What Is Ferro Silicon Nitride? Properties, Specifications, and 2026 Industry Guide

Published: December 05, 2025 | Last Updated: August 10, 2026 | By Technical Metallurgy Dept.

Key Takeaways

High-Efficiency Additive: Ferro Silicon Nitride (FeSiN) is a vital nitrogen-bearing alloy used to enhance high-strength steel and refractory materials.

Phase Purity: High-grade FeSiN typically contains ≥28% Nitrogen and ≥45% Silicon, primarily as the Si3N4 phase.

Strategic Benefits: It serves as a cost-effective alternative to Nitrided Ferro Manganese, improving grain refinement and deoxidation.

1. Understanding Ferro Silicon Nitride (FeSiN)

Ferro Silicon Nitride is a specialized ferroalloy composite consisting primarily of silicon nitride (Si₃N₄), metallic iron, and ferrosilicon. It is manufactured via high-temperature nitridation of ferrosilicon powder in a nitrogen-rich environment (1200°C to 1600°C).

Chemical Composition & Standard Specifications

Depending on the application (refractory vs. steelmaking), the nitrogen and silicon levels vary. Below are the typical parameters for export-grade Ferro Silicon Nitride, verified against YB/T 4333-2013 standards.

Chemical Component	High Purity Grade (Typical)	Industrial Grade (Typical)
Nitrogen (N)	≥ 30.0%	≥ 25.0%
Silicon (Si)	47.0% - 52.0%	45.0% - 48.0%
Iron (Fe)	12.0% - 15.0%	15.0% - 20.0%
Carbon (C)	≤ 0.1%	≤ 0.5%
Oxygen (O)	≤ 1.5%	≤ 2.5%

2. Primary Applications in Metallurgy

Steelmaking Additives

In the production of Cold-Rolled Oriented (CGO) silicon steel and high-strength low-alloy (HSLA) steel, FeSiN provides stable nitrogen addition. It promotes grain refinement and precipitation strengthening, enhancing the yield strength and toughness of the final product without the high costs associated with nitrogen gas injection.

Refractory Materials (Taphole Clay)

For large blast furnaces, Ferro Silicon Nitride is a critical component of taphole clay (mud gun clay). It improves the material's corrosion resistance to molten iron and slag, enhances thermal shock stability, and ensures the longevity of the furnace lining.

3. Ferro Silicon Nitride vs. Conventional Ferrosilicon

Our advantage

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Ferro Silicon Nitride (FeSiN)

Function: Combined Nitrogen & Silicon addition.

Hardness: Superior (due to Si3N4 ceramic phase).

Best For: HRB400/500 steel, Refractory clay.

Standard Ferrosilicon (FeSi)

Function: Pure deoxidation and Silicon alloying.

Hardness: Metallic hardness only.

Best For: General cast iron and carbon steel.

4. Latest Export Market Insights (August 2026)

The global demand for Ferro Silicon Nitride remains robust, particularly in Southeast Asia and the Middle East. Current FOB China prices are influenced by raw ferrosilicon costs and industrial electricity rates. Buyers should prioritize suppliers compliant with ISO 9001:2015 and those providing third-party inspection (SGS/BV) certificates for nitrogen content.

Request 2026 Price List & TDS

Frequently Asked Questions (FAQ)

Q: What are the standard particle sizes for FeSiN?A: Common sizes include 0-3mm, 1-5mm, and 200 mesh powder, depending on whether it is used as a steel additive or for refractory slurry.

Q: Is Ferro Silicon Nitride moisture-sensitive?A: While it is relatively stable, it should be stored in a dry, ventilated area to prevent surface oxidation or clumping in fine powder grades.

References & Technical Data Sources:

Metallurgical Industry Standard of PRC: YB/T 4333-2013 (Ferrosilicon Nitride).

National Standard of PRC: GB/T 28312-2012 (Nitrogen-bearing ferrosilicon).

ASTM International: ASTM A144 (Standard Specification for Ferrosilicon - Contextual Reference).

