Company lists · Data refreshed September 2026

Top 25 Specialty steel mills based in the United States

Name: Specialty steel mills based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 1,136 companies tracked

RevenueBase identified 1,136 specialty steel mills headquartered in the United States as of September 2026 and tracks 45,738 professional contacts across them, including 12,228 with verified work emails. Houston is the largest hub.

This list covers specialty steel mills 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 18, 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 18, 2026 86% judged on-target in blind review

1,136Companies

45,738Contacts tracked

12,228Verified emails

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The 25 largest specialty steel mills based in the United States

Ranked by team size

Top 25 of 1,136 specialty steel mills based in the United States, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to specialty steel mills: 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	Gerdau North America	Strong evidence	Tampa, FL, United StatesHQ checked Sep 18, 2026	5,001-10,000	2,986 contacts →
	Strong evidence “In North America, Gerdau manufactures merchant bar, structural steel, piling, special bar quality and rebar products for the agricultural, automotive, civil construction…” Source: RevenueBase Database · checked Sep 18, 2026
2	AK Steel Corporation	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 18, 2026	10001+	2,523 contacts →
	Partial evidence “Former AK Steel is now Cleveland-Cliffs.” Source: RevenueBase Database · checked Sep 18, 2026
3	PCC Structurals, INC	Strong evidence	Portland, OR, United StatesHQ checked Sep 18, 2026	10001+	1,318 contacts →
	Strong evidence “PCC Structurals specializes in nickel-based superalloy, titanium, stainless steel, and aluminum investment castings for aerospace, land-based turbine, medical, military armament…” Source: RevenueBase Database · checked Sep 18, 2026
4	Reliance, INC	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 18, 2026	10001+	926 contacts →
	Indirect evidence “Reliance, Inc.(NYSE:RS) is a leading diversified metal solutions provider and the largest metals service center company in North America.” Source: RevenueBase Database · checked Sep 18, 2026
5	Steel Warehouse	Partial evidence	South Bend, IN, United StatesHQ checked Sep 18, 2026	1,001-5,000	917 contacts →
	Partial evidence “Steel Processing requires a finely tuned balance between the awesome strength of large, powerful machinery and the know-how of experienced engineers and operators.” Source: RevenueBase Database · checked Sep 18, 2026
6	A. M. Castle & CO	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 18, 2026	501-1,000	903 contacts →
	Indirect evidence “In 1890, Alfred Martin Castle-a bold, 24-year-old entrepreneur with a vision-set out to solve Chicago’s manufacturing needs.” Source: RevenueBase Database · checked Sep 18, 2026
7	Metals USA	Partial evidence	Tulsa, OK, United StatesHQ checked Sep 18, 2026	1,001-5,000	720 contacts →
	Partial evidence “Metals USA Plates and Shapes offers a wide range of carbon steel, aluminum, and stainless-steel products while providing our customers with world class processing services and…” Source: RevenueBase Database · checked Sep 18, 2026
8	Fort Wayne Metals	Indirect evidence	Fort Wayne, IN, United StatesHQ checked Sep 18, 2026	1,001-5,000	687 contacts →
	Indirect evidence “We are a leading manufacturer of precision wire-based materials and components used in the world's most demanding applications.” Source: RevenueBase Database · checked Sep 18, 2026
9	Charter Steel	Partial evidence	Saukville, WI, United StatesHQ checked Sep 18, 2026	1,001-5,000	657 contacts →
	Partial evidence “Charter Steel is a leading U.S.” Source: RevenueBase Database · checked Sep 18, 2026
10	AM NS Calvert	Partial evidence	Calvert, AL, United StatesHQ checked Sep 18, 2026	1,001-5,000	601 contacts →
	Partial evidence “ArcelorMittal Calvert, located in Calvert, Alabama, about 35 miles north of Mobile, is recognized as one of the most advanced steel finishing facilities in the world.” Source: RevenueBase Database · checked Sep 18, 2026
11	TW Metals LLC	Partial evidence	Exton, PA, United StatesHQ checked Sep 18, 2026	501-1,000	582 contacts →
	Partial evidence “A dynamic and customer-focused organization, TW Metals is a leading specialty metal supplier with over 30 facilities worldwide.” Source: RevenueBase Database · checked Sep 18, 2026
12	BIG River Steel	Indirect evidence	Osceola, AR, United StatesHQ checked Sep 18, 2026	10001+	521 contacts →
	Indirect evidence “U.” Source: RevenueBase Database · checked Sep 18, 2026
13	Metaltek International	Indirect evidence	Waukesha, WI, United StatesHQ checked Sep 18, 2026	501-1,000	506 contacts →
	Indirect evidence “We believe in Making a Lasting Difference.” Source: RevenueBase Database · checked Sep 18, 2026
14	Plymouth Tube Company	Indirect evidence	Warrenville, IL, United StatesHQ checked Sep 18, 2026	501-1,000	383 contacts →
	Indirect evidence “Plymouth Tube Co.” Source: RevenueBase Database · checked Sep 18, 2026
15	Rolled Alloys	Partial evidence	Maumee, OH, United StatesHQ checked Sep 18, 2026	201-500	342 contacts →
	Partial evidence “Rolled Alloys is the global leader in specialty alloys, offering heat and corrosion resistant, aerospace, titanium, and stainless alloys.” Source: RevenueBase Database · checked Sep 18, 2026
