thumb|left|alt=Photo of the Forgemasters steel works, Sheffield|Forgemasters steel works in Sheffield. The site was formerly run by Vickers Limited which was founded in Sheffield in 1828 and became one of the most prominent engineering companies in the world. Forgemasters, founded in 1805, is the sole remaining independent steel works in the world and dominates the north-east of Sheffield around the Lower Don Valley. The firm has a global reputation for producing the largest and most complex steel forgings and castings and is certified to produce critical nuclear components, with recent projects including the Royal Navy's submarines. The firm also has the capacity for pouring the largest single ingot (570 tonnes) in Europe and is currently in the process of expanding its capabilities. In July 2021 Forgemasters was bought outright by the UK Ministry of Defence for £2.56 million, with the intention of investing a further £400 million over the next decade. The decision was based on the important role Forgemasters plays in the construction of the UK nuclear submarine fleet as well other vessels for the Royal Navy.
thumb|left|alt=photo of the forgemasters steel works sheffield|forgemasters steel works in sheffield the site was formerly run by vickers limited which was founded in sheffield in 1828 and became one of the most prominent engineering companies in the world forgemasters founded in 1805 is the sole remaining independent steel works in the world and dominates the north-east of sheffield around the lower don valley the firm has a global reputation for producing the largest and most complex steel forgings and castings and is certified to produce critical nuclear components with recent projects including the royal navy's submarines the firm also has the capacity for pouring the largest single ingot (570 tonnes) in europe and is currently in the process of expanding its capabilities in july 2021 forgemasters was bought outright by the uk ministry of defence for £256 million with the intention of investing a further £400 million over the next decade the decision was based on the important role forgemasters plays in the construction of the uk nuclear submarine fleet as well other vessels for the royal navy