what are its alloys?
Ferrosilicon or silicocalcium and aluminium-silicon (silumin)
Silicon
Elemental silicon is added to molten cast iron as ferrosilicon or silicocalcium alloys to improve performance in casting thin sections and to prevent the formation of cementite where exposed to outside air. The presence of elemental silicon in molten iron acts as a sink for oxygen, so that the steel carbon content, which must be kept within narrow limits for each type of steel, can be more closely controlled. Ferrosilicon production and use is a monitor of the steel industry, and although this form of elemental silicon is grossly impure, it accounts for 80% of the world's use of free silicon. Silicon is an important constituent of electrical steel, modifying its resistivity and ferromagnetic properties.

The properties of silicon may be used to modify alloys with metals other than iron. "Metallurgical grade" silicon is silicon of 95–99% purity. About 55% of the world consumption of metallurgical purity silicon goes for production of aluminium-silicon alloys (silumin alloys) for alumini
what is earth? Third planet from the Sun what is its shape? Nearly spherical when did its formation start? Ga ago what is its chemical composition? Iron, oxygen, silicon, magnesium, sulphur, nickel, calcium, and aluminum, and trace amounts of other elements. when was the third mentioned composition discovered? 1787 what is its crystal structure? Crystallises in a giant covalent structure at standard conditions, specifically in a diamond cubic lattice.
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Silicon [SEP] Alloys
Elemental silicon is added to molten cast iron as ferrosilicon or silicocalcium alloys to improve performance in casting thin sections and to prevent the formation of cementite where exposed to outside air. The presence of elemental silicon in molten iron acts as a sink for oxygen, so that the steel carbon content, which must be kept within narrow limits for each type of steel, can be more closely controlled. Ferrosilicon production and use is a monitor of the steel industry, and although this form of elemental silicon is grossly impure, it accounts for 80% of the world's use of free silicon.