Containing by weight more than 50 percent of free carbon
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 percent of free carbon
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 6903.10.00.00
Graphite Crucible for Metal Melting
High-density graphite crucible designed for melting precious metals like gold and silver in foundries. Contains over 50% free carbon by weight, fired after shaping from inorganic nonmetallic materials including graphite. Used in refractory applications for high-temperature resistance.
Carbon Graphite Nozzle for Continuous Casting
Refractory graphite nozzle used in steel continuous casting to control molten metal flow. Composed primarily of free carbon (>50% by weight) with refractory properties after high-temperature firing. Essential for industrial metallurgy processes.
Graphite Slide Gate Refractory for Steel Ladles
Slide gate plates made from high-carbon graphite for controlling molten steel flow in ladles. Exceeds 50% free carbon content, fired ceramic refractory goods designed for extreme temperatures. Critical component in steelmaking.
High-Carbon Graphite Retort for Laboratory Use
Sealed graphite retort vessel for high-temperature chemical reactions and distillation. Contains over 50% free carbon, fired after shaping per Chapter 69 requirements. Used in analytical and research laboratories.
Graphite Stopper Rod for Molten Metal Pouring
Refractory graphite stopper rod used to control molten steel pouring from ladles. High free carbon content (>50%) provides thermal shock resistance after ceramic firing process. Standard equipment in foundries.
Carbon Crucible for Aluminum Die Casting
Large graphite crucible specifically for melting aluminum alloys in die casting operations. Exceeds 50% free carbon by weight, fired refractory ceramic for non-ferrous foundries. Handles temperatures up to 1400°C.
Graphite Immersion Heater Tube
Protective graphite sheath tube for immersion heaters in molten metal baths. High free carbon content provides corrosion resistance in aggressive environments. Fired ceramic refractory tube per HTS 6903.
High-Purity Graphite Cupel for Fire Assay
Specialized graphite cupels used in fire assay for precious metal analysis. Contains over 50% free carbon, fired after shaping for analytical laboratory use. Absorbs lead button during precious metal parting.