What Are Ferroalloys?

Ferroalloys are iron-based alloys that contain a high percentage of one or more additional elements such as silicon, manganese, chromium, or molybdenum. These alloys are essential raw materials used in the steelmaking and metal casting industries.

Ferroalloys are mainly used to improve the physical and chemical properties of steel, including strength, hardness, corrosion resistance, and wear resistance. In addition, they play an important role during the steel production process, particularly as deoxidizers and alloying agents.

Because of these critical functions, ferroalloys are closely linked to the iron and steel industry, which remains the largest consumer of these materials worldwide.

Main Types of Ferroalloys

Several types of ferroalloys are commonly used in steel production, each serving a specific purpose.

Ferrochromium (FeCr)
Used to increase corrosion resistance and hardness in stainless steel and alloy steels.

Ferromanganese (FeMn)
An essential additive used to improve strength and remove oxygen and sulfur from molten steel.

Ferromolybdenum (FeMo)
Used in alloy steels to increase strength, hardness, and resistance to high temperatures.

Ferrophosphorus (FeP)
Used mainly in the production of special steels and cast iron to improve strength and fluidity.

Ferrosilicon (FeSi)
One of the most widely used ferroalloys in steelmaking, mainly used as a deoxidizer and alloying element.

Ferrosilicon Magnesium (FeSiMg)
Commonly used in the production of ductile iron (nodular cast iron) to improve mechanical properties.

Silicomanganese (FeSiMn)
Used as a combined source of silicon and manganese in steel production.