CELSA Group
A European steelmaking group focused on reinforcement steel, long steel products, and circular, lower-emissions steel made by recycling ferrous scrap in electric arc furnaces.
Last updated October 16, 2026
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Overview
CELSA Group is a Spanish multinational steelmaking group headquartered in Castellbisbal, near Barcelona. Its principal activity is the manufacture of steel reinforcement products, especially rebar and related long-steel products used in construction and infrastructure. The group developed from Compañía Española de Laminación, established in 1967, and grew into a network of steel companies operating across several European markets. The business is organized around multiple regional steel operations rather than a single consumer-facing product brand. Its activities include the processing and manufacture of reinforcement steel, the production of other long steel products, and the movement and use of ferrous scrap as an important raw material. The group’s European footprint includes operations in Spain and the United Kingdom, among other markets. Its structure is described as comprising eight principal steel companies distributed across Europe. CELSA’s operating model is closely linked to the circular use of steel. Scrap steel is a significant input for electric-arc-furnace production and is transported into the group’s facilities for conversion into new steel products. Finished reinforcement products are then supplied to construction and infrastructure customers. This gives the group a position within both the steel manufacturing and ferrous-metal-recycling sectors. One of the group’s notable subsidiaries is Celsa Steel UK, based in Cardiff. It is described as the United Kingdom’s largest manufacturer of steel reinforcement products. The Cardiff operation manufactures reinforcement products and uses rail freight for the movement of incoming scrap, outgoing finished steel, and some on-site shunting activities. During the COVID-19 pandemic, the UK government granted Celsa Steel UK a £30 million loan through Project Birch, subject to conditions intended to support continued trading and protect the company’s operations. CELSA Group operates in a capital-intensive and cyclical industry exposed to construction demand, energy costs, scrap availability, carbon and environmental regulation, and logistics conditions. Its main competitive context includes European steel producers such as Germany’s Salzgitter AG. The group is primarily a business-to-business industrial manufacturer, so its brand visibility is concentrated among construction companies, steel distributors, infrastructure contractors, industrial customers, employees, suppliers, and public authorities rather than household consumers. CELSA presents itself as one of Europe’s leading steel manufacturers, with a focus on circular, lower-emissions steel production. Its homepage says it makes steel in electric arc furnaces using recycled ferrous scrap and offers high-quality steel solutions designed to meet business customers’ specific needs. The company describes circularity and sustainability as central to its positioning. It highlights steel’s durability, strength and efficiency, and frames its work around conserving finite natural resources and caring for people and the environment. The supplied material does not identify specific executives, founding details, ownership, headquarters, or individual product ranges, so those details are not stated here.
History
CELSA Group traces its origins to 1967, when Compañía Española de Laminación was formed in Spain. The company began as a Spanish steel-rolling business and subsequently developed into a broader steel group with activities spanning manufacturing, reinforcement products, and related steel operations. Over time, the organization expanded beyond its original national base and established a multinational presence across Europe. The group’s evolution reflects the structure of the European long-steel industry. Rather than relying primarily on consumer products, CELSA built its business around industrial customers and construction-related demand. Reinforcing steel became a central part of its identity, supplying the bars and related products used to strengthen concrete structures, buildings, transport infrastructure, and civil-engineering projects. The group also developed capabilities connected with other long steel products and the processing of ferrous scrap. A significant feature of CELSA’s industrial model is its relationship with steel recycling. Scrap metal provides an important feedstock for steel production, allowing the group’s facilities to convert recovered material into new construction steel. This links the company’s manufacturing activities with the wider ferrous-metal-recycling chain and gives logistics, scrap sourcing, energy, and environmental performance an important role in its operations. CELSA later established a substantial presence in the United Kingdom through Celsa Steel UK, headquartered operationally in Cardiff. The Cardiff plant became a major UK producer of steel reinforcement products. Its operations include the receipt of scrap steel, the manufacture of finished reinforcement products, and the dispatch of steel to customers. Rail logistics have supported these activities: since 2010, GB Railfreight has handled freight services involving incoming scrap, outgoing products, and some on-site shunting, supplemented by locomotives supplied by specialist contractors. The UK subsidiary also faced significant operational and financial events. In November 2015, two people died at the Cardiff manufacturing site on East Moors Road. During the COVID-19 pandemic, the UK government extended a £30 million loan to Celsa Steel UK through Project Birch, an emergency support scheme intended for strategically important companies affected by the economic disruption. The support was conditional on requirements relating to the company’s continued trading and business situation. Celsa Steel UK was reported as the first recipient of assistance through that scheme. By the period covered by the referenced material, CELSA Group consisted of eight principal steel companies operating across Europe and remained focused on steel reinforcement and associated long-steel activities. Its competitive environment includes other European steel producers, including Salzgitter AG of Germany. The group’s history is therefore best understood as the international expansion of a Spanish steel manufacturer into a multi-company European platform serving construction, infrastructure, recycling, and industrial markets. The supplied evidence establishes CELSA’s present-day identity as a European steel producer but does not provide a founding date, founder, early corporate history, or dated turning points. Accordingly, no unsupported chronology is assigned to the company. In the available homepage material, CELSA describes its production model as circular and lower-emissions: it uses electric arc furnaces and recycled ferrous scrap to make steel. It also presents its offer as high-quality steel solutions intended to address the specific requirements of business customers. The company’s stated priorities include circularity, sustainability, and the careful use of finite natural resources. The source does not specify individual facilities, markets beyond its European framing, ownership changes, leadership appointments, or named product launches. The UK subsidiary also faced significant operational and financial events. In November 2015, two people died at the Cardiff manufacturing site on East Moors Road. In 2019, Celsa was fined £1.8 million after an explosion at its Cardiff steelworks killed two workers and seriously injured another; Celsa Manufacturing (UK) pleaded guilty to breaching workplace health and safety regulations, and investigators found the company had failed to assess risks to employees during the maintenance work. During the COVID-19 pandemic, the UK government extended a £30 million loan to Celsa Steel UK through Project Birch, an emergency support scheme intended for strategically important companies affected by the economic disruption. The support was conditional on requirements relating to the company’s continued trading and business situation. Celsa Steel UK was reported as the first recipient of assistance through that scheme.
