Special Melted Products is advancing a major Sheffield expansion intended to establish the UK’s first large scale superalloy forging capability, supporting growth across aerospace, defence, civil nuclear, and energy markets.
Known as Project Vulcan, the programme will add forging and downstream processing capacity for nickel-based superalloys and other high-integrity materials used where temperature, loading, corrosion, and long operating lives place exceptional demands on the metal.
The company expects the investment to support 150 skilled roles and increase annual revenue to more than £300 million by 2031. A further 31,000 sq ft facility has also been acquired as Special Melted Products develops the production footprint required for larger and more integrated manufacturing programmes.
A £30 million funding package from Lloyds is supporting the expansion, while Special Melted Products has contracted Danieli Breda to supply a new forging press. Two multi-year agreements with Rolls-Royce, valued at an estimated US$240 million, connect the investment directly to aerospace engine demand.
Modern aero engines rely on nickel superalloys for rotating and structural components exposed to high temperature, stress, vibration, and repeated thermal cycling. These materials retain strength where conventional steels would soften, although the same properties make them difficult and expensive to process.
Production begins with tightly controlled melting and alloy chemistry, but the route to a qualified component continues through remelting, ingot conditioning, forging temperature, deformation history, heat treatment, machining, and inspection. Small variations can influence grain structure, fatigue life, creep resistance, and the behaviour of the finished part.
Large forging capacity is strategically difficult to reproduce. Heavy presses require specialist foundations, high-capacity power supplies, furnaces, manipulators, tooling, handling systems, and experienced operators, while qualification for safety-critical aerospace and nuclear applications can take years after the main equipment has been installed.
Britain retains strong capability in alloy development, aerospace engineering, nuclear systems, and precision machining, yet some large forgings remain dependent on overseas suppliers, particularly in the United States. Project Vulcan is intended to close part of that gap by connecting Sheffield’s specialist melting base with domestic forging at an industrially useful scale.
The programme sits alongside wider investment in high-value forming equipment. Group Rhodes is expanding large press manufacturing capacity for aerospace, defence, composites, and advanced engineering applications, while skills organisations are strengthening training routes across forging, pressing, rolling, casting, and heat treatment.
Such investments reflect renewed attention to the upstream processes that sit behind final assembly. Aerospace and defence output can be constrained by a small number of specialist suppliers whose operations are difficult to replace, even where prime manufacturers have sufficient orders, factory space, and assembly capacity.
Alternative production methods are also being developed for selected components. GKN Aerospace and Pratt & Whitney are advancing an additive route for a large F135 engine structure, reducing dependence on conventional cast or forged starting material for a particular geometry.
Additive manufacturing will coexist with forging rather than replace it across the board. Material properties, fatigue performance, certification history, component size, geometry, production volume, and inspection requirements continue to favour forged products in many highly loaded applications.
Superalloy production also exposes manufacturers to energy and material costs. Remelting, furnaces, presses, heat treatment, machining, and extraction systems require substantial and reliable power, meaning that grid capacity and industrial energy prices influence the competitiveness of the completed component.
Nickel, cobalt, chromium, molybdenum, and other alloying elements are expensive and subject to geopolitical supply risk. Better control of billet size, forging allowances, machining stock, scrap segregation, and closed-loop recycling can materially affect cost, material yield, and embodied emissions.
The planned workforce will extend well beyond press operators. Metallurgists, maintenance engineers, non-destructive testing specialists, quality personnel, machinists, production planners, laboratory staff, and digital systems engineers will all contribute to the qualified process.
Recruiting and training those skills could become difficult if defence, aerospace, nuclear, and energy programmes expand simultaneously. Qualification requirements also limit the speed at which experienced personnel can be replaced, particularly where customers demand demonstrated familiarity with specific alloys and process routes.
Special Melted Products already has an established Sheffield base in high-integrity steels and superalloys, giving Project Vulcan a stronger starting position than a greenfield development. The central operational challenge will be integrating the new forging equipment with existing melting, conditioning, machining, testing, and customer approval systems without disrupting current work.
Production stability will depend on process control across the entire route rather than the rated force of the new press. Heating uniformity, forging sequence, tool condition, transfer time, deformation rate, and final heat treatment must remain within validated limits for every qualified product.
If the equipment, workforce, and approvals arrive on schedule, Project Vulcan will provide UK manufacturers with another domestic route for strategically important forged material. Its performance will be measured through qualified parts, repeatable properties, stable yields, and sustained customer programmes rather than the scale of the capital equipment alone.
