What do the Largest Captive Heat Treaters Look Like in 2026?

In a heat treatment industry exclusive “The Monty Heat Treat News” regularly publishes a list of the “15 Largest Captive Heat Treats-North America” . Currently we are in the process of putting together our 2026 rankings, a list which will see some substantial changes from our 2024 list in that we will be seeing a number of new entries.
 
In a very interesting note we see that this list is dominated by firms which are heavily focused on “LPC” (Low Pressure Carburizing)-to narrow this down even further we see that this means the furnaces in all cases come from one of only two suppliers. 
 
The basic criteria for our rankings are explained below, keep your eyes open for our 2026 rankings which will be presented the week of January 26th, 2026. 
 
“In 2022 “The Monty Heat Treat News” published a heat treatment industry exclusive, a list of the “10 Largest Single Location Captive Heat Treats” in North America. Since that time changes have occurred and in 2023 we published our list of the “11 Largest Single Location Captive Heat Treats in North America” We are now pleased to offer our 2024 list which has expanded to the “15 Largest Single Location Captive Heat Treats in North America”.
  • Our criteria is simple in that this list only includes single locations and not total heat treating capacity in North America. As an example the ZF Transmission facility in South Carolina makes this list but overall this plant is only a small percentage of the heat treating capacity ZF has in North America.
  • Our estimates are based upon a combination of number of furnaces and throughput. For instance vacuum carburizing cells have a much small throughput than a large pusher furnace-we have tried to take this into account.
  • It is interesting that out of this list of 15, eleven are in the USA, three in Mexico and one in Canada
  • While we do not for a second claim this list is 100% accurate we do claim that it is the most complete list which we have ever come across.