How much does a ferro silicon cost?
| China's export price of ferrosilicon on June 2 | ||||
| Unit: US dollars/ton | ||||
| product | Brand | Quotation | rise and fall | Remark |
| Ferrosilicon | 72 | 1150-1170 | -- | FOB Tianjin Port |
| Ferrosilicon | 75 | 1200-1220 | -- | FOB Tianjin Port |
What is Ferro Silicon 70 (FeSi70)?
Looking for a Cost-Effective Deoxidizer with Stable Silicon Content?
Ferro Silicon 70 (FeSi70) | Si ≥ 70% | Fast Deoxidation | Stable Metallurgical Performance
✔ Silicon Content: 70% Min
✔ Particle Sizes: 0-3mm, 3-10mm, 10-50mm, 10-100mm
✔ Low Al, Low C, Low P, Low S Available
✔ Suitable for Steelmaking, Foundry, and Casting Industries
✔ Consistent Batch Quality and High Recovery Rate
✔ Custom Packaging: 1MT Jumbo Bag / 25kg Bags
✔ Export Markets: India, Turkey, Egypt, Vietnam, Europe, South America
Ferro Silicon 70 (FeSi70) is one of the most widely used ferroalloys in steelmaking and foundry production because it provides efficient deoxidation, improves molten steel cleanliness, and offers a more economical alternative to higher-silicon grades in many applications.
What is Ferro Silicon 70 (FeSi70) and How Is It Used in Metallurgy?
Ferro Silicon 70, commonly known as FeSi70, is a ferroalloy composed primarily of iron and silicon, with a silicon content typically around 70%.
The material is mainly used as:
Deoxidizer in steelmaking
Inoculant in cast iron production
Alloying additive in special steel manufacturing
Reducing agent in metallurgical processes
During steelmaking, oxygen dissolved in molten steel reacts with silicon in FeSi70, forming stable oxides that float into slag. This process improves steel purity, reduces defects, and enhances mechanical properties.
Because FeSi70 contains slightly lower silicon than FeSi72 or FeSi75, many steel mills select it when balancing performance and production cost.
What Are the Typical Specifications of Ferro Silicon 70?
| Item | Specification |
|---|---|
| Silicon (Si) | ≥70% |
| Aluminum (Al) | ≤2.0% |
| Carbon (C) | ≤0.20% |
| Phosphorus (P) | ≤0.04% |
| Sulfur (S) | ≤0.02% |
| Size | 0-3mm, 3-10mm, 10-50mm, 10-100mm |
| Appearance | Silver Gray Lump |
| Packing | 1MT Jumbo Bag |
Why Is FeSi70 Used as a Deoxidizer in Steelmaking?
Steelmaking requires precise oxygen control.
Excess oxygen in molten steel can cause:
Blowholes
Surface defects
Poor mechanical properties
Inclusion formation
FeSi70 removes oxygen rapidly by forming silicon oxide compounds that enter the slag phase.
Compared with aluminum deoxidation alone, FeSi70 helps reduce overall alloy cost while maintaining steel cleanliness.
For many carbon steel and structural steel grades, FeSi70 delivers sufficient deoxidation efficiency without requiring higher-silicon ferroalloys.
How Does FeSi70 Improve Molten Steel Quality?
The silicon contained in FeSi70 contributes to several important metallurgical benefits.
Improved Steel Cleanliness
Oxygen content decreases significantly after deoxidation, reducing non-metallic inclusions.
Better Mechanical Properties
Cleaner steel generally exhibits improved tensile strength, ductility, and toughness.
More Stable Casting Performance
Reduced oxygen levels help minimize casting defects and improve yield.
Enhanced Process Control
Consistent silicon content allows steelmakers to achieve tighter chemistry tolerances.
Can FeSi70 Be Used as an Inoculant in Cast Iron Production?
Yes.
FeSi70 is frequently used as an inoculant for gray iron and ductile iron production.
When added before casting, FeSi70 promotes graphite nucleation and improves microstructure formation.
Benefits include:
Reduced chill tendency
Better machinability
Improved casting uniformity
Enhanced mechanical performance
Many foundries select FeSi70 because it provides effective inoculation while maintaining competitive production costs.
How Does FeSi70 Compare with FeSi72?
FeSi70 vs FeSi72
| Property | FeSi70 | FeSi72 |
|---|---|---|
| Silicon Content | ≥70% | ≥72% |
| Deoxidation Efficiency | Good | Higher |
| Alloy Recovery | Good | Better |
| Cost | Lower | Higher |
| Steelmaking Usage | Common | Common |
| Foundry Usage | Common | Common |
When Should Buyers Choose FeSi70?
