What is the price of Ferrophosphorus today? Phosphate iron Price Per Ton
| Phosphate iron prices in major regions of China on June 2 | ||||||
| Product Name | Specification | Steel mill/origin | price | rise and fall | Remark | unit |
| Phosphorus iron | P24 | Sichuan | 3750-3900 | - | National standard, ton bag packaging, ex-factory price including tax | Yuan/ton |
| Phosphorus iron | P24 | Guizhou | 515.5 | - | USD/ton | |
| Phosphorus iron | P24 | Henan | 3400-3500 | - | National standard, 10-50mm ton bags | Yuan/ton |
| Phosphorus iron | P24 | Yunnan | 3000-3200 | - | National standard, 10-80mm ton bags | Yuan/ton |
What is Ferrophosphorus and What Is It Used For in Steelmaking?
Low-Cost Alloying & Deoxidizing Material for Steel and Foundry Applications
Ferrophosphorus Alloy | P 18%–26% | Fe Balance | Lump & Powder Supply for Metallurgy
✔ Phosphorus Content: 18% – 26%
✔ Iron Content: Balance (Fe 70%–80%)
✔ Available Forms: Lump (10–50mm), Crushed Powder (0–10mm)
✔ Melting Behavior: Medium melting alloy additive
✔ Application: Steelmaking, cast iron, alloy modification
✔ Function: Deoxidizer + alloying + machinability enhancer
Ferrophosphorus is an iron–phosphorus alloy produced as a by-product during the manufacture of yellow phosphorus. It is widely used in metallurgy as an alloying additive and deoxidizer, especially in steel and cast iron production.
What Is Ferrophosphorus and How Is It Produced in Metallurgy?
Ferrophosphorus is produced during the electrothermal reduction of phosphate rock in submerged arc furnaces. During phosphorus production, a by-product slag phase forms, which contains iron and phosphorus. This material is then cooled, crushed, and processed into ferrophosphorus alloy.
The production route makes it a cost-efficient secondary ferroalloy, widely used in metallurgical industries where controlled phosphorus addition is required.
What Are the Typical Specifications of Ferrophosphorus?
| Parameter | Specification |
|---|---|
| Phosphorus (P) | 18% – 26% |
| Iron (Fe) | 70% – 80% |
| Silicon (Si) | ≤ 2.0% |
| Carbon (C) | ≤ 1.0% |
| Manganese (Mn) | ≤ 0.5% |
| Sulfur (S) | ≤ 0.1% |
| Form | Lump / Powder |
| Size | 0–10mm / 10–50mm |
Why Is Ferrophosphorus Important in Steelmaking?
Ferrophosphorus is used primarily as a controlled phosphorus source and auxiliary alloying agent in steel production.
Main roles in steelmaking:
Improves hardness and tensile strength
Enhances wear resistance
Supports machinability in free-cutting steels
Acts as a secondary deoxidizer in some steel grades
However, phosphorus must be carefully controlled because excessive levels can cause brittleness in steel.
What Role Does Phosphorus Play in Steel Properties?
Phosphorus affects steel behavior in both positive and negative ways depending on concentration.
Positive effects:
Increases strength and hardness
Improves corrosion resistance in low-carbon steels
Enhances machinability in free-cutting grades
Negative effects:
Reduces toughness at high concentration
Causes cold shortness in structural steel
This is why ferrophosphorus is used under strict dosage control.
How Is Ferrophosphorus Used in Steelmaking?
Ferrophosphorus is added during secondary metallurgy or casting stages.
It dissolves into molten steel and adjusts composition for:
Alloy strengthening
Machining performance improvement
Specific steel grade formulation
It is especially common in:
Free-cutting steel
Low-carbon alloy steel
Cast iron modification
Can Ferrophosphorus Improve Steel Machinability?
Yes. Controlled phosphorus addition improves chip formation during machining, reducing tool wear and increasing production efficiency.
This is why ferrophosphorus is widely used in:
Screw steel
Automotive machining parts
Precision mechanical components
What Are the Main Applications of Ferrophosphorus?
Steel Industry
Used in alloy steel and special free-machining steels.
Foundry Industry
Improves casting performance and wear resistance.
Chemical Industry
Used in phosphorus-based chemical processing.
Mechanical Manufacturing
Used in precision parts requiring machinability optimization.
How Is Ferrophosphorus Different from Other Ferroalloys?
| Alloy Type | Main Element | Function |
|---|---|---|
| Ferrophosphorus | P + Fe | Machinability, alloying |
| Ferrosilicon | Si + Fe | Deoxidation |
| Ferromanganese | Mn + Fe | Strength & desulfurization |
Key Difference:
Ferrophosphorus is mainly a functional alloy modifier, not a primary strengthening ferroalloy like FeMn.
What Factors Affect Ferrophosphorus Quality?
Phosphorus content stability (P%)
Iron matrix purity
Impurity control (S, C levels)
Particle size consistency
Cooling and solidification process
High stability ensures predictable metallurgical performance.
Why Ferrophosphorus Matters in Metallurgy
Ferrophosphorus is a cost-effective alloying and functional additive used to adjust steel properties, particularly machinability and strength. While it must be carefully controlled due to phosphorus sensitivity, it remains an important material in specialized steel and casting applications.
FAQ
What is ferrophosphorus and how is it produced?
It is an iron–phosphorus alloy by-product from phosphorus production.
It forms during phosphate reduction in electric furnaces and is processed into usable alloy form.
What is the typical composition of ferrophosphorus?
It typically contains 18–26% phosphorus.
The remainder is mainly iron with small amounts of silicon and carbon.
How is ferrophosphorus used in steelmaking?
It is used as an alloying and property-modifying additive.
It adjusts strength, hardness, and machinability in controlled steel grades.
What effect does phosphorus have on steel?
It increases strength but may reduce toughness.
Proper control is required to balance mechanical properties.
Can ferrophosphorus improve machinability?
Yes, it significantly improves machining performance.
Phosphorus helps form chips that are easier to break during cutting.
What industries use ferrophosphorus?
It is used in steel, casting, and mechanical manufacturing.
It is valuable wherever controlled steel performance is required.
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