A manganese steel invented in 1882 by Robert A. Hadfield in Sheffield, England. It has an austenitic structure and an approximate analysis of 12.5% Mn, 1.2% C. Patents granted to Hadfield in 1882-85 covered alloys from 7 to 30% manganese. The steel was first made in the United States in 1892.

Hadfield steel has certain characteristics which make it very useful. For example, it is work hardening. The metal is relatively soft and very tough after quenching in cold water after it is removed from the furnace. Hardness and toughness continue to increase as items made from this steel are impacted by repeated blows during service. See MANGANESE STEEL.

 

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