16	Yarde Metals	Strong evidence	Southington, CT, United StatesHQ checked Sep 18, 2026	501-1,000	329 contacts →
	Strong evidence “Yarde Metals is a multi-metal service center specializing in aluminum, stainless, carbon steel, brass and copper in a wide range of standard, unique and hard to find sizes.” Source: RevenueBase Database · checked Sep 18, 2026
17	WKW North America, LLC	Partial evidence	Pell City, AL, United StatesHQ checked Sep 18, 2026	201-500	329 contacts →
	Partial evidence “Experience an internationally active and successful aluminum and steel processing company.” Source: RevenueBase Database · checked Sep 18, 2026
18	MPP	Indirect evidence	Indianapolis, PA, United StatesHQ checked Sep 18, 2026	501-1,000	320 contacts →
	Indirect evidence “Metal Powder Products (MPP) is a premier provider of custom-engineered components through powder metallurgy (PM), metal injection molding (MIM), and soft magnetic composites…” Source: RevenueBase Database · checked Sep 18, 2026
19	Energy Alloys Global Solutions	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	501-1,000	303 contacts →
	Partial evidence “EAGS and EAGS-Americas are the only 100% oil and gas focused suppliers of specialty metals to the global oilfield industry.” Source: RevenueBase Database · checked Sep 18, 2026
20	Steel Dynamics Flat Roll Group	Partial evidence	Fort Wayne, IN, United StatesHQ checked Sep 18, 2026	5,001-10,000	294 contacts →
	Partial evidence “The Steel Dynamics Flat Roll Group produces hot-rolled, cold-rolled and coated steel products.” Source: RevenueBase Database · checked Sep 18, 2026
21	Kymera International	Partial evidence	Durham, NC, United StatesHQ checked Sep 18, 2026	1,001-5,000	251 contacts →
	Partial evidence “Kymera International is a leading global specialty metals and coatings manufacturer.” Source: RevenueBase Database · checked Sep 18, 2026
22	Triple-S Steel Holdings, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	1,001-5,000	246 contacts →
	Partial evidence “Triple-S Steel is one of the nation’s largest family-owned steel service center organizations, with more than 50 locations across North America and Colombia.” Source: RevenueBase Database · checked Sep 18, 2026
23	Major Tool & Machine	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 18, 2026	201-500	233 contacts →
	Partial evidence “Established in 1946, Major Tool & Machine started business as a custom job shop specializing in the production of tooling and aircraft ground support equipment and has since…” Source: RevenueBase Database · checked Sep 18, 2026
24	United Performance Metals	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 18, 2026	201-500	219 contacts →
	Partial evidence “United Performance Metals (UPM), an O’Neal Industries affiliate company, is a specialty metals solutions center serving customers in a variety of industries including aerospace…” Source: RevenueBase Database · checked Sep 18, 2026
25	Wall Colmonoy	Indirect evidence	Madison Heights, MI, United StatesHQ checked Sep 18, 2026	201-500	204 contacts →
	Indirect evidence “We melt, coat, join, cast, print and engineer metals.” Source: RevenueBase Database · checked Sep 18, 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: specialty steel mills. 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 specialty steel mills.
Partial evidence: Its own public description names part of specialty steel mills, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name specialty steel mills. 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 1,136 specialty steel mills based in the United States

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Specialty steel mills based in the United States at a glance

As of Sep 18, 2026

26.7%Verified-email coverage

40.3Average contacts per company

11-50Median size (employees)

4.5%Largest-city concentration · Houston

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

268

11-50

422

51-200

297

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,136 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 specialty steel mills, 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 “specialty steel mills”. 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 specialty steel mills), 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 specialty steel mills, 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, 12,228 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 18, 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.

Specialty steel mills by metro

Specialty steel mills in Houston51

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 specialty steel mills, 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 specialty steel mills are there based in the United States?

RevenueBase identified 1,136 specialty steel mills 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?

Gerdau North America, headquartered in Tampa, tops this list with the largest team on record.

Which city has the most specialty steel mills?

Houston leads with 51 headquartered companies, followed by Cleveland (15) and Chicago (9).

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 12,228 verified decision-maker contacts tracked across these 1,136 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 18, 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.