Steelwork assembly starts on UK’s largest Open Die Forge | Sheffield Forgemasters
Published: 6 May 2026Sheffield Forgemasters has begun steelwork assembly on the UK’s largest open die forging line.
The company is building a new 13,000-tonne forging line at Brightside Lane, with steelwork for the building projecting to 45 metres high, more than ten metres taller than surrounding structures.

Images captured following the start of steelwork assembly of the New Forge at Sheffield Forgemasters
With steelwork for our 30,000 m2 New Machine Shop on nearby Weedon Street at an advanced stage, the construction works are transforming the traditional manufacturing heartland of the city, dwarfing the adjacent Meadowhall shopping centre and Ikea superstore.
Gareth Barker, Chief Operating Officer, said: “We are now at an exciting phase of our £1.3 billion recapitalisation programme, where the physical reality of what we are delivering for the city starts to manifest.
“With the New Machine Shop and Forge programmes on schedule, we can expect to see framework for both buildings completed by the end of the year, with external cladding underway ahead of the Winter.
“The new Forge will bring a dramatic increase in capacity and capability for the manufacture of highly complex, large-scale forged components required for UK defence programmes and for civil nuclear developments.
“With a secure future, we are in a position to deliver new levels of nuclear-grade manufacturing as we train our employees and apprentices to adopt the latest technologies and expand the parameters of what can be achieved with state-of-the-art equipment.”

A CGI look at the the inside and external of the new Forge at Sheffield Forgemasters
Sheffield Forgemasters was formed in 1983 with the merger of Johnson, Firth Brown Ltd and British Steel’s River Don Works on Brightside Lane in Sheffield, where the Naylor, Hutchinson Vickers & Co enterprise located in 1863, having previously operated at Millsands in the city centre.
The company has traced its heritage back to 1776, the year of American independence, when George Naylor helped his cutlery manufacturing partnership to move into steelmaking through the construction of a crucible steel furnace in the city.
Sheffield Forgemasters still operates from the River Don Works site and is expanding onto the former William Jessop & Sons’ Brightside Steel Works at Weedon Street, where the new Machine Shop will be located, housing 24 new machines including some of the world’s largest vertical turning lathes.
The 13,000-tonne press building is under construction on the North side of Brightside Lane, adjacent to the Midland Mainline railway, with both projects forming the backbone of a £1.3 billion recapitalisation programme to underpin UK defence programmes.
Key partners on the recapitalisation project include McLaughlin & Harvey, Arup, Bond Bryan, Turner and Townsend, JLL, Ipsum and JBA Bentley.