Company lists · Data refreshed September 2026

Top 25 Structural steel manufacturers based in Türkiye

Name: Structural steel manufacturers based in Türkiye
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 375 companies tracked

RevenueBase identified 375 structural steel manufacturers headquartered in Türkiye as of September 2026 and tracks 5,891 professional contacts across them, including 911 with verified work emails. Istanbul is the largest hub.

This list covers structural steel manufacturers headquartered in Türkiye, 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

375Companies

5,891Contacts tracked

911Verified emails

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The 25 largest structural steel manufacturers based in Türkiye

Ranked by team size

Top 25 of 375 structural steel manufacturers based in Türkiye, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to structural steel 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	Izmir Demir Celik IDC Steel	Partial evidence	Izmir, TürkiyeHQ checked Sep 18, 2026	1,001-5,000	563 contacts →
	Partial evidence “IDC Steel is one of the leading long steel producers in Turkey with 1,5 million tons crude steel capacity annually.” Source: RevenueBase Database · checked Sep 18, 2026
2	Kocaer Steel	Partial evidence	İzmir, TürkiyeHQ checked Sep 18, 2026	1,001-5,000	341 contacts →
	Partial evidence “Operating in the steel profile segment of the iron and steel industry, Kocaer Steel is the export champion of the Aegean Region in the iron and steel industry with foreign…” Source: RevenueBase Database · checked Sep 18, 2026
3	Kroman Çelik San. A.Ş	Indirect evidence	Kocaeli, TürkiyeHQ checked Sep 18, 2026	1,001-5,000	314 contacts →
	Indirect evidence “1966 yılında demir çelik ürünleri imalatı ve ticareti yapmak amacıyla kurulan Kroman Çelik Kroman Çelik, 1985 yılında Yücel Grup bünyesine katılmıştır.” Source: RevenueBase Database · checked Sep 18, 2026
4	Yıldız Demir Çelik	Indirect evidence	İzmit, TürkiyeHQ checked Sep 18, 2026	501-1,000	310 contacts →
	Indirect evidence “Yıldız Demir Çelik, Türkiye'de ve dünyada büyük yatırımlara imza atan Yıldızlar Yatırım Holding’in grup iştirakidir.” Source: RevenueBase Database · checked Sep 18, 2026
5	Kardemir Çelik Sanayi A.Ş	Indirect evidence	Denizli, TürkiyeHQ checked Sep 18, 2026	1,001-5,000	300 contacts →
	Indirect evidence “1968 yılında Denizli’deki ilk üretim tesisi ile sanayi yolculuğuna başlayan Kardemir Çelik, bugün 1350’nin üzerinde çalışanı, İzmir ve Denizli’de 7 adet üretim tesisi ve uzun…” Source: RevenueBase Database · checked Sep 18, 2026
6	Özkan Steel	Partial evidence	Izmir, TürkiyeHQ checked Sep 18, 2026	501-1,000	233 contacts →
	Partial evidence “ÖZKAN Steel was founded in 1953 and has its headquarter and production sites in İzmir-Aliağa over an area of ÖZKAN Steel, having a melting capacity of tons and rolling capacity of…” Source: RevenueBase Database · checked Sep 18, 2026
7	Tezcan Galvaniz	Indirect evidence	Kocaeli-kartepe, TürkiyeHQ checked Sep 18, 2026	501-1,000	141 contacts →
	Indirect evidence “Dikey büyümeyi hedefleyen ve bu anlayışla entegrasyona yönelik yatırımlarına aralıksız devam eden Tezcan A.Ş, yılda 1.3 milyon ton yassı mamul üretim hacmine sahip olup, yüksek…” Source: RevenueBase Database · checked Sep 18, 2026
8	Yilgenci̇ TR	Partial evidence	Sakarya, TürkiyeHQ checked Sep 18, 2026	201-500	111 contacts →
	Partial evidence “We specialise in steel trading and custom-welded fabrication of chassis, frames, and components for rail systems, trailers, construction equipment, and more.” Source: RevenueBase Database · checked Sep 18, 2026
9	Mescier Steel Industry&trade Company	Partial evidence	Karabük, TürkiyeHQ checked Sep 18, 2026	1,001-5,000	91 contacts →
	Partial evidence “Mescier Steel Industry & Trade Co.” Source: RevenueBase Database · checked Sep 18, 2026
10	Gulermak Steel Construction Ind. & Trade Co. INC	Partial evidence	Izmir, TürkiyeHQ checked Sep 18, 2026	501-1,000	91 contacts →
	Partial evidence “GULERMAK Steel Construction Ind.” Source: RevenueBase Database · checked Sep 18, 2026
11	Atak Engineering	Indirect evidence	Ankara, TürkiyeHQ checked Sep 18, 2026	501-1,000	75 contacts →
	Indirect evidence “Atak Engineering was founded in 1988.” Source: RevenueBase Database · checked Sep 18, 2026
12	Karçel A.Ş	Indirect evidence	Karabük, TürkiyeHQ checked Sep 18, 2026	201-500	73 contacts →
	Indirect evidence “Yaklaşık olarak m2 lik kapalı alana ve m2 lik açık alana sahip fabrikamız;Cnc, Elektronik, Mekanik ve Hidrolik modern tezgahlarla techiz edilmiş olarak bugün sahasında Türkiye'nin…” Source: RevenueBase Database · checked Sep 18, 2026
13	Albayrak Demir Çelik	Indirect evidence	Samsun, TürkiyeHQ checked Sep 18, 2026	201-500	64 contacts →
	Indirect evidence “Albayrak Demir Çelik, 1980 yılında aile şirketi olarak kurulmuştur.” Source: RevenueBase Database · checked Sep 18, 2026
14	Isik Steel	Partial evidence	Karabük, TürkiyeHQ checked Sep 18, 2026	201-500	56 contacts →
	Partial evidence “ISIK STEEL founded in 1965 with the goal of building a prosperous future for all, aims to create steel products that are core of contemporary architecture.” Source: RevenueBase Database · checked Sep 18, 2026
15	Çelsantaş Çelik Mamülleri San. VE Ticaret A.Ş	Indirect evidence	Karabük, TürkiyeHQ checked Sep 18, 2026	51-200	48 contacts →
	Indirect evidence “1979 yılında faaliyetlerine başlayan Çelsantaş Çelik Mamülleri, 50 yılı aşkın süredir demir çelik sektöründe faaliyetlerine devam eden Yücel Grup bünyesinde yer almaktadır.” Source: RevenueBase Database · checked Sep 18, 2026
