In 1870 Osborn met Robert Forester Mushet, an iron master working in the Forest of Dean where he was producing a new alloy steel, considered far superior to crucible steel. Osborn bought the sole rights to manufacture 'R. Mushet's Special Steel' (R.M.S) and Mushet's two sons, Henry and Edward, moved up to Sheffield to oversee its manufacture. Business was booming with orders created by the Franco-Prussian War and the development of the railways.
