Unwrought tungsten, including bars and rods obtained simply by sintering
Tungsten (wolfram) and articles thereof, including waste and scrap: > Other: > Unwrought tungsten, including bars and rods obtained simply by sintering
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
Effective with respect to entries on or after January 1, 2025, articles the product of China, as provided for in subdivision (j) of U.S. note 31 to this subchapter
Products classified under HTS 8101.94.00.00
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.
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.
Pure Sintered Tungsten Rod for EDM Electrodes
High-density tungsten rods sintered for use in electrical discharge machining (EDM) electrodes in tool and die making. HTS 8101.94.00.00 covers this unwrought form, ideal for spark erosion due to melting point and conductivity. Supplied as-is for customer machining.
Unwrought Tungsten Sintered Rod for Welding Electrodes
Sintered pure tungsten rods serving as base material for thoriated or lanthanated TIG welding electrodes. HTS 8101.94.00.00 applies to this unwrought sintered form before doping. Critical for arc stability in high-precision welding.
High-Purity Sintered Tungsten Rod for Thermocouples
Sintered tungsten rods of 99.95% purity for Type C thermocouples in high-temperature furnaces and kilns. HTS 8101.94.00.00 for unwrought sintered rods enabling operation up to 2300°C. Raw material for sheathed thermocouple wires.