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Heat Treating

What is Heat Treating?

Heat treating is the practice of applying heat to different types of material and either cooling or quenching to achieve the desired strength levels requested by our customer drawings or applicable specifications.

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What Items are Heat Treated?

Manufacturers for all industries, including Aerospace, Automotive Racing, Molding, etc. use heat treating to modify metals and alloys. Every time you see a piece of metal or plastic, it has most likely been heat treated, from the smallest screws to rocket ship tips and earth mover chassis.  Manufactured pieces of metal or plastic have strength and performance requirements that can be met by heat treating procedures. 

Our Quality Policy

National Thermal Processing shall deliver the services and products that meet the customer's requirements. National Thermal Processing commits to continuous improvements by training its people, upgrading equipment, eliminating nonessential practices, and creating a quality conscious environment.


Neutral Hardening

A process using oil & salt quenching to harden steel without any oxidation or scaling.  This process also hardens without adding or taking away carbon from the steel.

  • Alloy Steel

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Hardness Testing

After each order is treated, our team performs a hardness inspection to verify the metal meets the customer's specifications.

  • Alloy Steel

  • Copper Alloys

  • Stainless Steel

  • Aluminum

  • Nickel Alloys

  • Composites