Company lists · Data refreshed September 2026

Top 25 Heat treat furnace manufacturers based in the United States

Name: Heat treat furnace manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 301 companies tracked

RevenueBase identified 301 heat treat furnace manufacturers headquartered in the United States as of September 2026 and tracks 7,186 professional contacts across them, including 2,715 with verified work emails. Houston is the largest hub.

This list covers heat treat furnace manufacturers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

301Companies

7,186Contacts tracked

2,715Verified emails

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The 25 largest heat treat furnace manufacturers based in the United States

Ranked by team size

Top 25 of 301 heat treat furnace manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to heat treat furnace manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Thermon	Indirect evidence	Austin, TX, United StatesHQ checked Sep 30, 2026	1,001-5,000	901 contacts →
	Indirect evidence “Industrial Process Heating Solutions Through its global network, Thermon provides safe, reliable and innovative mission critical industrial process heating solutions.” Source: RevenueBase Database · checked Sep 30, 2026
2	Superheat	Indirect evidence	New Lenox, IL, United StatesHQ checked Sep 30, 2026	501-1,000	376 contacts →
	Indirect evidence “Superheat was founded on the principle that cutting-edge technology can offer a Better.” Source: RevenueBase Database · checked Sep 30, 2026
3	Inductotherm Group	Partial evidence	Rancocas, NJ, United StatesHQ checked Sep 30, 2026	1,001-5,000	375 contacts →
	Partial evidence “WE BRING HEAT TO METAL.” Source: RevenueBase Database · checked Sep 30, 2026
4	Ajaxtocco Magnethermic	Partial evidence	Warren, OH, United StatesHQ checked Sep 30, 2026	201-500	234 contacts →
	Partial evidence “Ajax TOCCO Magnethermic® designs and manufactures world class induction heating and melting equipment for various industries and applications throughout the world.” Source: RevenueBase Database · checked Sep 30, 2026
5	BTU International	Indirect evidence	Westford, MA, United StatesHQ checked Sep 30, 2026	201-500	218 contacts →
	Indirect evidence “BTU International, a wholly-owned subsidiary of Amtech Group (Nasdaq: ASYS), is a global supplier and technology leader of advanced thermal processing equipment solutions in the…” Source: RevenueBase Database · checked Sep 30, 2026
6	Analytic Stress Relieving LLC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 30, 2026	201-500	190 contacts →
	Indirect evidence “Analytic Stress made a commitment to quality, safety, and the customer when the company started in the Fall of 1979.” Source: RevenueBase Database · checked Sep 30, 2026
7	Aalberts Surface Technologies	Partial evidence	St. Louis, MO, United StatesHQ checked Sep 30, 2026	201-500	182 contacts →
	Partial evidence “Aalberts surface technologies - Paulo, delivers precision heat treating and thermal processing services that push the boundaries of what’s possible in metallurgical science.” Source: RevenueBase Database · checked Sep 30, 2026
8	Petro-Chem Development Co., INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	501-1,000	127 contacts →
	Partial evidence “Petro-Chem Development Co, Inc (PCD) was founded in 1939 and has been recognized as a leader in the design and production of fired heaters and furnaces.” Source: RevenueBase Database · checked Sep 30, 2026
9	Consarc Corporation	Indirect evidence	Rancocas, NJ, United StatesHQ checked Sep 30, 2026	51-200	114 contacts →
	Indirect evidence “We have considerable experience in supplying custom-built equipment to suit highly specialized or individual requirements, enabling us to provide a comprehensive service and…” Source: RevenueBase Database · checked Sep 30, 2026
10	Solar Atmospheres, INC	Partial evidence	Souderton, PA, United StatesHQ checked Sep 30, 2026	201-500	109 contacts →
	Partial evidence “Solar Atmospheres is one of the world’s largest providers of commercial vacuum heat treating services.” Source: RevenueBase Database · checked Sep 30, 2026
11	Despatch - ITW EAE	Indirect evidence	Lakeville, MN, United StatesHQ checked Sep 30, 2026	51-200	109 contacts →
	Indirect evidence “Despatch is a member of ITW EAE, a division of Illinois Tools Works, Inc, and has specialized in thermal processing for over 100 years and is actively using this technical…” Source: RevenueBase Database · checked Sep 30, 2026
12	Thermal Product Solutions	Strong evidence	New Columbia, PA, United StatesHQ checked Sep 30, 2026	51-200	107 contacts →
	Strong evidence “Thermal Product Solutions (TPS) designs and manufactures industrial and laboratory ovens and furnaces, and environmental temperature cycling and stability test chambers.” Source: RevenueBase Database · checked Sep 30, 2026
13	Retech A Seco Warwick Company	Indirect evidence	Buffalo, NY, United StatesHQ checked Sep 30, 2026	51-200	98 contacts →
	Indirect evidence “Since 1963, Retech has been a global leader in the supply of metallurgical processing equipment for demanding industries in ever-changing markets.” Source: RevenueBase Database · checked Sep 30, 2026
14	Afc-Holcroft	Partial evidence	Wixom, MI, United StatesHQ checked Sep 30, 2026	51-200	86 contacts →
