 The works expanded from producing only pig iron to include steel production in the early 20th century, with mills specialising in long products including railway rail.As part of the business the company constructed a jetty at Skinningrove, and owned an ironstone mine in Loftus.The works existed as a separate entity under the overall ownership of Pease and Partners bank until nationalisation into the Iron and Steel Corporation of Great Britain in 1951, returned to private ownership in 1963, and renationalised into British Steel Corporation (BSC) in 1967.