Sir Robert Hadfield FRS 1st Baronet

Died aged 81

Sir Robert Abbott Hadfield, 1st Baronet FRS (28 November 1858 in Sheffield – 30 September 1940 in Surrey) was an English metallurgist, noted for his 1882 discovery of manganese steel, one of the first steel alloys. He also invented silicon steel, initially for mechanical properties (patents in 1886) which have made the alloy a material of choice for springs and some fine blades, though it has also become important in electrical applications for its magnetic behaviour.

Wikidata Wikipedia

Commemorated on 2 plaques

Hecla Works, Newhall Road. At Hecla Works Robert A Hadfield developed manganese steel, one of the first 'special' steels. Hadfields once employed 15,000 here and at East Hecla Works, Tinsley

ex-Hecla Works, Newhall Road, Sheffield, United Kingdom where they developed manganese steel

Sir Robert Hadfield Bt 1858-1940

165 Oxford St., London, ON, Canada where they lived