Silicon Alloys and Silicon Metal

Ferrosilicon (FeSi) is an alloy of silicon and iron. The production is based on quartz, iron ore, coal, coke and biocarbon.

Frequently traded on Metalshub

Metalshub is the leading digital B2B platform for the iron and steel industry. Foundries and steel mills use our platform to purchase ferroalloys like ferrosilicon from a global pool of qualified traders and producers. 

NameAbbreviationSize (mm)Si Content (%)



2-10 (fines)




10-50 (lumpy)


Silicon carbide

SiC grains



FeSi Inoculant




Silicon metal

Si metal



Ferrosilicon Magnesium




Calcium Silicon




Ferrosilicon briquettes

FeSi briq



Ferrosilicon Low Al

FeSi Low Al



How can Metalshub help?

Save time and expand your supplier list by managing your entire purchasing process through one supply chain tool

Grow your business with new customers and improve your negotiation process and analytics with our digital tool

Find out more about the most reliable ferrotitanium price index

Access price index

Application of relevant Silicon types

Ferrosilicon (FeSi):

Commercially available ferrosilicon usually contains 15, 45, 75 or 90 wt% silicon. FeSi is supplied to the market in fine (2-10 mm) and lumpy (10-50 mm) form. The fine form is mainly used in foundries that add their alloying agents in the melting ladle. This is because the larger surface area of the alloying agent counteracts the temperature loss in the ladle and the lower dissolution rate.

Calcium Silicon (CaSi):

About 90% of the calcium silicon produced is consumed by the steel industry, where it is used as a deoxidising and desulphurising agent in the production of high-grade steel. Calcium Silicon can be obtained in lumpy or powder form. The most widely used method for integrated steel applications is in the form of cored wire.

Ferrosilicon Briquettes (FeSi Briqs): 

Ferrosilicon briquettes are used by steel producers as a deoxidation and alloying element as well as a source of heat in BOF (Basic Oxygen Furnace). The solid compression of the pure material, the lower dust load, and the easier transport make it a possible substitute for standard FeSi. 

Silicon Carbide (SiC Briqs / Grains): 

Silicon carbide is used both by cast iron foundries and in steelmaking. In foundries, it is used as an alloying agent, especially in the form of silicon carbide briquettes for cupola smelting. The silicon carbide is simply dissolved into the liquid iron to supply both the silicon and carbon to the melt. In steelmaking, it is used as a powerful fuel for BOF (Basic Oxygen Furnace), which is why it can also be used as a substitute for FeSi.

Silicon Metal (Si Metal): 

A large part of the silicon metal produced is used as an alloying agent for aluminum alloys and is also used in the chemical industry to produce siloxanes and silicones.

Ferrosilicon Magnesium (FeSiMg): 

Ferrosilicon magnesium is used as an alloying agent by cast iron foundries to produce all types of Ductile Iron. In steel production, it is mainly used for deoxidising the liquid melt. In contrast to pure magnesium alloys, FeSiMg has a considerably lower vapour pressure, which makes it much easier to use and handle. 

Inoculants (e.g FeSiZr): 

Inoculants are a group of FeSi-based alloys for treating cast iron melts in iron foundries in order to improve the balance of nuclei for eutectic solidification. There are numerous special inoculants for the individual casting materials, which can contain active metals such as barium, titanium, aluminium, zirconium, and strontium as well as rare earths such as cerium and lanthanum. The addition of the inoculant is ideally done shortly before or during casting.

Ferrosilicon Material Data Sheet

Access data on all commercially relevant Silicon grades, traded on the Metalshub Marketplace.

Top Silicon Suppliers

Access a contact list of the top producers & traders and receive offers through the platform.


-500 vetted metals suppliers 

-Transaction based ratings

-KYC-details & ISO Certificates


Register to receive access to the entire list.

Building the future of metals trading

We will guide you through our supply chain tool in your language

Join us for a 15 min demo and learn more about how our digital solutions can help you achieve efficiency and profitability in your procurement



Get to know us

Follow Us

© Metals Hub GmbH. All rights reserved.