How much does a ferro silicon cost? What is the price of FeSi?
| China's export price of ferrosilicon on April 15, 2026 | ||||
| Unit: US dollars/ton | ||||
| product | Brand | Quotation | rise and fall | Remark |
| Ferrosilicon | 72 | 1140-1160 | -- | FOB Tianjin Port |
| Ferrosilicon | 75 | 1180-1200 | -- | FOB Tianjin Port |
Ferrosilicon 72 vs 75: Which One Should You Choose?
Ferrosilicon 72 vs 75: Which One Should You Choose for Steelmaking and Casting?
Ferrosilicon 72 and ferrosilicon 75 are two widely used silicon-iron alloys in steelmaking and foundry applications. The key difference lies in silicon content, deoxidation strength, impurity control, and cost efficiency. In general, FeSi 75 provides stronger deoxidation and higher efficiency for high-quality steel, while FeSi 72 offers a more cost-effective solution for general steel and casting production.
Chemical Composition and Technical Specifications of FeSi 72 vs FeSi 75
| Parameter | Ferrosilicon 72 | Ferrosilicon 75 |
|---|---|---|
| Si Content | 72%–75% | 74%–80% |
| Fe Content | Balance | Balance |
| Al Content | ≤1.5% (typical) | ≤1.5% (stricter control) |
| Ca Content | ≤0.06% | ≤0.05% |
| Carbon | ≤0.08% | ≤0.05% |
| Melting Point | Lower (~1200–1350°C) | Higher (~1300–1410°C) |
| Deoxidation Power | Medium | Strong |
| Cost Level | Lower | Higher |
| Application Focus | General steel & casting | High-grade steel & ductile iron |
How Ferrosilicon 72 and 75 Perform in Steelmaking and Casting
In steelmaking, ferrosilicon is used as a powerful deoxidizer and alloying agent. It removes oxygen from molten steel and improves steel strength, hardness, and corrosion resistance.
Ferrosilicon 75 has a higher silicon content, which means it reacts more efficiently with oxygen in molten steel. This leads to faster deoxidation, fewer inclusions, and cleaner steel quality, making it suitable for high-strength steel, electrical steel, and precision alloy steel production.
Ferrosilicon 72, while slightly lower in silicon content, provides more stable and cost-efficient performance in general steel production and cast iron manufacturing. It is widely used in construction steel, medium-carbon steel, and large-volume casting processes where ultra-high purity is not required.
In foundry applications, FeSi 75 improves graphite formation in ductile iron, while FeSi 72 offers better cost control for standard gray iron and general castings.
Ferrosilicon 75 vs 72 vs Other Common Grades in Industrial Use
FeSi 75 vs FeSi 72
FeSi 75 provides stronger deoxidation capability due to its higher silicon content, resulting in improved steel cleanliness and mechanical properties. It is preferred in high-end steel production where quality consistency is critical.
FeSi 72 is more economical and widely used in bulk production. It offers stable performance but slightly lower efficiency in oxygen removal, making it suitable for cost-sensitive steelmaking operations.
FeSi 75 vs Lower-Grade Ferrosilicon (FeSi 65–70)
Compared with lower grades, FeSi 75 has significantly higher silicon content, which increases deoxidation efficiency and alloying strength. Lower grades are cheaper but require higher consumption per ton of steel, making FeSi 75 more efficient in long-term production.
Industrial Selection Guide: How Buyers Should Choose
If your production focuses on high-strength steel, electrical steel, or ductile iron, FeSi 75 is the better choice due to its stronger reaction efficiency and cleaner steel output.
If your focus is construction steel, general casting, or cost optimization, FeSi 72 is more suitable because it provides stable performance at a lower price.
Many steel plants use both grades depending on product category and furnace stage requirements.
Conclusion: 72 vs 75 Ferrosilicon Selection Strategy
The difference between ferrosilicon 72 and 75 is mainly determined by silicon content and metallurgical efficiency. FeSi 75 delivers higher performance and cleaner steel, while FeSi 72 provides cost-effective stability for large-scale production. The correct selection depends on your steel grade requirements, production cost structure, and quality standards.
FAQ for Steel and Foundry Buyers
What is the main difference between FeSi 72 and 75?
The main difference is silicon content: FeSi 75 has higher Si, giving stronger deoxidation performance.
Which one is better for steelmaking?
FeSi 75 is better for high-grade steel, while FeSi 72 is suitable for general steel production.
Is FeSi 72 cheaper than FeSi 75?
Yes, FeSi 72 is usually more cost-effective due to lower silicon content.
Can both grades be used in casting?
Yes, both are used in casting, but FeSi 75 is preferred for ductile iron.
Does silicon content affect steel quality?
Yes, higher silicon improves deoxidation and reduces impurities in steel.
Which grade is more widely used globally?
FeSi 72 is more widely used due to cost efficiency and general applications.
Get Reliable Ferrosilicon Supply for Steelmaking
We supply stable ferrosilicon grades for global steel and foundry industries:
FeSi 72 / FeSi 75 / custom grades available
Stable silicon content with controlled impurities
Consistent lump size for furnace use
Bulk supply for steel mills and foundries
📩 Email: market@zanewmetal.com
📱 WhatsApp: +86 15518824805
Contact us today for a competitive quotation within 24 hours.
Why Choose ZhenAn for Ferrosilicon (FeSi)?
Stable Silicon Content – Consistent Si levels ensure reliable performance in steelmaking and foundry applications.
Low Impurity Control – Strict control of Al, C, S, and P improves final steel quality and process stability.
Multiple Grades Available – FeSi 75, 72, 70 and other specifications to meet different metallurgical requirements.
Reliable Bulk Supply – Strong production capacity supports continuous delivery for long-term procurement needs.
Competitive Factory Price – Direct supply model helps reduce overall sourcing cost for global buyers.
Export-Ready Documents – COA, MSDS/SDS, packing list and other documents provided for smooth import clearance.
ZhenAn provides stable and cost-effective ferrosilicon solutions for global steel and casting industries.
