Containing by weight more than 50% of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)
Articles of stone or of other mineral substances (including carbon fibres, articles of carbon fibres and articles of peat), not elsewhere specified or included. > Other articles: > Other > 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 6903.20.00.00
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.
6903.20.00Alumina 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.
6903.20.00Alumina 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.
6903.20.00Alumina-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.
6903.20.00Alumina 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.
6903.20.00High-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.
6903.20.00High-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.
6903.20.00High-Purity Alumina Ceramic Rod for Kilns
High-purity alumina ceramic rods with 99.5% alumina content, fired for use as supports in high-temperature kilns and sintering furnaces. These refractory goods provide structural support under extreme thermal conditions, qualifying under tariff item 6903.20.00 as articles containing more than 50% alumina.
6903.20.00Precision Alumina Ceramic Tube for Thermowells
High-precision alumina ceramic tubes with 96% alumina content, used for protecting temperature sensors in harsh industrial environments. These refractory tubes are fired for continuous high-temperature service and qualify under tariff item 6903.20.00 as articles containing more than 50% alumina.
6903.20.00Refractory Alumina Slide Gate Plate
Refractory alumina slide gate plates containing 85% alumina by weight, fired for use in steel ladle slide gate systems to control molten steel flow. These precision-fired components are essential for steelmaking and qualify under tariff item 6903.20.00 due to their high alumina content.