Silica-Alumina Backup Refractory Brick
Backup layer refractory brick with balanced silica and alumina content exceeding 50% combined, fired for furnace hot repair and lining support. It provides thermal insulation and structural integrity in industrial furnaces. Classified under 6902.20.00 as a refractory brick with high alumina-silica content.
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 brick is not a constructional good but a refractory article
Other refractory ceramic articles are classified in heading 6903.
If the brick contains more than 50% magnesia, lime or chromium
Different oxide composition changes the subheading.
If the brick contains mica or is based on mineral substances
Mica-based articles are classified in Chapter 68.
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 combined alumina and silica content exceeds 50% by weight and the brick is fired
• Have documentation ready showing the exact composition for CBSA inspection
• Check if the brick is considered a constructional good; if not, heading 6903 may apply
Related Products under Tariff item 6902.20.00
70% Alumina Kiln Brick
A kiln brick composed of 70% alumina, designed for pottery and glass kilns, providing superior refractoriness. It is shaped and fired to maintain structural integrity at temperatures exceeding 1700°C, making it a refractory ceramic constructional good.
70% Alumina Refractory Brick
A standard 70% Al2O3 refractory brick fired for use in glass tank regenerator checkers and cement kilns. It is a constructional ceramic good exceeding 50% alumina, meeting the requirements of this tariff item.
70% Alumina Refractory Checker Brick
70% alumina refractory checker bricks are perforated bricks with 70% Al2O3 content, used in regenerator chambers of glass furnaces to promote heat recovery. These high-fired ceramic blocks meet Chapter 69 firing requirements and are classified as refractory constructional goods.
90% Alumina Refractory Brick
A refractory brick composed of 90% alumina for superior thermal shock resistance in high-heat environments. It is a fired ceramic constructional good shaped for boiler and incinerator linings, meeting the requirements of this tariff item.
Alumina Lining Brick for Steel Ladles
High-purity alumina bricks with over 70% alumina, fired for lining steel melting ladles. They resist molten steel erosion at temperatures over 1600°C. Classified under 6902.20.00 as refractory constructional goods for metallurgical furnaces.
Alumina Refractory Anchor Brick
Specialized hooked bricks of high-alumina content for anchoring fiber modules in furnace linings, fired to endure thermal cycling. They are constructional refractories for insulation systems in boilers. Classified under 6902.20.00 as refractory bricks with high alumina content.