Silicon Metal Lumps 10-100mm with COA

 

Silicon metal is an industrial silicon material made by smelting silica and carbon materials in an electric furnace. It is not pure laboratory silicon, but a bulk raw material used in aluminum alloy, silicone chemical production, metallurgy, foundry and other industrial applications. In purchasing, buyers usually judge silicon metal by grade, lump size, Si content and Fe, Al, Ca impurity control.

We supply silicon metal lumps 10-100mm with COA for buyers who need clear grade options, stable batch quality and export-ready packing.

If your order needs 10-50mm, 50-100mm, granules or powder, we can also confirm availability before quotation.

This product page covers common silicon metal grades, including 553, 441, 421, 3303, 2202 and 1101. You can choose the grade according to your required Si content and Fe, Al, Ca limits.
 

If you are comparing grades before purchase, you can start with our silicon metal grade selection guide.

 

 

For silicon metal, the grade is mainly decided by Si content and Fe, Al, Ca impurity control. Buyers usually check these values first before confirming an order.

Grade	Si Min	Fe Max	Al Max	Ca Max	Typical Buying Point
Silicon Metal 553	98.70%	0.50%	0.50%	0.30%	Cost control, general industrial use
Silicon Metal 441	99.10%	0.40%	0.40%	0.10%	Lower impurity than 553
Silicon Metal 421	99.00%	0.40%	0.20%	0.10%	Lower Al than 441
Silicon Metal 3303	99.37%	0.30%	0.30%	0.03%	Better Fe and Ca control
Silicon Metal 2202	99.58%	0.20%	0.20%	0.02%	Higher-purity industrial use
Silicon Metal 1101	99.79%	0.10%	0.10%	0.01%	Strict impurity requirement

Final composition should be confirmed by actual COA.

If you need general industrial material with stronger cost control, Silicon Metal 553 is often the first grade to compare.

When your process needs lower Al than 441, Silicon Metal 421 may be a better option.

For higher purity requirements, you can compare 3303, 2202 and 1101 according to your actual Fe, Al and Ca limits.

 

 

The main product on this page is silicon metal lumps 10-100mm. This size is practical for bulk shipment because it is easier to pack in jumbo bags and easier to handle during loading and unloading.

Product Form	Available Size
Silicon Metal Lumps	10-50mm, 10-60mm, 10-100mm, 50-100mm, 100-200mm
Standard Packing	1MT or 1.25MT waterproof jumbo bags
Optional Packing	10kg / 25kg waterproof inner bag

If your furnace or downstream customer has a strict size range, tell us before quotation. We can confirm whether the size can be supplied directly or needs screening.

 

 

We can provide COA for silicon metal lumps. The COA helps you check whether the actual batch matches the agreed grade.

COA Item	What It Helps You Check
Si	Main silicon purity
Fe	Iron impurity control
Al	Aluminum impurity control
Ca	Calcium impurity control
Batch No.	Shipment traceability
Size	Whether the goods match order requirement
Test Result	Whether the batch meets agreed specification

For industrial buyers, COA is not just a document. It is the basic quality proof for factory acceptance, resale, customs files and internal purchasing records.

Before shipment, you can use our silicon metal COA inspection checklist to review the key items.

If your company needs independent inspection, SGS, BV or other third-party inspection can be arranged before shipment.

Consult Our Engineers

 

Standard packing is 1MT jumbo bag. For some routes or warehouse conditions, waterproof inner bags are recommended.

Item	Supply Information
Standard Packing	1MT jumbo bag
Inner Packing	10kg / 25kg waterproof bag by request
MOQ	1 ton
Loading Port	Tianjin, Shanghai, Guangzhou or other Chinese ports
Trade Terms	FOB, CIF, CFR
Payment Term	T/T or L/C
Delivery Time	Usually 7-15 days for stock goods
Inspection	SGS, BV or third-party inspection by request
Documents	COA, Packing List, Invoice, B/L, Certificate of Origin, Insurance Certificate if required

 

Get Live Quote

Tell us your destination port, order quantity and packing requirement. We can quote by FOB, CIF or CFR and confirm the estimated delivery time.

 

 

Silicon metal lumps are used in aluminum alloy production, silicone chemical materials, metallurgy, foundry, refractory materials and other industrial fields.

For aluminum alloy production, buyers usually care about stable Si content and impurity limits. 553, 441, 421 and 3303 are often compared according to cost and quality requirement.

For chemical-related use, Fe, Al and Ca control becomes more important. In this case, buyers may need higher grades such as 3303, 2202 or 1101.

For metallurgical or foundry use, size and packing also matter. 10-100mm lumps are easier for bulk handling than fine powder, especially when the order is shipped in jumbo bags.

If you want to understand how different grades are used, check our different grades and uses of silicon metal article.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ZhenAn focuse on metallurgical raw materials and industrial silicon products. For silicon metal orders, we do not only send a price list. We help you confirm whether the grade, size, packing and COA match your real purchasing requirement.

You can work with us when you need:

• Multiple silicon metal grades from one supply channel
• 10-100mm lump material for bulk orders
• COA and test report for batch confirmation
• 1MT jumbo bag export packing
• Waterproof inner packing by request
• Third-party inspection support
• FOB, CIF or CFR quotation
• Stable repeated supply

Send us your required grade, size, quantity and destination port. We will help confirm specification, packing, documents and quotation.

 

Send Inquiry Now

 

 

 

Q1: What is the standard packaging to prevent silicon metal lumps from breaking during sea transit?

A1: We pack our silicon metal lumps in heavy-duty 1MT or 1.25MT waterproof jumbo bags (PP bags), with an optional 10kg/25kg inner bag by request. This secure packing minimizes fines (crushed powder) and moisture contamination during rough ocean transit and forklift handling at the destination port.

Q2: How do I know which silicon metal grade (553, 441, 421, 3303) fits my furnace?

A2: The choice depends heavily on your application and impurity tolerance:

Silicon Metal 553 / 441: The standard choice for aluminum alloy plants and smelters focused on cost control.

Silicon Metal 421 / 3303: Ideal for chemical material producers or steelmakers requiring lower Iron (Fe) and Calcium (Ca) limits. If you are unsure, just send us your target chemical composition and application, and our technical team will confirm the most cost-effective grade.

Q3: Do you provide a certified COA (Certificate of Analysis) for every batch of 10-100mm silicon metal?

A3: Yes, absolutely. Every single shipment of our 10-100mm silicon metal lumps undergoes strict laboratory batch testing before loading. The certified COA (Certificate of Analysis) indicating the exact Silicon (Si) purity and max limits of Fe, Al, and Ca will be provided with your shipping documents. Third-party inspections like SGS or BV are also supported by request.

Q4: What is your monthly supply capacity for silicon metal lumps, and what is the typical lead time?

A4: Our production facilities maintain a robust monthly supply capacity of 3,000 MT for industrial silicon. For standard stocked grades like Silicon Metal 553 and 441 (10-100mm), our typical lead time is 7-15 days to main Chinese loading ports (such as Tianjin, Shanghai, or Guangzhou) after order confirmation.

Hot Tags: Silicon Metal Lumps 10-100mm with COA, China Silicon Metal Lumps 10-100mm with COA manufacturers, suppliers, factory, high strength metals, 1101 Si Metal Lump, energy metal products, drill metal products, Silicon Metal 3303 2202 1101, Industrial Silicon 441