science · 30 September 1940 · 84 years ago
death
Died 30 Sep 1940 at age 81 (born 28 Nov 1858).
English metallurgist (Baronet) who developed manganese steel, an alloy of exceptional durability that found uses in the construction of railroad rails and rock-crushing machinery. Hadfield discovered manganese steel in 1882. It was hardened by quenching it in water from a temperature of a thousand degrees centigrade. The hard steel was to be used in the manufacture of tram wheels. He patented his work in 1883-4 but continued to carry out further experiments before publicising his findings in 1888, which were supported by a lecture tour. The first World War provided new markets for manganese steel: spur armour plate and shells, tank treads and soldier's helmets. By 1919, Hadfields Steel Foundry Co. Ltd. were Sheffield's biggest employers.
OnThisDay.net