Sintered Tungsten Bar Stock for Heat Sinks
Unwrought tungsten bars from sintering, raw stock for thermal management heat sinks in electronics and military applications. Under HTS 8101.94.00.00 for simple sintered forms with superior heat dissipation. High density aids in compact designs.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pre-shaped for heat sink profiles
Machined or extruded forms are 'other' wrought articles of tungsten.
If parts of computing machinery
Heat sinks assembled into electronic equipment classified by assembly.
If containing >50% carbides
Sintered carbide products shift to Chapter 68 'articles of stone/plaster'.
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Import Tips & Compliance
• Thermal property certifications support classification and end-use declarations
• Ensure no pre-drilled holes or shapes that suggest 8101.99 classification
• ITAR compliance may apply for defense-related imports—check export controls
Related Products under HTS 8101.94.00.00
Sintered Tungsten Billet for Armor Penetrators
Large sintered tungsten billets used in depleted uranium-alternative kinetic energy penetrators for military applications. Covered by HTS 8101.94.00.00 as unwrought sintered bars with extreme density for armor-piercing. Supplied for defense contractors.
Sintered Tungsten Bar for Catalyst Substrates
Unwrought sintered tungsten bars serving as substrates for chemical reactor catalysts in ammonia synthesis. Under HTS 8101.94.00.00 for simple sintered form with catalytic surface properties. Resistant to hydrogen atmospheres.
Unwrought Tungsten Sintered Rod for Rocket Nozzles
Sintered tungsten rods machined into throats for solid rocket motor nozzles. HTS 8101.94.00.00 covers the unwrought sintered input material with ablation resistance. Used in space launch vehicles.
Sintered Tungsten Rod for Lamp Filaments
A high-purity tungsten rod produced by powder metallurgy sintering, used primarily in manufacturing incandescent and halogen lamp filaments. It qualifies under HTS 8101.94.00.00 as unwrought tungsten in rod form obtained simply by sintering, without further mechanical working. This form provides the necessary ductility and high melting point for filament applications.
Unwrought Sintered Tungsten Bar for Aerospace Alloys
Pure tungsten bars created through sintering process, supplied unwrought for melting into high-temperature aerospace superalloys. Classified under HTS 8101.94.00.00 due to being bars obtained simply by sintering without additional processing. Essential for turbine blades and rocket nozzles requiring extreme heat resistance.
Sintered Tungsten Ingot for X-Ray Shielding
Massive sintered tungsten ingots used as raw material for radiation shielding in medical and industrial X-ray equipment. Falls under HTS 8101.94.00.00 as unwrought tungsten bars/rods from simple sintering, prized for density and neutron absorption. No further refinement needed before machining into shields.