components that cannot afford to fail.
Vacuum Hardening
- Oxidation-free processing
- Clean, bright finish
- Minimal distortion
- Consistent hardness & dimensional stability
Annealing
- Reduces hardness
- Relieves internal stresses
- Improves machinability
- Prepares for further processing
Normalizing
- Refines grain structure
- Improves toughness
- Uniform mechanical properties
- Excellent for steel components
Induction Heat Treating
- Precise, controlled heating
- Fast, efficient & repeatable
- Ideal for hardening shafts, pins, gears, and critical components
- Minimal distortion with consistent results
Tempering — Hardness Meets Toughness
Hardening alone leaves steel brittle. Tempering is the controlled step that turns raw hardness into dependable performance.
Precision Tempering
After hardening, parts are tempered in controlled furnace cycles to hit the exact hardness specification your application demands — trading a measured amount of peak hardness for the toughness and impact resistance that keep components working under load instead of cracking under it.
Every tempering cycle is documented and verified: furnace cycles are controlled, hardness is verified on the finished parts, and lots are tracked from receipt to return.
Rifle Barrels
Bolt Carrier Groups
Triggers & Fire Control
Gears · Pins · Shafts
What tempering delivers
- Optimizes the hardness / toughness balance
- Improves impact resistance
- Reduces brittleness
- Enhances reliability
Paired with
- Vacuum hardening for a clean, bright finish
- Stress relieving to minimize distortion
- Hardness verification on every lot
Advanced Processing
Specialty processes for components with demanding performance requirements.
Cryogenic Processing
- Deep cryogenic treatment to −300°F
- Converts retained austenite
- Improves wear resistance
- Enhances dimensional stability
- Extends component life
Stress Relieving
- Reduces residual stresses
- Minimizes distortion
- Improves dimensional accuracy
Induction Heat Treating
- Precise, localized heating
- Fast, efficient & repeatable
- Ideal for shafts, gears, pins & other critical parts
Firearm component specialists — precision heat treating for rifle barrels, bolt carrier groups, and triggers & fire control parts.
Quality & Certifications
MMS Thermal Processing is committed to providing consistent, repeatable, and fully documented thermal processing services that meet customer specifications and performance requirements.
Nadcap
Accredited · Heat Treating
Nadcap accreditation for heat treating — the aerospace and defense industry's benchmark for special-process quality.
ITAR
Compliant
ITAR compliant handling for defense and firearm components, with full process traceability and lot tracking.
Quality Commitment
- Process traceability
- Controlled furnace cycles
- Hardness verification
- Material certification review
- Process documentation
- Lot tracking
- Continuous improvement
- Customer-focused service
Standards Awareness
Processes performed in accordance with applicable customer requirements and industry standards, including:
- AMS Heat Treat Specifications
- ASTM Material Standards
- SAE Specifications
- Military Specifications (when required)
- Customer-Specific Quality Requirements
Industries Served
- Firearms Manufacturing
- Defense
- Aerospace
- Automotive
- Agricultural Equipment
- Industrial Manufacturing
- Tool & Die
- Heavy Equipment
Precision heat treating. Consistent results. Reliable performance.
Request a Quote
Tell us about your parts and the process you need. The form opens a pre-filled email to our sales team — or reach us directly:
Facility
3223 Research Parkway
Davenport, IA 52806
Davenport, IA 52806
Main Office