Silicon metal (Si, purity is usually above 98%) has a wide range of functions and uses in the metallurgical industry, mainly relying on its unique physical and chemical properties. Silicon metal is mainly used as an alloy additive, deoxidizer, desulfurizer, raw material for producing ferrosilicon and other silicon alloys, and refractory materials in the metallurgical industry. Its importance lies in its ability to effectively improve the quality and performance of metallurgical products, especially in steel production, where it is essential to improve the strength, toughness, corrosion resistance and other mechanical properties of steel.

Silicon metal for metallurgy

Chemical composition

We offer a variety of metallurgical-grade silicon metal grades to meet the needs of different metallurgical processes. Common grades include Si553, Si441, Si3303, Si2202, and Si1101, where the numbers represent the upper limits for controlling the main impurity elements.

Grade	Si ≥ (%)	Fe ≤ (%)	Al ≤ (%)	Ca ≤ (%)	Typical Application
Si 1101	99.7	0.1	0.1	0.01	Ultra‑high purity alloys, semiconductor raw materials
Si 2202	99.5	0.2	0.2	0.02	High‑performance alloys, precision casting
Si 3303	99.3	0.3	0.3	0.03	High‑grade aluminum alloys, electrical steel
Si 441	99.1	0.4	0.4	0.1	General aluminum alloys, steel deoxidation
Si 553	98.5	0.5	0.5	0.3	Die‑casting, extrusion, mass production

Physical Form:

Blocks: 10-100mm, suitable for induction furnace feeding, reducing burn-off.

Granules/Powder: 0-3mm, 3-10mm, used for powder coating or as a fine alloy additive.

Customization: Customized products with special sizes or specific impurity element control can be provided according to customer requirements.

Packaging: 1-ton woven bags or bulk bags; moisture-proof and palletized packaging can also be provided upon customer request.

silicon metal powder

Core Application Areas

1) Iron & Steel Smelting

Deep Deoxidation: Reacts with oxygen in molten steel to form SiO₂, preventing porosity and improving ingot density.
Alloy Strengthening: Essential for electrical steel, enhancing magnetic permeability and reducing iron loss; improves elasticity and hardenability in spring steel and high‑strength steel.
Desulfurization & Purification: Helps remove harmful impurities, improving toughness and corrosion resistance.

2) Aluminum & Light Alloy Industry

Used in 6063/6061 extrusion profiles and ADC12/A380 die‑casting alloys.
Improves melt fluidity, castability, and wear resistance; supports automotive lightweighting.
Balances strength, ductility, and cost for mass production.

3) Foundry & Powder Metallurgy

Promotes graphitization in cast iron, improving machinability and hardness.
Used in powder metallurgy to produce high‑temperature and wear‑resistant parts.
Acts as an inoculant to refine grain structure and reduce defects.

4) Refractory & High‑Temperature Materials

Added to refractories to enhance heat resistance, wear resistance, and oxidation resistance.
Used in kiln furniture, thermocouple tubes, and high‑temperature structural components.

5) Organosilicon & New Energy Industries

Basic raw material for silicone monomers, rubber, oil, and resin.
Starting material for photovoltaic and electronic‑grade silicon purification.
Used in conductive materials, thermal coatings, and sealants.

6) Other Metallurgical Applications

Raw material for ferrosilicon, silicon‑aluminum, and other master alloys.
Reducing agent for high‑purity metal production.
Additive for copper, magnesium, and other non‑ferrous alloys.

Silicon metal for metallurgy