Silicon Metal Si 441

Silicon Metal 441 (Si 441) is a premium-grade metallurgical silicon with a minimum purity of 99.0% silicon (Si) and tightly controlled impurity levels (Fe ≤0.4%, Al ≤0.4%, Ca ≤0.1%).It is widely used in high-performance applications such as aluminum alloys, silicones, polysilicon for solar cells, and specialty chemicals. Compared to standard grades like Si 553, Si 441 offers higher purity and better consistency, making it ideal for industries requiring strict impurity control.

Description

Key Specifications (ISO 9001 / GB/T 2881-2014)

Element	Content (%)
Silicon (Si)	≥99.0
Iron (Fe)	≤0.4
Aluminum (Al)	≤0.4
Calcium (Ca)	≤0.1
Other Impurities	≤0.1 (combined)

Form: Silver-gray crystalline lumps (standard sizes: 10–100mm, or customized)

Packaging: 1-ton jumbo bags, 25kg bags, or bulk shipment

Density: ~2.33 g/cm³

Melting Point: ~1,410°C

silicon metal

Primary Applications of silicon metal

(1) Aluminum Alloys (Foundry & Automotive)

Enhances strength, castability, and corrosion resistance in aluminum-silicon (Al-Si) alloys.

Used in automotive parts, aerospace components, and machinery manufacturing.

(2) Silicones & Chemical Industry

Key raw material for silicone polymers, resins, and silanes (used in sealants, adhesives, and lubricants).

Preferred for high-purity chemical synthesis due to low impurity content.

(3) Solar & Semiconductor Industry

Further refined into polysilicon for photovoltaic (PV) solar cells and electronic-grade silicon.

Critical for monocrystalline and multicrystalline silicon production.

(4) Refractories & Advanced Materials

Used in high-temperature ceramics and refractory materials for steelmaking and furnaces.

Improves thermal shock resistance and durability.

silicon metal

Advantages of Si 441

Higher Purity – Lower Fe, Al, and Ca content compared to Si 553, ensuring better performance in sensitive applications.
Consistent Quality – Strict production control for uniform chemical composition.
Versatility – Suitable for both metallurgical and chemical industries.
Cost-Effective – Balances purity and price, making it a preferred choice for mid-to-high-end applications.

Market & Supply Chain

Major Producers: China, Brazil, Norway, Russia, and the U.S.

Pricing Factors:

Energy costs (electricity-intensive production)

Quartzite supply (raw material availability)

Downstream demand (solar, automotive, and construction sectors)

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