Ferro Silicon 65% – Product Introduction

Ferro Silicon 65% – Product Introduction

Ferro Silicon 65% (FeSi65) is one of the most widely used ferroalloys in the metallurgical industry, especially in steelmaking and foundry production. It is an alloy composed of approximately 65% silicon and the balance mainly iron, with controlled quantities of impurities such as aluminum, carbon, sulfur, and phosphorus. Its key roles include deoxidation, alloying, and improving the performance of steel and cast iron. Because of its high cost-performance ratio and excellent metallurgical effect, FeSi65 is a common substitute for higher-grade ferro silicon (such as FeSi72 / FeSi75), helping steel mills reduce alloy consumption while maintaining final product quality.

Ferro Silicon 65% is produced in electric arc furnaces using raw materials such as quartz, coke, and iron scrap. Through carbothermal reduction at extremely high temperatures, silicon is reduced from silica and combines with molten iron to form the alloy. After smelting, the product is crushed and processed into different size specifications according to customer requirements.

Compared with higher-grade ferro silicon, FeSi65 contains slightly lower silicon content but maintains strong reactivity. Its advantages include:

High deoxidation capacity in steelmaking

Stable alloying performance

Excellent cost-efficiency

Strong adaptability in various steel grades

Good fluidity and melting property

Thanks to these advantages, FeSi65 is favored by steel plants that aim to reduce alloying costs while preserving the metallurgical quality of steel.

In the steelmaking process, dissolved oxygen in molten steel can cause problems such as porosity, brittle steel, inclusions, and uneven structure. Ferro Silicon 65% serves as an important deoxidizer, helping eliminate excess oxygen effectively. The silicon in ferro silicon reacts with oxygen to form stable silicon oxide, allowing purified steel with improved cleanliness.

In addition, adding a suitable amount of FeSi65 improves:

Strength and hardness

Elasticity and wear resistance

Magnetic properties of certain steel grades

It is especially suitable for:

Carbon steel

Structural steel

Spring steel

Alloy steel

Tool steel

High-temperature steels

In cast iron production, Ferro Silicon 65% also demonstrates significant value. As an inoculant and spheroidizing agent, it contributes to:

Grain refinement

Promotion of graphite precipitation

Reduction of shrinkage tendency

Improvement of fluidity and machinability

By optimizing graphite morphology, FeSi65 helps manufacturers produce castings with better strength, elongation, and internal soundness, making it useful for machinery castings, engine castings, pipes, automotive components, and general industrial castings.

As raw material prices in the alloy industry fluctuate, many steel factories pursue high-efficiency yet cost-friendly alloying solutions. FeSi65 has become a popular option due to its excellent metallurgical performance combined with affordability. Compared with FeSi72 or FeSi75, using FeSi65 can significantly reduce unit production costs without compromising product performance, making it highly suitable for competitive steel markets.

In addition, its stable global availability provides a secure supply chain for long-term operations.

Common sizes include:

10–50 mm

10–100 mm

3–10 mm

0–3 mm powder
Customized sizing is available upon request.

1 MT Jumbo Bags

1 MT Jumbo Bags with waterproof liner

Customized packaging available for long-distance sea transportation

Our Ferro Silicon 65% is produced under strict quality control standards, ensuring consistent chemical composition, low impurity levels, and high metallurgical efficiency. We maintain:

Reliable and stable supply

Fast delivery through major ports

Competitive pricing for long-term cooperation

Professional documentation and after-sales service

With years of export experience, we are committed to providing high-quality alloy products and long-term partnerships with steel mills, foundries, and trading companies.