Ferrosilicon 75 (FeSi75) is one of the most widely used alloys in the global steel and foundry industries. If you are a steelmaker, foundry operator, or procurement professional looking for a reliable ferrosilicon supplier, this guide covers everything you need to know — from product specifications to sourcing from China.
Ferrosilicon is an alloy of iron and silicon. The number "75" refers to the silicon content — FeSi75 contains approximately 75% silicon and 25% iron, along with trace amounts of aluminum and calcium.
It is produced by smelting silica (SiO₂) and iron together in a submerged arc furnace at temperatures exceeding 1,800°C, using coke or coal as a reducing agent.
| Grade | Silicon Content | Main Application |
|---|---|---|
| FeSi45 | ~45% Si | Cast iron inoculation |
| FeSi65 | ~65% Si | Steelmaking deoxidizer |
| FeSi72 | ~72% Si | Steelmaking, standard grade |
| FeSi75 | ~75% Si | Most common grade, steelmaking & casting |
FeSi75 is the most widely traded grade globally because it offers the best balance between metallurgical performance, production cost, and transportation safety.
When molten steel contains excess oxygen, it weakens the final product. FeSi75 is added to the furnace to react with and remove this oxygen, producing cleaner, higher-quality steel. This is the single largest application of ferrosilicon worldwide.
Silicon improves the strength, hardness, and heat resistance of steel. FeSi75 is used to produce silicon steels, spring steels, tool steels, and electrical steels.
In the foundry industry, ferrosilicon is used as an inoculant to improve the microstructure of gray and ductile iron castings, enhancing mechanical properties and reducing defects.
FeSi75 is a key reducing agent in the Pidgeon process for producing magnesium metal.
| Parameter | Typical Value |
|---|---|
| Silicon (Si) | 74.0% – 76.0% |
| Iron (Fe) | Balance |
| Aluminum (Al) | ≤ 1.5% |
| Calcium (Ca) | ≤ 0.5% |
| Carbon (C) | ≤ 0.1% |
| Phosphorus (P) | ≤ 0.04% |
| Sulfur (S) | ≤ 0.02% |
| Particle Size | 10–100mm (customizable) |
Custom sizes and specifications are available upon request to meet specific production requirements.
Key markets with strong FeSi75 demand include Egypt, Vietnam, Saudi Arabia, Kazakhstan, Thailand, and the UAE, where steel production and construction activity are growing rapidly.
China accounts for over 70% of global ferrosilicon production, making it the world's largest and most competitive supplier. Chinese ferrosilicon offers:
Major Chinese ferrosilicon production bases include Ningxia, Inner Mongolia, Shaanxi, and Gansu, where coal-based power keeps production costs competitive.
Tianjin Global Alloy Material Co., Ltd. is a professional manufacturer and exporter of ferrosilicon and silicon metal based in China. We supply FeSi72 and FeSi75 to steel mills, foundries, and trading companies across the Middle East, Southeast Asia, Central Asia, and North Africa.
Q: What is the minimum order quantity for ferrosilicon 75? A: We offer flexible MOQ to accommodate both trial orders and bulk purchases. Contact us to discuss your specific requirements.
Q: What is the current price of ferrosilicon 75? A: Ferrosilicon prices fluctuate based on market conditions, raw material costs, and order volume. Contact Tianjin Global Alloy Material Co., Ltd. for the latest pricing and a customized quote.
Q: Can you provide SGS inspection and quality certificates? A: Yes. We provide Certificate of Analysis (COA), SGS third-party inspection reports, and all required export documentation.
Q: Do you ship to the Middle East and Southeast Asia? A: Yes. We regularly export ferrosilicon to Egypt, Saudi Arabia, the UAE, Vietnam, Thailand, and Kazakhstan, among other markets.
Q: What is the difference between FeSi72 and FeSi75? A: FeSi72 contains approximately 72% silicon and FeSi75 contains approximately 75% silicon. FeSi75 provides slightly higher deoxidation efficiency and is the more commonly specified grade in international steel procurement.
If you are looking for a reliable ferrosilicon 75 supplier with factory-direct pricing and stable supply, Tianjin Global Alloy Material Co., Ltd. is ready to serve your needs.
📧 Contact us today to receive product specifications, pricing, and availability. 🌐 www.globalalloymaterial.com
We respond to all inquiries within 24 hours.
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