Containing by weight more than 50% of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)
Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths. > Containing by weight more than 50% of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2) > Containing by weight more than 50% of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)
Duty Rate (from China)
Products classified under Tariff item 6903.20
Alumina Ceramic Retort for Chemical Processing
Fired alumina retort containing over 80% alumina (Al2O3) by weight, used for high-temperature chemical reactions and distillation processes. This refractory vessel withstands corrosive environments and thermal shock, meeting the criteria for refractory ceramic goods under tariff item 6903.20.00.
6903.20.00Alumina Ceramic Support for Catalyst Bed
High-alumina ceramic support structures containing over 65% alumina (Al2O3) by weight, fired after shaping at temperatures exceeding 800°C. These refractory goods are used in industrial catalyst beds within petrochemical processing, providing structural integrity at elevated temperatures.
6903.20.00Alumina Crucible for Laboratory Use
High-purity alumina crucible containing over 90% alumina (Al2O3) by weight, designed for melting and holding metals or chemicals in laboratory furnaces. Fired after shaping at temperatures exceeding 800°C, it qualifies as a refractory ceramic good under tariff item 6903.20.00.
6903.20.00Alumina-Silica Kiln Furniture Shelf
Refractory kiln furniture shelf made from a 60% alumina-40% silica mixture, used for supporting ware in ceramic kilns. This high-temperature fired ceramic is designed for repeated thermal cycling, qualifying under tariff item 6903.20.00 as a refractory ceramic good.
6903.20.00Alumina Thermocouple Protection Tube
Fired alumina ceramic tube containing 99% alumina (Al2O3), used to protect thermocouples in high-temperature furnaces and kilns. This essential refractory component for temperature measurement in industrial processes falls under tariff item 6903.20.00.
6903.20.00High-Alumina Ceramic Nozzle for Continuous Casting
Refractory nozzle made from an alumina-silica mixture containing over 70% alumina (Al2O3), used in steel continuous casting to control molten metal flow. This fired ceramic construction withstands extreme temperatures and qualifies under tariff item 6903.20.00.
6903.20.00High-Alumina Plug for Steel Ladle
Refractory alumina plug containing 75% alumina (Al2O3), used in steel ladle stopper assemblies for molten metal control. This precision-engineered, high-fired ceramic component qualifies under tariff item 6903.20.00 as a refractory ceramic good.
6903.20.00High-Purity Alumina Ceramic Rod for Kilns
High-purity alumina ceramic rod made from 99.5% alumina (Al2O3), used as support in high-temperature kilns and sintering furnaces. This fired refractory good provides structural support under extreme thermal conditions, meeting the criteria for tariff item 6903.20.00.
6903.20.00Precision Alumina Ceramic Tube for Thermowells
High-precision alumina ceramic tube made from 96% alumina (Al2O3), used for protecting temperature sensors in harsh industrial environments. This refractory fired construction is designed for continuous high-temperature service, qualifying under tariff item 6903.20.00.
6903.20.00Refractory Alumina Slide Gate Plate
High-alumina ceramic plate containing 85% alumina (Al2O3), used in steel ladle slide gate systems to control molten steel flow. This precision-fired refractory component is essential for steelmaking and falls under tariff item 6903.20.00.