Company lists · Data refreshed September 2026

Top 25 Annealing service providers based in Germany

RevenueBase identified 74 annealing service providers headquartered in Germany as of September 2026 and tracks 608 professional contacts across them, including 206 with verified work emails. Simmerath is the largest hub.

This list covers annealing service providers headquartered in Germany, 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 19, 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 19, 2026 86% judged on-target in blind review
74Companies
608Contacts tracked
206Verified emails
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The 25 largest annealing service providers based in Germany

Ranked by team size
Top 25 of 74 annealing service providers based in Germany, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to annealing service providers: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceSimmerath, GermanyHQ checked Sep 19, 2026501-1,000125 contacts →

Indirect evidence

“Our success story goes back to the year 1924 when Otto Junker founded OTTO JUNKER GmbH and startet to build water-cooled moulds for making brass rolling slabs - an invention of…”

Source: RevenueBase Database · checked Sep 19, 2026
2Indirect evidenceRemscheid, GermanyHQ checked Sep 19, 2026201-50059 contacts →

Indirect evidence

“In-depth know-how of and decades of experience in industrial heating and heat treatment of metals through induction, applied to enable our customers to realize better bottom lines…”

Source: RevenueBase Database · checked Sep 19, 2026
3Indirect evidenceAlsdorf, GermanyHQ checked Sep 19, 2026201-50055 contacts →

Indirect evidence

“We improve what matters.”

Source: RevenueBase Database · checked Sep 19, 2026
4Indirect evidenceHannover, GermanyHQ checked Sep 19, 2026501-1,00032 contacts →

Indirect evidence

“Die Hanomag Lohnhärterei ist aus der ehemaligen Betriebshärterei der Hannoverschen Maschinenbau AG -kurz Hanomag- hervorgegangen und blickt somit auf eine lange Tradition in der…”

Source: RevenueBase Database · checked Sep 19, 2026
5Indirect evidenceBochum, GermanyHQ checked Sep 19, 2026201-50027 contacts →

Indirect evidence

“Präzisionstechnologie braucht Wärmebehandlung.”

Source: RevenueBase Database · checked Sep 19, 2026
6Indirect evidenceWitten, GermanyHQ checked Sep 19, 2026201-50022 contacts →

Indirect evidence

“Die VTN-Gruppe ist ein führender Anbieter von Wärmebehandlungen mit einem breiten Portfolio unterschiedlichster Technologien.”

Source: RevenueBase Database · checked Sep 19, 2026
7Indirect evidenceUlm, GermanyHQ checked Sep 19, 2026501-1,00022 contacts →

Indirect evidence

“Die SHU Schwäbische Härtetechnik ist Deutschlands größte inhabergeführte Lohnhärterei an einem Standort.”

Source: RevenueBase Database · checked Sep 19, 2026
8Indirect evidenceEschenbach, GermanyHQ checked Sep 19, 202651-20014 contacts →

Indirect evidence

“Egal ob für die Automobilindustrie oder die Luft- und Raumfahrttechnik, ob Equipment für Wanderausrüstungen oder E-Bikes, unsere Dienstleistungen finden in vielen Bereichen…”

Source: RevenueBase Database · checked Sep 19, 2026
9Indirect evidenceGammertingen-harthausen, GermanyHQ checked Sep 19, 202651-2009 contacts →

Indirect evidence

“Spezialhärterei für Werkzeug- und Formenbau, Maschinen- und Anlagenbau, Medizintechnik, Lebensmittelindustrie, Luft- und Raumfahrt.”

Source: RevenueBase Database · checked Sep 19, 2026
10Indirect evidenceHilchenbach, GermanyHQ checked Sep 19, 202651-2007 contacts →

Indirect evidence

“Company LOECHER is a famous german builder of industrial furnaces with more than 55 years of experience for the metalworking industry, especially forging plants and for several…”

Source: RevenueBase Database · checked Sep 19, 2026
11Indirect evidenceDelbrück, GermanyHQ checked Sep 19, 202651-2005 contacts →

Indirect evidence

“With innovative heat treatment processes, we optimise the material properties of the components, allowing them to be used in a wide range of areas – even replacing steel.”

