Silicon Metal 421 | Price & Specification

 

Silicon Metal 421 is a widely used grade of industrial silicon, with a typical composition of Si ≥ 99.0%, Fe ≤ 0.40%, Al ≤ 0.20%, and Ca ≤ 0.10%. Metallurgical silicon grade 421 is commonly used in aluminum alloy manufacturing, silicone production, and metallurgical applications. Compared with standard grades, Si 421 offers better control of aluminum and other impurities, helping improve batch consistency. For buyers who want more stable raw materials without the cost of ultra-high-purity grades, industrial silicon 421 is often a practical choice. We can provide tailored packaging solutions and FOB quotations based on your quantity, application, and shipping requirements.

Get A Quote Now

 

Item	Standard Value
Si (Silicon)	≥99.0 %
Fe (Iron)	≤0.40 %
Al (Aluminum)	≤0.20 %
Ca (Calcium)	≤0.10 %
Particle Size	10–30 / 30–50 / 50–100 mm
Bulk Density	1.8–2.2 g/cm³
Melting Point	~1410 °C
Package	1MT jumbo bag / 25kg bag

 

• Packing can be arranged in standard bags, jumbo bags, or other customized forms
• Common size ranges include 0–10 mm and 10–100 mm
• T/T and L/C are both available for payment
• Delivery is usually arranged within 10 working days after prepayment
• Samples and third-party inspection reports can be provided upon request

 

Metallurgy and Deoxidation

In metallurgical processing, Silicon Metal 421 is used as a silicon source and deoxidizing material. Its controlled impurity levels help support more stable furnace performance and raw material consistency during steelmaking and related industrial processes. For users who need a practical balance between chemical control and procurement cost, 421 is a commonly selected grade.

Silicone and Chemical Manufacturing

Silicon Metal 421 is also used in silicone-related production, including silicone oil, silicone rubber, and silicone resin. Compared with more common lower-control grades, its Fe, Al, and Ca limits are clearer and more stable, which makes it suitable for chemical processing applications that require more predictable raw material quality.

Refractory and High-Temperature Materials

Because silicon-based materials are widely used in high-temperature industrial environments, Silicon Metal 421 can also serve as a supporting raw material in certain refractory and heat-resistant material applications. In these cases, buyers usually value its stable chemical composition and practical cost level.

Aluminum Alloy Production

Silicon Metal 421 is commonly used as an alloying material in aluminum processing. With Si ≥99.0% and relatively controlled Al content at ≤0.20%, it is suitable for applications where buyers need a more stable raw material than standard grades. It is often used in aluminum alloy production for automotive parts, construction profiles, and general casting applications where consistency between batches matters.

If your production requires stable impurity control and suitable particle size, we can provide corresponding specification suggestions and FOB quotations based on your actual needs.

Get A Quote Now

 

 

Q:What is the FOB price of Silicon Metal 421?

A:The FOB price of Silicon Metal 421 depends on order quantity, particle size, packing method and loading port. Please feel free to contact us with your detailed demand, and we will provide you with the latest and most accurate quotation promptly.[Get A Quote Now]

Q:What is the chemical specification of Silicon Metal 421?

A:The standard specification of Silicon Metal 421 is Si ≥99.0%, Fe ≤0.40%, Al ≤0.20%, and Ca ≤0.10%. Custom size and packing are available upon request.

Q:What are the main applications of Silicon Metal 421?

A:Silicon Metal 421 is mainly used in aluminum alloy production, steelmaking deoxidation, organic silicone manufacturing, refractory materials and other general industrial fields.

Q:What affects the price of Silicon Metal 421?

A:The price of silicon metal 421 is mainly affected by raw material and electricity costs, market supply and demand, order volume, particle size, packing type and export shipping requirements.

Q:What is the difference between Silicon Metal 421 and 553?

A:Compared with silicon metal 553, Silicon Metal 421 has stricter control over Fe, Al and Ca impurities, providing better batch stability and making it more suitable for aluminum alloy and high‑demand industrial applications.

Q:Can we get a sample before placing an order?

A:Yes, small samples are available for quality testing. Please contact us to confirm sample size, shipping cost and delivery details.

 

 

 

Hot Tags: silicon metal 421 | price & specification, China silicon metal 421 | price & specification manufacturers, suppliers, factory