	Partial evidence “Global supplier of industrial Heat Treating Equipment, serving a variety of markets worldwide.” Source: RevenueBase Database · checked Sep 30, 2026
15	Braddock Metallurgical	Strong evidence	Daytona Beach, FL, United StatesHQ checked Sep 30, 2026	51-200	85 contacts →
	Strong evidence “We are a commercial heat treater that processes parts for a wide variety of manufacturers and industries.” Source: RevenueBase Database · checked Sep 30, 2026
16	Inductoheat	Indirect evidence	Madison Heights, MI, United StatesHQ checked Sep 30, 2026	201-500	84 contacts →
	Indirect evidence “We design, build and repair high-quality general purpose, turn-key, and fully automated induction heating equipment.” Source: RevenueBase Database · checked Sep 30, 2026
17	Harper International Corporation	Partial evidence	Buffalo, NY, United StatesHQ checked Sep 30, 2026	51-200	84 contacts →
	Partial evidence “Harper International is a global leader in complete thermal processing solutions and technical services for the production of advanced materials, including Furnaces, Kilns…” Source: RevenueBase Database · checked Sep 30, 2026
18	Inductotherm Corp	Partial evidence	Rancocas, NJ, United StatesHQ checked Sep 30, 2026	201-500	80 contacts →
	Partial evidence “We design and manufacture the most advanced induction melting, heating, holding and pouring systems for virtually all metal and material processing.” Source: RevenueBase Database · checked Sep 30, 2026
19	Specialty Steel Treating	Partial evidence	Fraser, MI, United StatesHQ checked Sep 30, 2026	51-200	77 contacts →
	Partial evidence “Specialty Steel Treating, founded 1956, has been performing precision heat treating for more than 60 years.” Source: RevenueBase Database · checked Sep 30, 2026
20	Sigma Thermal, INC	Indirect evidence	Marietta, GA, United StatesHQ checked Sep 30, 2026	51-200	75 contacts →
	Indirect evidence “Sigma Thermal designs, engineers, supplies, and services process heating systems for industry.” Source: RevenueBase Database · checked Sep 30, 2026
21	Consolidated Engineering Company	Indirect evidence	Kennesaw, GA, United StatesHQ checked Sep 30, 2026	51-200	75 contacts →
	Indirect evidence “Welcome to CEC!” Source: RevenueBase Database · checked Sep 30, 2026
22	Thermtech Of Waukesha, INC	Partial evidence	Waukesha, WI, United StatesHQ checked Sep 30, 2026	51-200	69 contacts →
	Partial evidence “A privately held, commercial heat-treating company, ThermTech provides value added services to the Forging, Foundry, Machining, and Tool & Die markets.” Source: RevenueBase Database · checked Sep 30, 2026
23	Gillespie & Powers, INC	Partial evidence	St. Louis, MO, United StatesHQ checked Sep 30, 2026	51-200	68 contacts →
	Partial evidence “INDUSTRIAL FURNACES Aluminum Furnace Experts.” Source: RevenueBase Database · checked Sep 30, 2026
24	Heattek	Partial evidence	Ixonia, WI, United StatesHQ checked Sep 30, 2026	51-200	66 contacts →
	Partial evidence “In some of the brightest minds in the oven and heat-treating industry combined hundreds of years of experience to form HeatTek.” Source: RevenueBase Database · checked Sep 30, 2026
25	Surface Combustion, INC	Strong evidence	Maumee, OH, United StatesHQ checked Sep 30, 2026	51-200	63 contacts →
	Strong evidence “Surface Combustion provides a single source for atmosphere and vacuum heat treatment furnaces for the global manufacturing company.” Source: RevenueBase Database · checked Sep 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: heat treat furnace manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names heat treat furnace manufacturers.
Partial evidence: Its own public description names part of heat treat furnace manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name heat treat furnace manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 301 heat treat furnace manufacturers based in the United States

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Heat treat furnace manufacturers based in the United States at a glance

As of Sep 30, 2026

37.8%Verified-email coverage

23.9Average contacts per company

11-50Median size (employees)

2.7%Largest-city concentration · Houston

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

120

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 301 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among heat treat furnace manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “heat treat furnace manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names heat treat furnace manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among heat treat furnace manufacturers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 2,715 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names heat treat furnace manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many heat treat furnace manufacturers are there based in the United States?

RevenueBase identified 301 heat treat furnace manufacturers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Thermon, headquartered in Austin, tops this list with the largest team on record.

Which city has the most heat treat furnace manufacturers?

Houston leads with 8 headquartered companies, followed by Warren (8) and Cleveland (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,715 verified decision-maker contacts tracked across these 301 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.