What is the price of ferrosilicon today?
| China's export price of ferrosilicon on April 10, 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 |
What are the common grades of ferrosilicon?
The most common grades of ferrosilicon are primarily classified by silicon (Si) content, with FeSi75, FeSi72, and FeSi65 being the mainstream commercial grades used globally. Among them, FeSi75 is the most widely used due to its high purity and strong deoxidation performance, while FeSi72 and FeSi65 are selected based on cost-efficiency and specific metallurgical requirements.
Why are ferrosilicon grades defined by silicon content?
Ferrosilicon is an essential alloy in steelmaking and casting, and its performance is directly determined by the percentage of silicon it contains. The higher the silicon content, the stronger its deoxidation ability, inclusion modification capability, and alloying efficiency.
In industrial procurement, buyers do not simply purchase "ferrosilicon"-they specify grades like FeSi75 or FeSi72 because each corresponds to a defined silicon range:
FeSi75 (Si: 72–75%)
This is the benchmark grade for most steel plants. It offers high efficiency in oxygen removal and stable chemical performance, making it ideal for carbon steel, alloy steel, and stainless steel production.
FeSi72 (Si: 70–72%)
Slightly lower silicon content but more cost-effective. Commonly used where ultra-high purity is not critical, such as general steelmaking and foundry applications.
FeSi65 (Si: 60–65%)
A more economical grade, typically used in casting, low-grade steel, or as a reducing agent. It provides acceptable performance at a lower cost per ton.
In addition to silicon, trace elements like Al, Ca, and C are also tightly controlled depending on application, especially for high-end steelmaking.
How do different ferrosilicon grades compare in real applications?
The choice between FeSi75, FeSi72, and FeSi65 is not just about silicon percentage-it is a balance between performance, cost, and application requirements.
In steelmaking, FeSi75 dominates because it ensures cleaner steel with fewer inclusions. Compared to FeSi72, it provides more consistent metallurgical results, especially in high-grade steels. FeSi72 may be used as a substitute when cost pressure is high, but it may require slightly higher consumption to achieve the same effect.
In foundry applications, FeSi65 and FeSi72 are more common. Since casting processes are generally less sensitive to ultra-low impurity levels, buyers often prioritize cost-performance ratio. However, for precision castings, FeSi75 is still preferred due to better control over graphite structure and fewer defects.
When compared to other silicon-based alloys (such as silicon metal), ferrosilicon offers a more economical solution because it already contains iron, making it directly compatible with molten steel without additional adjustments.
What factors should buyers consider when selecting a grade?
Professional buyers evaluate ferrosilicon grades based on more than just Si content. Key considerations include:
Application scenario: Steelmaking vs casting vs alloy production
Impurity limits: Especially Al, C, P, S content
Particle size: Such as 10–50 mm, 3–10 mm, or powder
Cost efficiency: Consumption per ton of steel vs unit price
Supplier consistency: Stability of composition across batches
For example, a steel mill producing high-quality structural steel will prioritize FeSi75 with low aluminum, while a foundry may choose FeSi72 or FeSi65 to optimize cost.
Summary
Ferrosilicon grades are primarily defined by silicon content, with FeSi75, FeSi72, and FeSi65 being the most commonly used worldwide. The selection depends on a balance between metallurgical performance and cost efficiency. FeSi75 offers the best performance, FeSi72 provides a cost-effective alternative, and FeSi65 is suitable for lower-end or casting applications.
FAQ – Common Procurement Questions About Ferrosilicon
1. Which ferrosilicon grade is best for steelmaking?
FeSi75 is generally the best choice due to its high silicon content and strong deoxidation ability. It ensures cleaner steel and more stable production results, especially for high-grade steels.
2. Can FeSi72 replace FeSi75?
Yes, in some cases. However, FeSi72 has slightly lower silicon content, so consumption may increase to achieve the same metallurgical effect. It is often chosen when cost reduction is a priority.
3. What particle size of ferrosilicon should I choose?
This depends on your process. Steelmaking typically uses 10–50 mm lumps, while foundries may use smaller sizes or powder for better reaction speed and uniformity.
4. What impurities should I pay attention to?
Aluminum (Al), carbon (C), phosphorus (P), and sulfur (S) are critical. For high-quality steel, low aluminum ferrosilicon is often required to avoid unwanted inclusions.
5. Is higher silicon content always better?
Not necessarily. While higher silicon improves performance, it also increases cost. The optimal choice depends on your specific application and budget.
6. How to ensure stable quality from suppliers?
Work with reliable manufacturers who provide consistent chemical analysis reports, batch traceability, and long-term supply stability. Sampling and third-party inspection are also recommended.
Ready to Source Stable Ferrosilicon Supply?
If you are looking for reliable ferrosilicon (FeSi75 / FeSi72 / FeSi65) with stable composition, competitive pricing, and fast delivery, we can support your procurement with factory-direct supply.
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