Nuclear and Power Station Metal Supplier

For nuclear construction projects, sourcing from a supplier who holds recognised nuclear sector accreditations is not optional, it is a baseline requirement. At ASD, we maintain the key certifications that the UK nuclear industry relies on:

• Fit for Nuclear (F4N), now delivered exclusively by NucCol (Nuclear Collaboration Ltd). F4N status, reflects our commitment to continuously improving operational standards in line with nuclear requirements.
• JOSCAR is Hellios pre-qualification system used by major buyers in the nuclear, defence, and aerospace sectors to vet suppliers.
• Cyber Essentials Plus certifies companies cyber security controls.

At ASD we also have an active track record on UK nuclear new-build, operational maintenance and decommissioning programmes, including a multi-million pound contract to produce and supply embedment sleeves for Hinkley Point C.

Key things to verify with any nuclear metals supplier:

• F4N status (listed in NucCol’s supplier database), JOSCAR & Cyber Essentials Plus
• Project experience - new-build, operational, or decommissioning
• CFSI management active controls against counterfeit and suspect items
• Material traceability to accredited mill source

ASD offers a dedicated nuclear supply chain management service through our Total Metals Management (TMM) service -  covering sourcing, in-house processing, quality and inspection test planning, CFSI management, documentation control, and call-off stock management, all under a single point of contact.

We have supported the reactor maintenance programme at Hinkley Point B for almost a decade and are a key partner in the manufacture of waste containers for the UK’s largest waste retrievals programme.

For procurement teams managing complex nuclear programmes, consolidating your metals supply through a single managed service reduces the number of touchpoints in your chain - and the compliance risk at each one.

The UK nuclear supply chain demands a very specific combination of capabilities. ASD is one of the UK’s leading suppliers of specialist metals to the nuclear sector, stocking carbon steel, stainless steel, aluminium, and specialist alloys across 12 UK sites with over 70,000 tonnes of stock. We also offer extensive in-house processing capability: laser and water jet cutting, profiling, sawing, bending, shot blasting and more.

We supply metals and processed components for nuclear applications, including Duplex stainless steel, structural steel, plate and specialist alloys selected for high-integrity environments.

We can support nuclear power, new build, decommissioning, reprocessing, waste management and other critical nuclear engineering applications.

Common nuclear grades include 304L and 316L, with other grades such as duplex, super duplex, 321 and precipitation-hardening alloys used where specific performance requirements apply.

In nuclear environments, cross-contamination of stainless steel by carbon steel can damage the metal's protective passive film, leading to corrosion that undermines structural integrity and long-term performance.

Yes, we know nuclear projects require strict control, traceability and certification, and we can supply materials to suit those expectations.

Yes, we support decommissioning and waste management projects with suitable material supply - for example Duplex Stainless Steel, widely used for waste containers, storage infrastructure and other critical plant applications.

We like to get involved at the earliest stage of a project, which gives us the chance to break down requirements into the finest detail and develop prototypes for the proposed nuclear solution. Using waterjet cutting and press brake forming, we produce components in line with the customer's specification, then package them as kits of parts ready for assembly - helping reduce waste and improve project efficiency.

We've delivered to nuclear standards before, from waste decommissioning storage boxes to embedment sleeves at Hinkley Point C, so we understand what these projects demand from a supplier. That experience underpins how we work: safety first culture, backed by strong stockholding and specialist processing capabilities, giving nuclear customers a dependable source for materials used in critical applications. Our Total Metals Management service takes this further by providing a coordinated approach to complex projects, helping customers plan and control material requirements from initial sourcing through to delivery.