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silico-manganese
silico-manganese n. 
/ˌsɪlᵻkə(ʊ)maŋɡəˈniːz/, /ˌsɪləkoʊˈmæŋɡəˌnis/ a ferro-alloy containing relatively high proportions of manganese and silicon, spec. one containing 65 to 70 per cent manganese and 12 to 25 per cent silicon which is used in steel-making as a manganese-containing additive and as a deoxidizer.
Brit. /ˌsɪlᵻkə(ʊ)ˈmaŋɡəniːz/
, /ˌsɪlᵻkə(ʊ)ˈmaŋɡəniːz//ˌsɪlᵻkə(ʊ)maŋɡəˈniːz/U.S. /ˌsɪləkoʊˈmæŋɡəˌniz/
, /ˌsɪləkoʊˈmæŋɡəˌniz//ˌsɪləkoʊˈmæŋɡəˌnis/ΘΚΠ
society > occupation and work > materials > derived or manufactured material > metal > alloy > [noun] > iron alloys
ferromanganese1864
manganeisen1881
ferro-alloy1888
silico-manganese1895
Mumetal1924
1895 E. L. Rhead Metall. ix. 112 Siliconeisen and silico-manganese are irons containing silicon, or silicon and manganese... They are employed in steel manufacture.
1941 Trans. Amer. Soc. Mech. Engineers 63 367/2 Both high-manganese and silicomanganese steels equal the chrome-vanadium steel tested and may have commercial advantages.
1956 W. D. Hargreaves in D. L. Linton Sheffield 280 The city therefore uses quite large tonnages of pig-iron and of alloying metals..such as..silico-manganese.
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