What Unionstahl does

UnionStahl GmbH is a Duisburg, Germany-headquartered privately held heavy plate steel specialist serving European industrial B2B customers across offshore and shipbuilding, steel construction, wind energy, pressure vessel and apparatus construction, mechanical engineering, construction and agricultural machinery, crane construction, mining, pipeline construction, tool manufacturing, and railway technology. The company operates what it describes as Europe's only full-range heavy plate warehouse (Vollsortimentlager) with approximately 60,000 tonnes of inventory spanning pressure vessel, structural, wear-resistant, offshore (EN 10225 / NORSOK), ASTM/ASME, HIC-resistant, high-strength, tempering, case-hardening, and ballistic grades, including the proprietary toughcore® brand and exclusively distributed Creusabro® line. With approximately 500 employees, UnionStahl was founded around 2002 and is managed by Oliver Hillekamp and Norman Sandrock as Managing Directors.

The technical core is CNC-controlled cutting and processing of heavy plate up to 600 mm material thickness, combining autogenous oxyfuel flame cutting, plasma cutting, and laser cutting with in-house secondary processing — milling, drilling, edge processing (kanting), rolling, welding, and weld seam preparation — to deliver ready-to-install components. Operational scale is anchored by close procurement partnerships with all European heavy plate manufacturers, a 60,000-tonne Duisburg warehouse complex (Halls 1–6 plus administration), multilingual (DE/EN/FR/PT/ES) digital presence, an educational "Steel School" content platform, and trade-fair participation including IFAT.

Commercial activity is run on a direct enterprise field-sales model with highly qualified technical and commercial consulting and quote-based B2B pricing; no intermediary distribution channels are indicated. Revenue mechanics consist of one-time heavy plate sales plus per-project processing services, with no subscription, SaaS, or recurring software revenue streams disclosed. The disclosed customer-base scale signals are indirect: the company serves 12 vertical markets with no named end-customer logos, and pricing is fully project-quoted with no public rate card.

Name

Unionstahl

Legal name

UnionStahl GmbH

Website

https://unionstahl.com

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

251–500 employees

Short description

UnionStahl GmbH is a Duisburg-headquartered heavy plate steel specialist serving European industrial B2B customers across offshore, wind, construction, pressure vessel, and machinery sectors from a 60,000-tonne full-range warehouse with in-house CNC cutting, secondary processing, and ready-to-install component production.

Ownership category

akta.pro rank

Headquarters

HQ city

Duisburg

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Heavy Plate Sales: Sale of heavy plate steel (Grobblech) from full-range warehouse inventory including pressure vessel steels, structural steels, wear-resistant steels, offshore steels, and specialty grades
2. Cutting and Processing Services: CNC cutting (oxyfuel, plasma, laser) and secondary processing (milling, drilling, edge processing, rolling, welding) of heavy plates to customer specifications
3. Ready-to-Install Components: Delivery of fully processed, ready-to-install steel components manufactured from customer-specific heavy plate orders

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels8 records

Core offering

Unionstahl operates one of Europe's largest full-range heavy plate warehouses, holding roughly 60,000 tonnes of stock across 26 grades of mild, high-strength, wear-resistant, and armor-grade steel. The company sells steel plates, blanks, and cut components to industrial buyers and provides CNC-controlled cutting (oxyfuel, plasma, laser), milling, drilling, bending, and weld-seam preparation as in-house processing services. Deliveries are made as ready-to-install parts direct to plant sites across Europe.

Product overview

UnionStahl operates as Europe's leading heavy plate specialist, offering a comprehensive full-range warehouse (Vollsortimentlager) with approximately 60,000 tonnes of heavy plate inventory. The company provides both standardized steel products across 15 major categories (including pressure vessel steels, structural steels, wear-resistant steels such as Creusabro® and toughcore®, offshore steels, high-strength steels, and ballistic steels) and value-added processing services including CNC-controlled autogenous, plasma, and laser cutting (up to 600mm thickness), milling, drilling, edge processing, rolling, and welding. The product portfolio spans from standard structural grades to specialized branded products, supported by comprehensive technical consulting and delivery of ready-to-install components.

Differentiator

Problem solved

Functional benefit

Products and services

• Heavy plate steel (mild, high-strength, wear-resistant, armor)

Segments12 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• All European Heavy Plate ManufacturerscoreStrategic or Co-development PartnerClose, partnership-based relationships with all European heavy plate manufacturers. These partnerships ensure UnionStahl can offer the full range of heavy plate grades and specifications from a single source, with reliable supply chains and access to specialized products.

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Klöckner & Co: One of Europe's largest steel and metal distribution groups with multi-metal service centers across the continent. Operates a broadly similar metal service center model to UnionStahl but at significantly larger scale and across multiple product categories beyond heavy plate.
• Salzgitter AG (Ilsenburger Grobblech): German steel group whose Ilsenburger Grobblech division is one of Europe's heavy plate specialists serving similar end markets (shipbuilding, structural, offshore). Operates at much larger group scale with integrated steelmaking that creates partial supply-chain overlap with UnionStahl.
• Voestalpine Steel Division: Austrian steel group with significant heavy plate production for shipbuilding, offshore, and pressure vessel applications. Overlaps with UnionStahl on grades, customer industries, and geographic reach across DACH and broader Europe.
• SSAB: Nordic steel producer with leading positions in heavy plate, wear-resistant (Hardox), and high-strength structural grades. Comparable to UnionStahl on heavy plate product positioning and end markets (mining, construction equipment, offshore), with strong branded product parallels (Hardox vs. Creusabro/toughcore).
• Thyssenkrupp Steel Europe: One of Europe's largest flat steel producers with significant heavy plate capacity serving construction, machinery, and energy markets. Operates at a fundamentally different scale than UnionStahl but overlaps on customer industries and grade categories.
• ArcelorMittal Europe Flat Products: World's largest steel producer with substantial heavy plate output serving shipbuilding, offshore wind, and construction. Represents both a major upstream supplier to UnionStahl and a potential bypass competitor for direct end-customer supply.

Direct peers

• AG der Dillinger Hüttenwerke: German heavy plate manufacturer with deep specialization in shipbuilding, offshore, pressure vessel, and structural grades. Directly comparable to UnionStahl on product mix and customer overlap, though Dillinger produces plate while UnionStahl distributes and processes third-party mill output.
• Wickeder Westfalenstahl: German specialty steel service center focused on heat-treated, high-strength, and wear-resistant plate products. Comparable to UnionStahl on specialization in niche heavy plate grades, value-added processing, and mid-sized industrial customer base.
• Böllinghaus Steel: German manufacturer and distributor of specialty stainless and high-alloy long products with a similar mid-size B2B industrial service model. Comparable to UnionStahl in scale, geographic focus, and emphasis on qualified specialty grades for engineered applications.
• Ovako: European specialty steel producer and distributor with focus on engineering steel for bearings, transmission, and heavy machinery. Similar mid-market European service center model serving industrial OEMs, with comparable emphasis on technical consultation and qualified grades.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks3 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/unionstahl
• Instagraminstagram.com/unionstahl

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Unionstahl