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Ferrosilicon

Ferrosilicon is a ferroalloy composed of silicon and iron, and is one of the most important deoxidizers and alloying additives in the steelmaking and casting industries.

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product description

Ferrosilicon is an iron-silicon alloy produced by the reduction smelting of coke, steel scrap, and quartz (or silica) in an electric furnace at high temperatures ranging from 1,500°C to 1,800°C. It has a melting point of 1,200–1,250°C and a density of approximately 6.8–7.2 g/cm³.

Because silicon readily combines with oxygen to form silicon dioxide (SiO₂), ferrosilicon serves as a deoxidizer in steelmaking; the formation of SiO₂ releases significant heat, which helps raise the temperature of the molten steel. Additionally, ferrosilicon is used as an alloying agent in the production of low-alloy structural steel, spring steel, bearing steel, heat-resistant steel, and electrical silicon steel, and it frequently acts as a reducing agent in the ferroalloy and chemical industries.

Product Classification

In accordance with GB/T 2272-2020 Standard, ferrosilicon is classified into four major categories based on silicon content and main impurity elements:

Category	Code	Quantity of Grades	Silicon Content Range	Main Characteristics
High Silicon Ferrosilicon	GG	9	87.0%～97.0%	Extremely high silicon content and ultra-low impurities; suitable for high-end special steel and electrical silicon steel
Plain Grade Ferrosilicon	PG	10	40.0%～80.0%	Widely used with high cost performance; for general steelmaking deoxidation and alloying
Low Aluminum Ferrosilicon	DL	8	72.0%～80.0%	Strictly controlled aluminum content; applicable to steel grades with special limits on aluminum
High Purity Ferrosilicon	GC	13	75.0%～80.0%	Rigorous control of various impurities; for high-quality special steel and precision casting

III. Product Grades and Chemical Composition

Name: Ferrosilicon
SKU: 0

1. High Silicon Ferrosilicon (GG)

There are 9 grades of high silicon ferrosilicon with silicon content ranging from 87.0% to 97.0%. Representative grades are listed below:

表

Grade	Chemical Composition (Mass Fraction, %)
	Si Min/Range	C (max)	Mn (max)	P (max)	Fe (max)
GG FeSi97Al1.5	Min 97.0	0.20	0.40	0.04	1.5
GG FeSi93Al3.0	93.0–95.0	0.20	0.40	0.04	2.5

2. Plain Grade Ferrosilicon (PG)

Plain grade ferrosilicon includes 10 grades and is the most widely used ferrosilicon product:

Grade	Chemical Composition (Mass Fraction, %)
	Si Range	Al (max)	Mn (max)	P (max)	S (max)	Cr (max)
PG FeSi80	78.0–82.0	—	0.40	0.035	0.020	0.30
PG FeSi75	74.0–80.0	—	0.40	0.035	0.020	0.30
PG FeSi72Al2.5	Min 72.0	2.5	—	0.040	0.020	—
PG FeSi70Al2.0	Min 70.0	2.0	—	0.040	0.020	—
PG FeSi65	65.0–72.0	—	0.60	0.040	0.020	0.50
PG FeSi45	40.0–47.0	—	0.70	0.040	0.020	0.50
PG FeSi40	40.0–47.0	—	—	—	—	—

Note: PG FeSi72Al2.5 is the benchmark delivery product for ferrosilicon futures, with Si ≥72.0%, P ≤0.04%, S ≤0.02% and C ≤0.2%.

3. Low Aluminum Ferrosilicon (DL)

Low aluminum ferrosilicon has 8 grades with strictly limited aluminum content:

Grade	Chemical Composition (Mass Fraction, %)
	Si Range	Al (max)	P (max)	S (max)
DL FeSi75Al0.5	72.0–80.0	0.5	0.040	0.020
DL FeSi75Al1.0	72.0–80.0	1.0	0.040	0.020
DL FeSi75Al1.5	72.0–80.0	1.5	0.040	0.020

Note: TFeSi75-D is low-titanium & low-aluminum ferrosilicon, with Si ≥74%, C ≤0.02%, Al ≤0.20%, Ti ≤0.04%, S ≤0.01%, P ≤0.04%.

4. High Purity Ferrosilicon (GC)

High purity ferrosilicon covers 13 grades with strict control of multiple impurity elements:

Grade	Chemical Composition (Mass Fraction, %)
	Si Range	C (max)	Al (max)	Ca (max)	Mn (max)	Cr (max)	P (max)	S (max)
GC FeSi75Ti0.01-A	74.0–80.0	—	—	—	—	—	—	—
GC FeSi75Ti0.03-C	74.0–80.0	—	—	—	—	—	—

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Q1: Are you a manufacturer or a trading company?
A: We are a professional metal products manufacturer based in Shandong, China, with our own production facilities and a strong supply chain. We specialize in carbon steel and stainless steel products, with over 100,000 tons of stock available year-round.

Q2: Where is your company located? Can I visit your factory?
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Q3: What products does your company mainly supply?
A: We mainly supply carbon steel and stainless steel products in various forms, including plates, pipes, coils, bars, structural steel (H-beam, channel steel, angle steel), and customized metal components. We cover a full range of specifications to meet diverse customer needs.

Q4: Do you support OEM or customized orders?
A: Yes. We have years of experience in product customization. We can produce according to your drawings, samples, or specific technical requirements. Please contact us with your customization needs.

Q5: What material grades do you offer?
A: For carbon steel, we offer grades such as A36, S235JR, Q235, Q345, and more. For stainless steel, we offer 304, 304L, 316, 316L, 201, 430, and other common grades. Custom grades are available upon request.

Q6: How do you guarantee product quality?
A: Our factory operates under strict QA/QC standards. Every product is inspected during production and before shipment to ensure it meets agreed quality specifications. We can provide mill test certificates and accept thirdparty inspections upon request.