FeSi70 is often selected when:
Cost optimization is important
Standard steel grades are produced
Large-volume consumption exists
Slightly lower silicon content is acceptable
How Does FeSi70 Compare with FeSi75?
FeSi70 vs FeSi75
| Property | FeSi70 | FeSi75 |
|---|---|---|
| Silicon Content | ≥70% | ≥75% |
| Purity | Standard | Higher |
| Deoxidation Strength | Moderate | Strong |
| Recovery Rate | Good | Excellent |
| Price | More Economical | Higher |
| Special Steel Suitability | Limited | Excellent |
Which Grade Is Better?
For ordinary carbon steel and general foundry production, FeSi70 often provides the best balance between cost and performance.
For premium alloy steel and demanding metallurgical applications, FeSi75 may deliver higher efficiency.
How Does FeSi70 Compare with Silicon Carbon Alloy?
FeSi70 vs Silicon Carbon Alloy
| Property | FeSi70 | Silicon Carbon Alloy |
|---|---|---|
| Silicon Content | Higher | Variable |
| Carbon Contribution | Low | Higher |
| Deoxidation Effect | Strong | Strong |
| Carburizing Ability | Limited | Excellent |
| Cost | Higher | Lower |
| EAF Steelmaking | Common | Increasingly Used |
Many EAF steel producers use Silicon Carbon Alloy as a partial replacement for FeSi70 when reducing alloy consumption costs.
However, FeSi70 remains preferred when precise silicon control is required.
What Industries Commonly Use Ferro Silicon 70?
FeSi70 is widely used in:
Steel Plants
For deoxidation and alloy adjustment.
Foundries
For inoculation and casting quality improvement.
Ferroalloy Production
As a reducing agent.
Welding Electrode Manufacturing
For flux and alloying applications.
Special Metallurgy
For controlled silicon addition.
What Factors Should Buyers Consider When Sourcing FeSi70?
Professional buyers typically evaluate:
Silicon Stability
Consistent Si content ensures predictable metallurgical performance.
Low Impurity Levels
Lower phosphorus and sulfur improve final steel quality.
Particle Size Accuracy
Uniform sizing enhances dissolution and recovery.
Supply Capacity
Reliable suppliers can support long-term production planning.
Quality Documentation
Mill test certificates and third-party inspections provide confidence in product consistency.
Why Choose ZhenAn as Your Ferro Silicon 70 Supplier?
ZhenAn supplies metallurgical-grade FeSi70 for steel mills, foundries, and alloy producers worldwide.
Advantages include:
Stable Si ≥70%
Strict impurity control
Customized particle sizes
Bulk export experience
Competitive factory pricing
Consistent batch-to-batch quality
Flexible packaging solutions
Summary: Is FeSi70 the Right Choice for Your Metallurgical Operation?
Ferro Silicon 70 is a cost-effective and reliable ferroalloy used extensively in steelmaking and foundry industries. It provides efficient deoxidation, improves steel cleanliness, supports cast iron inoculation, and offers excellent value for high-volume metallurgical operations.
For buyers seeking a balance between performance, supply stability, and cost control, FeSi70 remains one of the most practical ferroalloy choices available.
FAQ
What is Ferro Silicon 70 (FeSi70) and how is it used in metallurgy?
FeSi70 is an iron-silicon alloy containing approximately 70% silicon used mainly as a deoxidizer and inoculant.
It removes oxygen from molten steel and improves cast iron microstructure during metallurgical production.
What is the typical chemical composition of FeSi70?
FeSi70 typically contains at least 70% silicon with controlled levels of carbon, phosphorus, sulfur, and aluminum.
Exact specifications vary according to customer requirements and industry standards.
How does FeSi70 differ from FeSi72 and FeSi75 grades?
The primary difference is silicon content.
Higher silicon grades generally provide stronger deoxidation performance but at a higher cost.
Why is FeSi70 used as a deoxidizer in steelmaking processes?
FeSi70 effectively removes dissolved oxygen from molten steel.
Lower oxygen levels improve steel cleanliness, mechanical properties, and casting quality.
Can FeSi70 be used as an inoculant in cast iron production?
Yes, FeSi70 is commonly used as an inoculant.
It promotes graphite formation and improves casting structure and machinability.
What factors should buyers consider when sourcing Ferro Silicon 70 for industrial use?
Buyers should focus on silicon stability, impurity control, particle size consistency, and supplier reliability.
These factors directly affect metallurgical performance, recovery rate, and production costs.
Request a Ferro Silicon 70 Quotation Today
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Email: market@zanewmetal.com
WhatsApp: +86 15518824805
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