The same ferro silicon family as the 75% grade page — coke, steel chips and quartz reduced at 1500–1800 °C — offered here as the general ferro silicon alloy listing for steel and foundry buyers who specify 75 / 72 / 70 / 65.
This page is the catalog entry for ferro silicon alloy as a product family. Silicon is added both to remove oxygen and to stay in the steel as an alloying element. In the foundry, ferro silicon is an inoculant and a helper for spheroidal graphite in ductile iron. High-silicon ferro silicon is also a common reductant when producing low-carbon ferroalloys.
Specification
| grade | Si min | Al max | S max | P max | C max |
|---|---|---|---|---|---|
| FeSi75 | 75.0 | 1.50 | 0.02 | 0.04 | 0.20 |
| FeSi72 | 72.0 | 1.50 | 0.02 | 0.04 | 0.20 |
| FeSi70 | 70.0 | 2.0 | 0.02 | 0.04 | 0.20 |
| FeSi65 | 65.0 | 2.0 | 0.02 | 0.04 | 0.20 |
Composition table published on the source product page. Same grade set as Ferro Silicon 75%.
Where it is used
- Steelmaking deoxidizer — precipitation and diffusion routes
- Silicon addition to structural, spring, bearing, heat-resistant and electrical steels
- Reductant in ferroalloy plants making low-carbon alloys
- Cast-iron inoculant and nodularizing support
Process notes
- Si + O forms SiO2 and releases heat, useful while the ladle is being killed
- High-Si ferro silicon is preferred as a reductant because its carbon is already low
- In ductile iron, ferro silicon is used together with nodularizers to control graphite shape
Questions buyers ask
How is this different from Ferro Silicon 75%?
Both listings share the same 75 / 72 / 70 / 65 grade table. Use this page when you want the family name; use the 75% page when the enquiry is locked to FeSi75.
Typical uses in steel?
Deoxidation and silicon alloying. Adding silicon raises strength, hardness and elasticity and is used in transformer / electrical steels.
Packing?
1 MT big bags. Confirm size split with the sales desk before booking.
