Other
Beryllium, chromium, hafnium, rhenium, thallium, cadmium, germanium, vanadium, gallium, indium and niobium (columbium), and articles of these metals, including waste and scrap: > Hafnium: > Other
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 8112.39.00.00
Hafnium Sponge
Porous hafnium metal produced by reducing hafnium tetrachloride with magnesium, used in nuclear reactor control rods and aerospace alloys. Classified under HTS 8112.39.00.00 as 'other' hafnium not specified elsewhere in the hafnium heading, distinct from unwrought forms like powder or bars.
Hafnium Master Alloy Ingot
Compact ingot of hafnium with trace elements for alloying in superalloys, used in jet turbine blades. Falls under HTS 8112.39.00.00 as 'other' articles of hafnium, provided hafnium content is ≥99% and not unwrought powder.
Hafnium Reactor Control Rod Segments
Machined hafnium segments for nuclear reactor control rods that absorb neutrons. Classified in HTS 8112.39.00.00 as 'other' hafnium articles due to specific nuclear fabrication beyond basic wrought forms.
Hafnium Evaporation Pellets
Small hafnium pellets used in vacuum deposition for thin-film coatings in semiconductors and optics. HTS 8112.39.00.00 covers these as 'other' hafnium articles, not basic unwrought powder.
Hafnium Wire for Additive Manufacturing
High-purity hafnium wire spooled for laser powder bed fusion in aerospace prototyping. Classified under HTS 8112.39.00.00 as 'other' wrought hafnium products beyond standard profiles.
Recovered Hafnium Machining Scrap
Clean hafnium turnings and chips from aerospace component machining, suitable for remelting. Under HTS 8112.39.00.00 as 'other' hafnium including processed scrap forms, separate from raw waste.
Hafnium Foil for Superalloy Cladding
Thin hafnium foil sheets used to clad nickel superalloy turbine blades for oxidation resistance. HTS 8112.39.00.00 for 'other' hafnium sheet/foil beyond basic thicknesses.
Hafnium Getter Alloy Discs
Sintered hafnium discs with zirconium for vacuum tube getters absorbing residual gases. Classified HTS 8112.39.00.00 as hafnium-dominant (>99%) 'other' articles.
High-Purity Hafnium Granules
Granular hafnium (>99.95% pure) for plasma spray coatings on rocket nozzles. HTS 8112.39.00.00 treats sized granules as 'other' beyond unwrought powder specs.
Hafnium Crucible Liners
Custom-machined hafnium liners for crystal growth crucibles in semiconductor production. Under HTS 8112.39.00.00 as specialized 'articles' of hafnium.