ZhenAn Internal Laboratory Quality Reports (2025-2026 Data).

What is the price of ferro silicon nitride today?

Here's a table summarizing today's (September 2024) China export prices of ferro silicon nitride (FSN), including pricing terms, product grades, destination markets, and key influencing factors. All prices are based on current market inquiries, exchange rates (USD/CNY ≈ 7.3), and typical trade conditions.

Ferro Silicon Nitride (FSN) – China Export Prices Today (September 2024)

No.	Destination / Region	Grade / Specification	FOB China Port (USD/MT)	CIF Destination Port (USD/MT)	Typical Port of Shipment	Key Influences Today
1	India	Ordinary (Si₃N₄ ≈ 30%, 100 mesh)	1,100 – 1,300	1,250 – 1,450	Tianjin / Qingdao	10–15% import duty; peak steel demand post-monsoon
1	India	High Purity (Si₃N₄ ≥ 50%, 200 mesh)	1,800 – 2,200	1,950 – 2,350	Tianjin / Qingdao	Anti-dumping risk for high purity; strong local demand
2	Vietnam	Ordinary	1,050 – 1,250	1,200 – 1,400	Fangcheng / Shanghai	China–ASEAN FTA = 0% tariff; rising steel capacity transfer
2	Vietnam	High Purity	1,700 – 2,100	1,850 – 2,250	Fangcheng / Shanghai	Short shipping distance keeps freight low ($50–80/MT)
3	Germany	Ordinary	1,300 – 1,500	1,450 – 1,650	Shanghai / Ningbo	EU anti-dumping 5–10% on high-purity; CE needed
3	Germany	High Purity	2,200 – 2,600	2,350 – 2,750	Shanghai / Ningbo	Premium refractories demand; higher logistics cost
4	Italy	Ordinary	1,320 – 1,520	1,470 – 1,670	Shanghai / Ningbo	Euro strength pushes up price; CE mark mandatory
4	Italy	High Purity	2,250 – 2,650	2,400 – 2,800	Shanghai / Ningbo	High-end metallurgy buyers prefer high purity
5	USA	Ordinary	1,400 – 1,600	1,550 – 1,750	Shanghai / Lianyungang	ASTM A144 compliance; no extra tariff; long freight
5	USA	High Purity	2,400 – 2,800	2,550 – 2,950	Shanghai / Lianyungang	EV battery sector demand; ocean freight $200–300/MT
6	Canada	Ordinary	1,420 – 1,620	1,570 – 1,770	Qingdao / Shanghai	Winter freight surcharge +10–15%; clean raw material need
6	Canada	High Purity	2,450 – 2,850	2,600 – 3,000	Qingdao / Shanghai	Refractory upgrade driven by environmental rules
7	Saudi Arabia	Ordinary	1,200 – 1,400	1,350 – 1,550	Qingdao / Shanghai	Vision 2030 infra projects; zero local production
7	Saudi Arabia	High Purity	2,000 – 2,400	2,150 – 2,550	Qingdao / Shanghai	Import-dependent market; stable demand
8	UAE	Ordinary	1,180 – 1,380	1,330 – 1,530	Shanghai / Ningbo	Re-export hub; GCC tariff-free among members
8	UAE	High Purity	1,950 – 2,350	2,100 – 2,500	Shanghai / Ningbo	Prices affected by regional re-export demand
9	Brazil	Ordinary	1,250 – 1,450	1,400 – 1,600	Shanghai / Shenzhen	BRL weakness increases landed cost; iron ore industry use
9	Brazil	High Purity	2,100 – 2,500	2,250 – 2,650	Shanghai / Shenzhen	Mining sector refractories; freight $120–180/MT
10	Turkey	Ordinary	1,280 – 1,480	1,430 – 1,630	Lianyungang / Shanghai	Steel output #2 in Europe; transit role for Eurasia
10	Turkey	High Purity	2,150 – 2,550	2,300 – 2,700	Lianyungang / Shanghai	Black Sea shipping risks affect freight stability

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What is Ferro Silicon Nitride?