- 2020
Project Birch support for Celsa Steel UK
[1]The UK government provided a conditional £30 million loan to support Celsa Steel UK during the COVID-19 economic disruption.
- 2019
Celsa fined after fatal steelworks explosion
[3]Celsa was fined £1.8 million after an explosion at its Cardiff steelworks killed two workers and seriously injured another. Celsa Manufacturing (UK) pleaded guilty to breaching workplace health and safety regulations; investigators found the company had failed to assess risks to employees during the maintenance work.
- 2015
Fatal incident at Celsa Steel UK
[1]Two people died at the company's Cardiff manufacturing site in November.
- 2010
Rail freight support begins for the Cardiff operation
[1]GB Railfreight began providing freight services for Celsa Steel UK's Cardiff plant, moving scrap steel, finished products, and supporting on-site shunting.
- 1967
Formation of Compañía Española de Laminación
[1]The company that became CELSA Group was formed in Spain as Compañía Española de Laminación.
Products and positioning
A European, business-to-business steel group centered on reinforcement products, long steel manufacturing, and the recycling-based production of steel for construction and infrastructure. A European producer of circular, lower-emissions steel, emphasizing recycled ferrous scrap, electric arc furnace production, sustainability, and tailored steel solutions for businesses. A European, business-to-business steel group centered on reinforcement products, long steel manufacturing, and circular, lower-emissions steel production from recycled ferrous scrap in electric arc furnaces, serving construction and infrastructure customers.
Construction steel
Reinforcement steel
Reinforcement steel is CELSA Group’s principal described product area. It includes rebar and related steel products used to reinforce concrete in buildings, civil-engineering works, transport infrastructure, and other construction projects. The products are supplied primarily to industrial and construction customers rather than to consumers.
Steel products
Long steel products
The group’s European steel companies manufacture long steel products associated with construction and industrial applications. The referenced material identifies reinforcement products as the main focus but also places CELSA within the broader long-steel manufacturing sector.
Recycled steel
Recycled steel
Ferrous scrap is an important raw material connected with CELSA’s steelmaking activities. Scrap is transported to operating sites, processed through the steel production chain, and converted into new steel products, linking the group’s manufacturing business with ferrous-metal recycling. CELSA describes making steel in electric arc furnaces using recycled ferrous scrap.
Steel solutions
High-quality steel solutions designed for business customers’ specific needs; the homepage describes production using recycled ferrous scrap in electric arc furnaces.
Controversies
2019
Celsa fined after fatal steelworks explosion
Celsa was fined £1.8 million after an explosion at its Cardiff steelworks killed two workers and seriously injured another. Celsa Manufacturing (UK) pleaded guilty to breaching workplace health and safety regulations; investigators found the company had failed to assess risks to employees during the maintenance work.
Brand decisions
2020
Accept conditional Project Birch financingStrategyBackground
The COVID-19 pandemic created severe disruption for companies operating in strategically important industrial sectors. Celsa Steel UK sought government-backed support to maintain its operations and continue trading.
Action taken
Celsa Steel UK accepted a £30 million loan from the UK government through Project Birch, subject to conditions attached to the support.
Aftermath
The company became the first recipient identified in the referenced material as receiving assistance through Project Birch.
Government loan. £30 million (2020)
Recent events
- 2020
Celsa Steel UK received conditional support through Project Birch[1]
Other
During the COVID-19 pandemic, the UK government provided Celsa Steel UK with a £30 million loan under Project Birch, subject to conditions designed to help the company continue trading.
- 2015
Two workers died at Celsa Steel UK's Cardiff manufacturing site[1]
Other
Two people died in an incident at Celsa Steel UK's Cardiff facility on East Moors Road in November 2015.
- 2010
Celsa Steel UK continued rail freight operations for scrap and finished steel[1]
Other
From 2010, GB Railfreight handled rail freight services for Celsa Steel UK's Cardiff plant, including inbound scrap steel, outbound finished products, and on-site shunting, with additional locomotive support from contractors.
Sources3 sources
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