Other
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 > Other > Other
Duty Rate (from China)
Subheadings
Products classified under Tariff item 6903.90.00
Alumina Ceramic Retort
A high-alumina ceramic retort designed for laboratory pyrolysis and gas synthesis reactions at temperatures exceeding 1600°C. This product is a refractory ceramic good, fired after shaping, and falls under tariff item 6903.90.00 as an 'other' refractory article. Its pure oxide composition and high-temperature resistance make it essential for chemical processing applications.
Alumina Crucible
A high-purity alumina ceramic crucible used for melting and holding metals or chemicals at high temperatures in laboratories and foundries. This product is a refractory ceramic good, fired after shaping, and falls under tariff item 6903.90.00 as an 'other' refractory article. Its ability to withstand extreme temperatures and chemical corrosion makes it suitable for demanding metallurgical processes.
Ceramic Ladle Plunger
A zirconia-graphite ceramic plunger for stirring molten steel in secondary refining ladles. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its high-fired construction provides extreme corrosion resistance, essential for steelmaking immersion devices.
Ceramic Pug Mill Nozzle
A silicon carbide nozzle for high-pressure ceramic pug mills extruding clay products. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its resistance to abrasive clay slips and high temperatures makes it suitable for industrial ceramic processing equipment.
Cordierite Kiln Support Shelf
A cordierite ceramic shelf supporting pottery ware during high-temperature kiln firing. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its low thermal expansion and high-temperature resistance make it ideal for kiln furniture in the ceramic industry.
Cupel for Fire Assay
A magnesia ceramic cupel absorbing lead in precious metal fire assay analysis. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its bone ash-magnesia fired composition is specifically designed for metallurgical testing applications.
Graphite Crucible with Clay Bond
A clay-bonded graphite crucible for non-ferrous metal melting in jewelry and investment casting. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its graphite-carbon composite construction meets Chapter 69 firing requirements and provides excellent thermal resistance.
Magnesia Slide Gate Plate
A magnesia-carbon ceramic slide gate plate for controlling molten steel flow in ladle casting. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its high-fired construction withstands temperatures above 1700°C, making it essential for steelmaking applications.
Reaction-Bonded Silicon Carbide Nozzle
A reaction-bonded silicon carbide ceramic nozzle for powder metallurgy spray drying applications. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its ability to survive abrasive high-velocity flows makes it suitable for industrial processing.
Refractory Ceramic Bushing
A zirconia ceramic bushing guiding wires through high-temperature galvanizing furnaces. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its extreme thermal cycling resistance makes it ideal for continuous processing applications.
Refractory Ceramic Furnace Muffle
A high-alumina ceramic muffle protecting furnace heating elements from process atmosphere. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its fired ceramic construction is designed for industrial heat treatment applications.
Refractory Ceramic Rod for Kiln Cars
A high-alumina ceramic leveling rod for kiln car ware supports in sanitaryware firing. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its engineered design maintains flat firing surfaces at temperatures above 1400°C.
Silicon Carbide Thermocouple Tube
A silicon carbide ceramic tube sheathing thermocouples in high-temperature furnaces up to 1600°C. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its composition of fired nonmetallic materials provides excellent thermal protection for industrial applications.
Silicon Nitride Thermowell
A silicon nitride ceramic thermowell protecting temperature sensors in petrochemical furnaces. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its advanced nitride ceramic construction is designed for high-corrosion environments.
Zirconia Nozzle for Continuous Casting
A refractory zirconia ceramic nozzle used in steel mills for controlling molten metal flow during continuous casting. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its engineered design withstands extreme thermal and mechanical stress in industrial applications.