16	Apec Steel Construction	Strong evidence	Istanbul, TürkiyeHQ checked Sep 18, 2026	201-500	47 contacts →
	Strong evidence “APEC Smart Steel Structures is a group of companies operating in the field of engineering, manufacturing, construction and real estate development.” Source: RevenueBase Database · checked Sep 18, 2026
17	Çelikerler Çelik Konstrüksiyon İnşaat San. Tic. Ltd. ŞTI	Indirect evidence	Merkez, TürkiyeHQ checked Sep 18, 2026	51-200	46 contacts →
	Indirect evidence “Bartın Kumluca’da 1844 yılında sıcak demircilik ile iş hayatına başlayan Çelikerler, 2003 yılında şirketleşerek ÇELİKERLER LTD.” Source: RevenueBase Database · checked Sep 18, 2026
18	Rönesans Çelik	Partial evidence	Ankara, TürkiyeHQ checked Sep 18, 2026	201-500	42 contacts →
	Partial evidence “Rönesans Steel Construction Industry & Trade Inc.” Source: RevenueBase Database · checked Sep 18, 2026
19	Polarkon	Partial evidence	Çankaya, TürkiyeHQ checked Sep 18, 2026	51-200	40 contacts →
	Partial evidence “Founded in 1995 and headquartered in Ankara, Turkey, with global offices in Düsseldorf, Germany, and Chicago, Illinois, POLARKON is a leading "design-build" engineering and steel…” Source: RevenueBase Database · checked Sep 18, 2026
20	Uslu Demir Çelik	Partial evidence	Samsun, TürkiyeHQ checked Sep 18, 2026	11-50	31 contacts →
	Partial evidence “Uslu Demir Çelik is among the most reputable companies in the steel industry with its strong capital, its reliability and its fast and high-quality service.” Source: RevenueBase Database · checked Sep 18, 2026
21	IS Yapi	Strong evidence	Izmir, TürkiyeHQ checked Sep 18, 2026	51-200	29 contacts →
	Strong evidence “We are specialized in steel structures and fixing systems in all kinds of steel.” Source: RevenueBase Database · checked Sep 18, 2026
22	Cel-Mer Steel Company	Strong evidence	Kocaeli, TürkiyeHQ checked Sep 18, 2026	51-200	28 contacts →
	Strong evidence “We would like to introduce ourselves one of the lead steel manufacturer & trader in TURKEY.” Source: RevenueBase Database · checked Sep 18, 2026
23	Monosteel	Partial evidence	Sakarya, TürkiyeHQ checked Sep 18, 2026	51-200	28 contacts →
	Partial evidence “Mono Steel is a Turkish manufacturing and construction company established in 2012.” Source: RevenueBase Database · checked Sep 18, 2026
24	Aldem Çelik Endüstri Sanayi VE Ticaret A.Ş	Strong evidence	Esentepe, TürkiyeHQ checked Sep 18, 2026	51-200	27 contacts →
	Strong evidence “Founded in 1984, Aldem Çelik is a trusted manufacturer of welded and non-welded components made from carbon steel, stainless steel, aluminum, and structural steel.” Source: RevenueBase Database · checked Sep 18, 2026
25	NET Haddeci̇li̇k San. Ti̇c. Ltd. Şti̇	Partial evidence	Payas, TürkiyeHQ checked Sep 18, 2026	51-200	27 contacts →
	Partial evidence “We are proud to produce Turkey's high quality, economic and fast erected iron & steel products to the world market with best service and support to meet customer expectations and…” 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: structural steel 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 structural steel manufacturers.
Partial evidence: Its own public description names part of structural steel manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name structural steel 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 375 structural steel manufacturers based in Türkiye

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Structural steel manufacturers based in Türkiye at a glance

As of Sep 18, 2026

15.5%Verified-email coverage

15.7Average contacts per company

11-50Median size (employees)

14.1%Largest-city concentration · Istanbul

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

11-50

138

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Türkiye, so it is reported there. Company counts and contact totals on this page are exact for Türkiye, over 375 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 structural steel 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 Türkiye whose own description of what they do matches “structural steel 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 structural steel 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 structural steel manufacturers, and records with no verified work email. Companies headquartered outside Türkiye 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, 911 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.

Structural steel manufacturers by metro

Structural steel manufacturers in Istanbul53
Structural steel manufacturers in Ankara33
Structural steel manufacturers in Kocaeli29

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 structural steel 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 structural steel manufacturers are there based in Türkiye?

RevenueBase identified 375 structural steel manufacturers headquartered in Türkiye 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?

Izmir Demir Celik IDC Steel, headquartered in Izmir, tops this list with the largest team on record.

Which city has the most structural steel manufacturers?

Istanbul leads with 53 headquartered companies, followed by Ankara (33) and Kocaeli (29).

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 911 verified decision-maker contacts tracked across these 375 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.