Parts
Converters, ladles, ingot molds and casting machines, of a kind used in metallurgy or in metal foundries, and parts thereof: > Parts
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 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 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(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Subheadings
Products classified under HTS 8454.90.00
Czochralski Crystal Puller Ingot Mold
A precision ingot mold designed for Czochralski crystal growers used in semiconductor wafer production from high-purity silicon. It shapes the monocrystalline boule during the pulling process in metallurgical crystal growth. Classified under 8454.90.00 as an ingot mold part for metallurgy.
Float Zone Crystal Grower Ladle Liner
A replaceable liner for ladles in float zone semiconductor crystal growing furnaces, used in metal foundry processes for purifying silicon rods. It withstands high temperatures during zone melting in metallurgy. Falls under 8454.90.00 as parts of casting machines for metallurgy.
Semiconductor Wafer Casting Converter Nozzle
High-precision nozzle for converters in silicon casting machines used in metallurgy for semiconductor wafer production. It controls molten silicon flow during ingot formation in foundries. Classified in 8454.90.00 as converter parts for metallurgical casting.
Crystal Boule Casting Ladle Assembly
Modular ladle assembly for ingot casting machines in semiconductor metallurgy, handling molten polysilicon for boule formation. Used in metal foundries for wafer precursor production. HTS 8454.90.00 covers such ladle parts.
Silicon Ingot Mold Grinding Fixture
Fixture part for holding ingot molds during precision grinding in semiconductor metallurgy preparation. Ensures diameter accuracy for crystal boules used in wafer slicing. As a part of casting machine tooling, it's under 8454.90.00.
Metallurgical Casting Machine Refractory Lid
Refractory lid for converters and ladles in silicon casting machines for semiconductor foundries. Maintains thermal containment during molten metal handling in metallurgy. Classified as 8454.90.00 parts.
Semiconductor Ladle Tilt Mechanism
Hydraulic tilt mechanism part for ladles in metallurgical casting machines producing silicon ingots for wafers. Enables precise pouring control in foundries. HTS 8454.90.00 for such ladle parts.
Ingot Mold Cooling Jacket
Water-cooled jacket surrounding ingot molds in semiconductor casting machines for controlled crystallization rates. Used in metal foundries for uniform silicon boule quality. Parts of 8454.90.00.
Casting Converter Graphite Crucible Insert
Graphite insert for crucibles in converters used for silicon melting in semiconductor metallurgy. Provides high-purity containment during casting. Under 8454.90.00 as converter parts.
Silicon Foundary Ladle Pour Lip
Replaceable pour lip for ladles in silicon casting machines, ensuring clean flow for semiconductor ingot molds. Critical wear part in metallurgical foundries. HTS 8454.90.00 parts.