Source: RevenueBase Database · checked Sep 19, 2026
12Indirect evidenceErbach, GermanyHQ checked Sep 19, 20261-105 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
13Indirect evidenceWerdohl, GermanyHQ checked Sep 19, 20261-105 contacts →

Indirect evidence

“Härterei Kirchhoff GmbH is a company based out of Werdohl, North Rhine-Westphalia, Germany.”

Source: RevenueBase Database · checked Sep 19, 2026
14Indirect evidenceEssen, GermanyHQ checked Sep 19, 202611-504 contacts →

Indirect evidence

“Seit über 30 Jahren sind wir Ihr zuverlässiger Partner für anspruchsvolle Wärmebehandlungsprozesse.”

Source: RevenueBase Database · checked Sep 19, 2026
15Indirect evidenceLüdenscheid, GermanyHQ checked Sep 19, 202651-2004 contacts →

Indirect evidence

“Hertwig Härtetechnik beschäftigt 120 Mitarbeiter an zwei Standorten in Lüdenscheid und ist der zuverlässige Partner in Wärmebehandlungsfragen für den Werkzeug- und Maschinenbau.”

Source: RevenueBase Database · checked Sep 19, 2026
16Indirect evidenceEssingen, GermanyHQ checked Sep 19, 202611-504 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
17Indirect evidenceBrackenheim, GermanyHQ checked Sep 19, 20261-104 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
18Indirect evidenceToppenstedt, GermanyHQ checked Sep 19, 202651-2003 contacts →

Indirect evidence

“Stahlhärterei Haupt GmbH is a company based out of 16 Quarrendorfer Weg, Toppenstedt, Lower Saxony, Germany.”

Source: RevenueBase Database · checked Sep 19, 2026
19Indirect evidenceLübeck, GermanyHQ checked Sep 19, 202611-503 contacts →

Indirect evidence

“Sciprotec IPE GmbH is a specialist in energy-efficient industrial furnace systems for advanced heat treatment processes.”

Source: RevenueBase Database · checked Sep 19, 2026
20Indirect evidenceWetter, GermanyHQ checked Sep 19, 202651-2003 contacts →

Indirect evidence

“Die KGO verfügt über mehr als 75 Jahre Erfahrung in der Fertigung von Stahlkonstruktionen jeglicher Art, speziell von Ofengehäusen für die industrielle Wärmebehandlung von…”

Source: RevenueBase Database · checked Sep 19, 2026
21Indirect evidenceArnstadt, GermanyHQ checked Sep 19, 20261-103 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
22Indirect evidenceErkelenz, GermanyHQ checked Sep 19, 202611-502 contacts →

Indirect evidence

“Wir sind die Spezialisten für die Wärmebehandlung und Oberflächentechnik von Stahlbauteilen.”

Source: RevenueBase Database · checked Sep 19, 2026
23Indirect evidenceGevelsberg, GermanyHQ checked Sep 19, 202611-502 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
24Indirect evidenceHöchheim, GermanyHQ checked Sep 19, 20261-101 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
25Indirect evidenceWeinstadt, GermanyHQ checked Sep 19, 20261-101 contacts →

Indirect evidence

“Ob Einsatzhärten, Vergüten, Brünieren oder Entgraten: Wir sorgen mit der richtigen Behandlung für den gewünschten Härtegrad bzw.”

Source: RevenueBase Database · checked Sep 19, 2026

Showing 25 of 74 annealing service providers based in Germany

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Annealing service providers based in Germany at a glance

As of Sep 19, 2026
33.9%Verified-email coverage
8.2Average contacts per company
11-50Median size (employees)
4.1%Largest-city concentration · Simmerath
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
26
11-50
21
51-200
17
201-500
5
501-1,000
3

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 74 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 annealing service providers, 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 Germany whose own description of what they do matches “annealing service providers”. 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 annealing service providers), 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 annealing service providers, and records with no verified work email. Companies headquartered outside Germany 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, 206 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 19, 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 annealing service providers, 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 annealing service providers are there based in Germany?

RevenueBase identified 74 annealing service providers headquartered in Germany 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?

Otto Junker Gmbh, headquartered in Simmerath, tops this list with the largest team on record.

Which city has the most annealing service providers?

Simmerath leads with 3 headquartered companies, followed by Bonen (2) and Erbach (2).

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 206 verified decision-maker contacts tracked across these 74 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 19, 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.