Heavy engineering, large-capacity CNC machining and high integrity steel fabrication.
From plate to finished component, Stephenson Engineering delivers integrated heavy engineering solutions for demanding industrial applications.
Based in Atherton, Greater Manchester, Stephenson Engineering is a UK manufacturer specialising in large-scale CNC machining, heavy steel fabrication, coded welding and complex engineered assemblies.
Our in-house capabilities include machining, fabrication and welding, non-destructive examination (NDE), proof-load testing, assembly and protective coatings. By bringing these processes together at one facility, we help customers simplify supply chains, coordinate quality requirements and manage complex manufacturing projects through a single engineering partner.
Supporting critical engineering applications.
We work with customers across subsea and offshore energy, renewables, nuclear, mining, rail and transportation, defence and civil engineering markets.
Our approach combines established manufacturing expertise, specialist engineering knowledge and a commitment to quality for components operating in demanding service environments.
We take your high integrity components, assemblies and structures from plate to paint within our facility.
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We deliver complex components and high integrity structures that provide vital engineering solutions in load, service and safety critical applications.
Our advanced engineering supports operational performance and reliability across the most demanding service conditions and environments.
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Stephenson Engineering has extensive large-capacity CNC machining capabilities for components and structures up to 14 metres and 35 tonnes in weight.
Our range of machines covers:
• Milling
• Drilling
• Vertical boring
• Horizontal turning
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Core to our business is the manufacture of complex, high integrity steel fabrications in various section sizes up to 35 tonnes in weight.
• TIG/MAG/FCAW/SAW processes
• 234 Procedure qualification records
• Qualified to thicknesses from 8 to 350mm
Large components. Integrated capabilities. Proven engineering experience.
Large-capacity CNC machining: Components up to 14 metres long and 35 tonnes in weight.
Heavy steel fabrication: Complex welded fabrications and engineered structures, manufactured to customer drawings and specifications.
Proof-load testing: In-house testing capability up to 300 tonnes, subject to the test configuration and requirements.
Inspection and quality assurance: Integrated inspection, testing and traceability to applicable project and customer requirements.
Turnkey manufacturing: Coordinated production from initial material processing through machining, testing, assembly and final coating.
A manufacturing partner for complex projects.
Whether you require a specific subcontract manufacturing process or a coordinated turnkey solution, our team can assess your drawings, specifications and quality requirements to determine how our facilities can support your project.
Contact our engineering team to discuss your requirements or request a quotation.
Call: +44 (0)1942 883 046 Email: sales@stephensoneng.co.uk
Our Sectors
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Subsea and offshore
Stephenson Engineering has supported the subsea oil and gas sectors for the past 45 years, working with all the oil majors and service companies. We produce high-integrity customer-designed products to customer-designed specifications.
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Mining
Our unparalleled sector knowledge and experience is combined with modern engineering techniques and processes to produce an unbeatable range of products and specialist services.
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Renewables
Keen to play our role in ensuring a sustainable future, Stephenson Engineering is increasingly active in the renewable energy sector. We’ve been manufacturing components for offshore wind platforms for many years, creating fabrications that are precise, tolerant and reliable.
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![Two large cooling towers of a nuclear power plant, with greenery and a road in the foreground, under a partly cloudy sky.]()
Nuclear
Stephenson Engineering works across both the civil and defence nuclear sectors, producing machined steel fabrications including Class 1 nuclear components.
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Rail and transportation
Stephenson Engineering has worked within the rail industry for many years, producing a variety of components, from bridge bearings and shear plates to steam locomotive motion.
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Defence
Our engineering facilities are ideally suited to manufacturing large steel machined fabrications, and in this respect we deliver a variety of components to the defence sector.
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Civil Engineering
Civil engineering projects have always formed an interesting and challenging part of our work. We have manufactured components for many UK and overseas projects, concentrating mainly on large and complex engineered nodes and fittings.
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![An industrial factory emitting CO2 into the air, with a tree and green leaves in the foreground and a blue sky with clouds in the background.]()
Emerging energies
With over three decades of engineering experience within traditional energy sectors, we are perfectly placed to support CCS projects and hydrogen technology.
