Alumina Ceramic Support for Catalyst Bed
High-alumina ceramic support structures containing over 65% alumina by weight, fired at high temperatures for use in industrial catalyst beds within petrochemical processing. These refractory goods provide structural integrity and thermal stability, qualifying under tariff item 6903.20.00 as articles containing more than 50% alumina.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the alumina content is 50% or less
This item covers other refractory ceramic goods not meeting the alumina threshold.
If used specifically as laboratory ware
Ceramic laboratory articles may fall under this heading if not primarily refractory.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the alumina content exceeds 50% by weight and retain lab certificates to support classification
• Verify the goods are fired above 800°C to meet Chapter 69 note 1(b)
• Declare the product under 6903.20.00 and keep invoices detailing composition for CBSA review
Related Products under Tariff item 6903.20.00
Alumina Ceramic Retort for Chemical Processing
Fired alumina retorts containing over 80% alumina by weight, designed for high-temperature chemical reactions and distillation processes. These refractory vessels withstand corrosive environments and thermal shock, meeting the criteria for tariff item 6903.20.00 as articles with more than 50% alumina.
Alumina Crucible for Laboratory Use
High-purity alumina crucibles containing over 90% alumina by weight, fired above 800°C for laboratory use in melting metals or chemicals. These refractory articles meet the Chapter 69 note 1(b) firing requirement and qualify under tariff item 6903.20.00 due to their high alumina content.
Alumina-Silica Kiln Furniture Shelf
Refractory kiln furniture shelves made from a 60% alumina-40% silica mixture, fired at high temperatures for supporting ware in ceramic kilns. These goods contain more than 50% alumina and silica combined, meeting the criteria for tariff item 6903.20.00.
Alumina Thermocouple Protection Tube
Fired alumina ceramic tubes with 99% alumina content, designed to protect thermocouples in high-temperature furnaces and kilns. These refractory components are essential for temperature measurement and qualify under tariff item 6903.20.00 due to their high alumina content.
High-Alumina Ceramic Nozzle for Continuous Casting
Refractory nozzles made from an alumina-silica mixture with over 70% alumina content, fired for use in steel continuous casting to control molten metal flow. These ceramic components withstand extreme temperatures and qualify under tariff item 6903.20.00 due to their high alumina content.
High-Alumina Plug for Steel Ladle
High-alumina refractory plugs containing 75% alumina by weight, fired for use in steel ladle stopper assemblies for molten metal control. These precision-engineered ceramic components meet the criteria for tariff item 6903.20.00 as articles with more than 50% alumina.