Hafnium Sponge
Porous hafnium metal produced by reducing hafnium tetrachloride with magnesium, used in nuclear reactor control rods and aerospace alloys. This is a form of hafnium not specified elsewhere, classified as 'other' under this tariff item.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the sponge is considered unwrought hafnium
Unwrought hafnium is classified separately from other hafnium articles.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the sponge is not classified as unwrought hafnium powder, which would fall under a different subheading
• Provide the CBSA with the production method and intended use
• Ensure the hafnium content is at least 99% to qualify as 'not alloyed'
Related Products under Tariff item 8112.39.00
Hafnium Crucible Liners
Custom-machined hafnium liners designed for crystal growth crucibles used in semiconductor production. These are specialized articles of hafnium, fabricated to precise dimensions, and fall under this tariff item as 'other' articles of hafnium.
Hafnium Evaporation Pellets
Small hafnium pellets used in vacuum deposition processes for thin-film coatings in semiconductors and optics. These are not unwrought powder but fabricated articles of hafnium, classified as 'other' under this tariff item.
Hafnium Foil for Superalloy Cladding
Thin hafnium foil sheets used to clad nickel superalloy turbine blades for oxidation resistance. These are flat-rolled products of hafnium, not exceeding one-tenth of the width in thickness, and fall under this tariff item as 'other' hafnium articles.
Hafnium Getter Alloy Discs
Sintered hafnium discs with zirconium used as getters in vacuum tubes to absorb residual gases. These are hafnium-dominant articles, with hafnium content exceeding 99% by weight, and are classified as 'other' articles of hafnium.
Hafnium Master Alloy Ingot
Compact ingot of hafnium with trace elements used for alloying in superalloys, particularly for jet turbine blades. With hafnium content at or above 99%, this is classified as 'other' articles of hafnium, not unwrought powder.
Hafnium Reactor Control Rod Segments
Machined hafnium segments for nuclear reactor control rods that absorb neutrons. These are specialized articles of hafnium, fabricated for nuclear applications, and fall under this tariff item as 'other' hafnium articles.