Heavy plate specialist: full-range stock of approx. 60,000 t, cutting up to 600 mm and ready-to-install components
UnionStahl GmbH
Duisburg · GermanyNew on Amplifa
About UnionStahl
UnionStahl GmbH is a partner specialized in heavy plates, headquartered in Duisburg, supplying the international market across the board and employing around 500 people worldwide. The company combines a full-range stock of approximately 60,000 t of heavy plate with its own manufacturing capabilities: on CNC-controlled oxyfuel, plasma and laser cutting systems, flame-cut parts are produced with material thicknesses up to 600 mm, including oversize widths up to 4,000 mm. Secondary processing includes milling, drilling, edging, rolling and welding, including shot-blasted and chamfered versions as well as delivery of ready-to-install components on a just-in-time basis. The product range spans pressure vessel, construction, shipbuilding and offshore steels, high-strength and quenched and tempered steels, through to wear-resistant specialty steels such as Creusabro® and CO₂-reduced products. Customers can be found, among others, in tank and apparatus engineering, wind energy, steel and shipbuilding, mechanical and plant engineering, and the oil and gas industry.
- Site
- Duisburg
- Processes
- Oxyfuel cutting, Plasma cutting, Laser cutting, Flame-cut part manufacturing (CNC-controlled cutting systems) up to material thickness 600 mm, Milling, Drilling, Edging, Rolling
- Materials
- Pressure vessel steels, Steels per ASTM/ASME standard, HIC-resistant plates, Structural steels, Weldable fine-grained structural steels, Shipbuilding steels, Offshore steels, Plates for line/construction pipes
- Certificates
- DIN 2303 Qualification Class 2, DIN 3834-2, DIN EN 1090-2, DIN EN 10204 Inspection Certificates, Ultrasonic testing (DIN EN 10160, ASTM A578/A578M, A435/A435M)
- Founded
- 2002
- Employees
- approx. 500 (worldwi
- Industries
- Tank and apparatus engineering, Wind energy, Steel construction, Offshore and shipbuilding, Construction machinery, Agricultural machinery
- 01
Heavy plate warehousing (full range of approx. 60,000 t)
- 02
Consulting and development support
- 03
CNC cutting (oxyfuel, plasma, laser) up to 600 mm thickness
- 04
Secondary processing: milling, drilling, edging, rolling
- 05
Welding and shot blasting
- 06
Ultrasonic testing and quality documentation
- 07
Just-in-time delivery of ready-to-install components
Materials & Processes
Pressure vessel steels
For tank and apparatus engineering, also available in oversize widths and lengths.
Structural steels
Unalloyed structural steels for load-bearing components in mechanical and structural steel engineering.
Shipbuilding steels
For maritime constructions with tested through-thickness properties.
Offshore steels
For offshore structures with high demands on fracture safety.
High-strength steels
For extremely stressed components such as rack pinions of jack-up rigs.
Wear-resistant steels
Extend the service life of construction machinery and recycling components.
Steels per ASTM/ASME standard
For international applications, including pressure vessels and line pipes.
HIC-resistant plates
For applications with sour gas in the oil and gas industry.
Quenched and tempered steels
For safety-critical welded components in accordance with DIN 2303.
Non-magnetizable austenitic steel
For special safety-relevant applications.
AlZnMg alloys
For welded components with low density, certified in accordance with DIN 2303.
CO₂-reduced steel
For sustainable steel construction, e.g. a pedestrian bridge in Hückelhoven.
Locations
Duisburg
DEHeadquarters, warehousing, cutting and secondary processing
- Materials
- Heavy plate steels up to 600 mm
- CNC-controlled oxyfuel cutting system
- CNC-controlled plasma cutting system
- Bystronic laser cutting system
- Edge processing robot
- Ultrasonic testing equipment
- Crane magnets
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Oxyfuel cuttingMachining | – | 4,000 mm (oversize width) | – | – | Steel (heavy plate), S355J2+N, S690QL1 |
| Plasma cuttingMachining | – | 4,000 mm (oversize width) | – | – | Steel (heavy plate) |
| Laser cuttingMachining | – | 4,000 mm (oversize width) | – | – | Steel (heavy plate) |
| Flame-cut part manufacturing (CNC-controlled cutting systems) up to material thickness 600 mmMachining | – | – | – | – | Steel (heavy plate) |
| MillingMachining | – | – | – | – | Steel |
| DrillingMachining | – | – | – | – | Steel |
| EdgingForming | – | – | – | – | Steel |
| RollingForming | – | – | – | – | Steel |
| Joining | – | – | – | – | Steels, AlZnMg alloys, Liquid quenched and tempered steels (HY 80, HY 100), non-magnetizable austenitic steels (1.3964) |
| Edging (chamfer application) with edge processing robotForming | – | – | – | – | Structural steel S355 |
| Shot blasting (shot-blasted plate cuts)Surface | – | – | – | – | Steel |
| Testing | – | – | – | – | Steel |
| Rack pinion manufacturing (cutting and machining of high-strength plate, e.g. S690QL1 with Z35)Machining | – | – | – | – | S690QL1 |
| Heavy plate warehousing (full-range stock of approx. 60,000 t)Engineering | – | – | approx. 60,000 t stock | – | Heavy plate steels |
5 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| CNC-controlled oxyfuel cutting system | – | – | Material thicknesses up to 600 mm; cuts in oversize widths up to 4,000 mm | – | – |
| CNC-controlled plasma cutting system | – | – | Material thicknesses up to 600 mm | – | – |
| CNC-controlled laser cutting system | Bystronic | – | Material thicknesses up to 600 mm (statement applies to all systems) | – | – |
| Edge processing robot (edging/deburring/chamfering) | UnionStahl (own designation: UnionStahl edge processing robot) | – | – | – | – |
| Ultrasonic testing equipment (manual ultrasonic testing) | – | – | – | – | – |
Additional services
Reference customers
Quality
UnionStahl performs manual ultrasonic testing in accordance with DIN EN 10160 as well as ASTM A578/A578M and ASTM A435/A435M and issues inspection certificates in accordance with DIN EN 10204. For safety-critical welding work, qualifications exist in accordance with DIN 2303 (qualification class 2), DIN 3834-2 and DIN EN 1090-2.
| Evidence | Duisburg |
|---|---|
| DIN 2303 Qualification Class 2 | |
| DIN 3834-2 | |
| DIN EN 1090-2 | |
| DIN EN 10204 Inspection Certificates | |
| Ultrasonic testing (DIN EN 10160, ASTM A578/A578M, A435/A435M) |
History
- 2002
Founding of UnionStahl GmbH with the vision of not only selling plate but developing intelligent solutions around it
- 2010
Start of production of plates and custom flame-cut blanks in oversize width for a renowned customer company on the Lower Rhine
- 2020
After the closure of the customer's cutting, straightening and shot-blasting operation, UnionStahl took over the complete manufacturing and delivery of ready-to-install components
- 2025
Acquisition of DIN 2303 Qualification Class 2 for safety-critical welding work including component class BK1