I-Ferrosilicon alloy ikwabizwa ngokuba yi-ferrosilicon. I-Ferrosilicon yi-silicon kunye nentsimbi eyenziwe i-Fe2Si, i-Fe5Si3, i-FeSi, i-FeSi2 kunye nezinye iisilidi. Zingawona macandelo aphambili e-ferrosilicon kwaye asetyenziswa ikakhulu njenge-deoxidizers okanye izongezo ze-alloying element. Umxholo we-Silicon kuluhlu lwe-8.0% -95.0% ye-alloy yensimbi kunye ne-silicon. I-Ferrosilicon ngokomxholo we-silicon ye-45%, i-65%, i-75% kunye ne-90% kunye nezinye iindidi, i-ferrosilicon ngokomxholo wayo we-Si kunye nokungcola kwayo kwahlula ngamabakala angama-21.
I-Ferrosilicon yeyona ferroalloy isetyenziswa kakhulu kwaye yinto eyimfuneko kwinkqubo yokwenza intsimbi. Ukusetyenziswa kwayo okuphambili kufana ne-deoxidizer kunye ne-alloying agent kwi-steelmaking, ukuphelisa i-oksijini eninzi kunye nesulfure kwintsimbi yokuphucula umgangatho kunye nokusebenza kwentsimbi. Ukongeza ekusebenziseni i-ferrosilicon ekwenzeni intsimbi, enye into ebalulekileyo kukunyibilikisa isinyithi se-magnesium.