Hartford Heat Treat Services

Hartford Heat Treat specializes in industrial heat treat services in the Kentucky, Indiana, and Ohio Region. Located in Southern Indiana, minutes from Louisville, KY, we are the leader of the heat treating services and post-weld manufacturing.

Types of Metal We Heat Treat

  • Carbon & Alloy Steels
  • Chromalloy
  • Stainless Steel
  • Monel
  • Hastalloy
  • Incoloy
  • Nickel
  • Aluminum
  • Ductile & Gray Irons
  • P91 Chrome

Metal Treating Services


Annealing is to heat (metal or glass) and allow it to cool slowly, in order to remove internal stresses and toughen it. This can increase material stability for further heat treating or working. With our large car bottom furnaces, we can anneal with up to a temperature of 1550°F and up to 120,000 lbs.

Hydrogen Bake-out

This process is to remedy cracks in metal, and through the heat treating process, hydrogen is removed out of the steel, as trapped hydrogen can cause cracking in the weld which is a common issue with weld failure.

Industrial Blasting and Painting

To prepare parts and assemblies by shot blasting & painting to stage for the finishing product, meeting defined production standards, schedules and quality requirements.

Localized Heat Treating

Also known as Differential heat treatment and selective heat treatment, Localized heat treating is a technique used during heat treating to harden or soften certain areas of a steel object, creating a difference in hardness between these areas. There are many techniques for creating a difference in properties, but most can be defined as either differential hardening or differential tempering.

Nondestructive Examination & Testing

As a means of material analysis, techniques are used to evaluate the properties of a material without permanently altering the property being inspected.

Pipe Weld X-ray

As a means of quality control, x-ray inspections allow full examinations of welds or any tiny cracks before and after heat treatment.

Post Weld Heat Treat

Postweld heat treatment (PWHT) is defined as any heat treatment after welding, and is often used to improve the properties of a weldment.

Precipitation Age Hardening

Also called age hardening, it’s a heat treatment technique used to increase the yield strength of malleable materials, including most structural alloys of aluminium, magnesium,nickel, titanium, and some stainless steels. In superalloys, it is known to cause yield strength anomaly providing excellent, high-temperature strength.


As a means of product inspection, radiation is ionized to view objects that cannot be seen otherwise. Materials can be inspected for flaws or defects that the human eye might not see.

Stress Relief Anneal

An annealing cycle with a low temperature soak that results in high strength levels with very moderated ductility and formability.

Stress Relieving

Stress relieving is a technique to remove or reduce the internal stresses created in a metal. These stresses may be caused in a number of ways, ranging from cold working to non-uniform cooling. Stress relieving is usually accomplished by heating a metal below the lower critical temperature and then cooling uniformly.

Sub-Critical Anneal

Subcritical annealing is based on lower temperatures for a longer time, using temperatures as close as possible to, but below, the A1 temperature. This is typically 1256°F , therefore subcritical annealing will take place in the temperature range 932°F – 1202°F. Annealing times may be very long and commonly between 5 to 20 hours. The resulting microstructure and properties depend on the original structure and composition of the metal.


Tempering is to improve the hardness and elasticity of (steel or other metals) by reheating and then cooling it.

Thermal Processes

As a means of semiconductor manufacturing, silicon wafers are heated to high temperatures (1200°C or higher) and slowly cooled to aid in the process of metal reflow.

X-ray Metals

As a means of quality control, metals can be x-rayed to confirm no weak spots or structural issues.

24/7 Operation for Expediting “Hot” jobs

To satisfy the needs of the consumer in a quick and timely fashion throughout all hours and days of the week.

If you have any additional questions, need an estimate? Call us at (812) 725-8272.

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