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of Weybridge, Surrey
1921 Company incorporated. Name subsequently changed to Electric Furnace Co.
WWII Installed 1500 electric furnaces, especially important for treating aluminium and magnesium alloys for aircraft. Also important uses with alloy steels for aero engines and gas turbines. Manufacture of metals for radar uses. More than 8 million tank track links were cast from electric arc furnaces. The TOCCO high frequency process was used for surface hardening. Electric steel, with excellent armour piercing properties, had become standard for tank turrets. Also used in brass melting for shell cartridges. Developed knowledge in use of molten salts. Electro-chemical process for cleaning shell cases.
1955 Name changed to Efco.