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ferro-alloy
ferro-alloy n.
Brit. 
/ˌfɛrəʊˈalɔɪ/
, /ˌfɛrəʊˈalɔɪ/U.S. /ˌfɛroʊˈæˌlɔɪ/
an alloy of iron with one or more other elements, typically a metal; esp. such an alloy used as an additive to modify the composition of steel./ˌfɛroʊˈæˌlɔɪ/ΘΚΠ
society > occupation and work > materials > derived or manufactured material > metal > alloy > [noun] > iron alloys
ferromanganese1864
manganeisen1881
ferro-alloy1888
silico-manganese1895
Mumetal1924
1888 Engineering 7 Sept. 232/1 The aluminium in the Cowles Company's ferro-alloy..is thoroughly integrated.
1928 C. T. Kingzett Chem. Encycl. (ed. 4) 395 Ferro-alloys are used in the steel industry to remove oxygen and nitrogen from molten steel, or to introduce into the steel a small proportion of the metal.
1960 Times 31 May (S. Afr. Suppl.) p. iv/4 The ferro-alloys used by the Union's iron and steel industry.
2012 Sunday Times (Nexis) 6 May (Business section) 1 Investors will end up with shares in the core Kazakh ferroalloy and iron mining business.
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