The Monty’s 50 Largest North American Commercial Heat Treats 2021 – #14 Dowa Thermotech Mexico

​​​Since 1999 “The Monty” has been publishing annually a list of the largest commercial heat treaters in North America based upon annual sales, our 2021 list can be found at This year readers will see we became much more ambitious and expanded the list to the 50 largest. In our 14th spot we have Dowa Thermotech Mexico.

Globally Japan based Dowa Thermotech is one of the largest commercial heat treaters in the world so it is no surprise that it also ranks as one of the largest in North America. Their facilities in San Luis Potosi, Mexico and Bowling Green, Kentucky are both dedicated to servicing the Japanese automakers. It is difficult to say exactly what their sales are, however based upon what we know about their capabilities it is quite possible that the company deserves a higher ranking than what we are suggesting today.

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