Ferro silicon in FeSi 75, 72 and 65 grades at 63–80% silicon, sized 10–100mm for furnace charging. Low-aluminium grades available for inclusion-sensitive steels, with SGS chemistry and screen analysis at load port.
The grade number is the silicon percentage. FeSi 75 is nominally 75% silicon. Higher silicon means more deoxidising power per kilogram added and less iron carried into the melt, which is why it commands a premium.
FeSi 75 is the international standard for steel deoxidation. Lower grades carry more iron per unit of silicon, so if you are calculating cost per unit of contained silicon rather than per tonne, the higher grade often works out better despite the headline price.
Silicon is a powerful deoxidiser. Added to molten steel it scavenges dissolved oxygen, preventing gas porosity and improving the cleanliness of the final product. It also acts as an alloying element in silicon steels.
Aluminium is the alternative deoxidiser and is stronger per unit, but it forms alumina inclusions that cause problems in some grades. Silicon is the standard choice where inclusion control matters.
On specifications: the figures above reflect standard industry specifications for this product. Your actual batch values are confirmed on the Mill Test Certificate or Certificate of Analysis issued against your specific lot — provided with every shipment, and with sample orders before you commit to bulk. We do not ask buyers to take a specification on trust.
Ferro alloys are bulk commodities where independent load-port verification is standard practice.
HS Code 7202.21 (FeSi, silicon above 55%) · 7202.29 (other FeSi). Packing in 1 MT jumbo bags or bulk.
MOQ is discussed at order stage. Pricing normally on a silicon content basis with adjustment clauses. Payment by advance TT, LC at sight, or DP/DA case by case.
The number is the silicon percentage. FeSi 75 is nominally 75 percent silicon, typically supplied in a 72 to 80 percent range. FeSi 72 and FeSi 65 carry progressively less silicon and more iron. FeSi 75 is the international standard for steel deoxidation.
Calculate cost per unit of contained silicon rather than price per tonne. Lower grades carry more iron per unit of silicon, so you charge more material to achieve the same deoxidation and carry more iron into a melt that may not need it. FeSi 75 frequently works out cheaper on that basis despite the higher headline price.
Aluminium is a stronger deoxidiser per unit but forms alumina inclusions that cause problems in certain steel grades, particularly where surface quality or fatigue performance matters. Silicon is the standard choice where inclusion control is important, and the two are often used together in a controlled sequence.
Standard FeSi 75 holds aluminium to a maximum of 1.5 to 2.0 percent as a residual. If your grade is sensitive to alumina inclusions, specify a tighter aluminium maximum at enquiry stage, since low-aluminium FeSi is produced specifically for those applications and has to be selected at the source.
Ferro-silicon containing more than 55 percent silicon is exported under HS Code 7202.21. Other ferro-silicon falls under HS Code 7202.29. We declare the correct code based on the grade ordered.
Size affects dissolution rate and recovery. The commercial default is 10 to 100mm for furnace charging. Undersize generates dust and is lost; oversize dissolves slowly. Always state a maximum permissible fines percentage below 10mm and have screen analysis performed at load port.
Technical drawings welcome. FOB or CIF pricing within 24 hours. Third-party inspection available.
Technical drawings welcome. FOB or CIF pricing, samples available.
Request Quote → 💬 WhatsApp +91-9066444896
