441 Grade Silicon Metal is a premium industrial silicon grade defined by its strict impurity control and high purity-with a silicon content of ≥99.0% and key impurities limited to Fe ≤0.4%, Al ≤0.4%, and Ca ≤0.1%. Chemically stable at room temperature (resistant to water and acids) yet reactive under controlled conditions, it is available in flexible forms (lump, powder, particles) and sizes (0~1mm to 10~100mm). As a versatile raw material, it excels in aluminum alloy production, polysilicon synthesis, silicone manufacturing, and steelmaking-delivering consistent performance for high-value industrial applications worldwide.

441 grade silicon metal

Key Specifications of Silicon Metal 441

Chemical Composition

441 Silicon Metal is defined by its high purity and strict impurity control. Below is the detailed, industry-standard composition (all values in weight percentage, %):

Component	Si (Silicon)	Fe (Iron)	Al (Aluminum)	Ca (Calcium)	P (Phosphorus)	S (Sulfur)
Specification	≥99.0%	≤0.4%	≤0.4%	≤0.1%	≤50 PPM	≤0.01%

Grade Comparison

To help users understand si441 Grade's value, here's a benchmark against common industrial silicon grades:

Grade	Si (Min)	Fe (Max)	Al (Max)	Ca (Max)	Core Advantage	Ideal Applications
441	99.0%	0.4%	0.4%	0.1%	Balanced purity & cost	Aluminum alloys, polysilicon, silicone
553	98.5%	0.5%	0.5%	0.3%	Cost-effective	General steelmaking, basic alloys
3303	99.3%	0.3%	0.3%	0.03%	Ultra-low impurities	High-end semiconductors
2202	99.5%	0.2%	0.2%	0.02%	Premium purity	Advanced electronics

Physical Properties & Customization

Shape Options: Lump (standard), Powder, Particles (tailored to processing needs)
Size Ranges: 0~1mm, 1~3mm, 10~50mm, 10~60mm, 10~100mm, or custom sizes per request
Packaging: Ton bags (moisture-resistant, standard) or customized packaging (25kg bags, bulk containers) to prevent oxidation
Key Traits: High melting point (≈1414°C), good thermal conductivity, semiconductor properties, corrosion resistance (reacts only with strong alkalis at room temperature)

silicon metal

Core Product Advantages

High Purity (≥99.0%): Lower impurity levels than 553 grade, ensuring better performance in precision applications (e.g., polysilicon, high-grade alloys).

Balanced Cost-Effectiveness: More affordable than premium grades (3303, 2202) while meeting mid-to-high-end industrial requirements.

Stable Chemical Properties: Resists unwanted reactions at room temperature, simplifying storage and handling.

Versatile Compatibility: Seamlessly integrates into alloy production, chemical synthesis, and electronics manufacturing-no process adjustments needed.

Flexible Customization: Tailored shapes, sizes, and packaging to match specific production line needs (e.g., fine powder for silicone, lumps for steelmaking).

Product Uses

Aluminum alloy production:

It is an important additive in aluminum alloy production. It can improve the strength, hardness, wear resistance and corrosion resistance of aluminum alloys, improve the casting performance of aluminum alloys, and make them easier to process and shape. It is widely used in automobiles, aerospace, construction and other fields.

Polysilicon production:

It can be used as the raw material for the production of polysilicon. After a series of purification and processing techniques, high-purity polysilicon can be obtained for the manufacture of solar cells, semiconductor devices, etc. It plays an important role in the new energy and electronic information industries.

Silicone production:

In the silicone chemical industry, it is the basic raw material for the production of silicone monomers, silicone oils, silicone rubbers and other products, giving silicone products good high temperature resistance, low temperature resistance, electrical insulation, waterproof and other properties, and is widely used in construction, chemical, electronics, medical and other industries.

Other fields:

It can also be used to produce ferrosilicon alloys. As a deoxidizer and alloying agent in the steel industry, it can improve the quality and performance of steel. In the production of some special ceramics and refractory materials, it can also be used as an additive to improve the product's high temperature resistance, wear resistance and other properties.

441 Grade silicon Metal

Why Choose Our 441 Grade Silicon Metal?

As a trusted manufacturer and supplier of industrial silicon in China, we adhere to international quality standards (ISO 9001, ASTM) and implement full-process quality control. Our Silicon Metal Grade 441 is exported to Europe, North America, Southeast Asia, and the Middle East, trusted for its consistency and reliability.

FAQ
Q: How is 441 grade different from 553 grade silicon metal?

A: 441 grade has higher silicon purity (≥99.0% vs. 98.5%) and lower impurities (Fe/Al/Ca), making it better for precision applications (polysilicon, high-grade alloys). 553 grade is more cost-effective for basic uses.
Q: Can 441 grade be used for solar panels?

A: Yes! It's a key raw material for polysilicon, which is processed into solar cell wafers-its high purity ensures efficient energy conversion.
Q: What packaging options do you offer?

A: Standard ton bags (moisture-resistant) or customized 25kg bags/bulk containers. We can also add anti-oxidation coatings for long-term storage.

Contact us today for a customized quote, sample request, or technical consultation-let our 441 Grade Silicon Metal power your production efficiency!

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