Pure Hafnium Sponge
Porous hafnium sponge produced by reduction of hafnium tetrachloride, an intermediate unwrought form before further processing. It is classified as unwrought hafnium under tariff item 8112.31.00, which includes unwrought forms such as sponge.
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 |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the sponge contains alloying elements exceeding 1% by weight
Alloyed hafnium is classified under the 'other' tariff item for hafnium, not as unwrought.
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 hafnium content is at least 99% by weight to qualify as 'not alloyed' per Chapter 81 Supplementary Note 1(a)
• Provide a certificate of analysis from the manufacturer
• Ensure the sponge is free of impurities that could affect its classification
Related Products under Tariff item 8112.31.00
Hafnium Metal Powder
Fine hafnium metal powder, typically produced by atomization or reduction processes, used in powder metallurgy for manufacturing high-strength alloys and thermal spray coatings for aerospace turbines. It is classified as a powder of hafnium under tariff item 8112.31.00, which covers unwrought hafnium, waste and scrap, and powders.
Hafnium Powder for Additive Manufacturing
Spherical hafnium powder optimized for laser powder bed fusion in additive manufacturing of aerospace components. As a powder of hafnium, it falls under tariff item 8112.31.00, which includes hafnium powders, regardless of the specific production method or particle shape.
Hafnium Scrap from Reactor Manufacturing
Waste and scrap hafnium clippings and turnings generated during machining of nuclear control rod components. These materials are not usable as such and are classified as hafnium waste and scrap under tariff item 8112.31.00, which explicitly covers waste and scrap of hafnium.
Hafnium Turning Waste
Machining turnings and swarf from hafnium rod production for superalloys. These are waste and scrap of hafnium, not usable as finished articles, and are classified under tariff item 8112.31.00, which covers hafnium waste and scrap.
Recycled Hafnium Clippings
Clean hafnium clippings from precision machining operations, suitable for remelting. These are waste and scrap of hafnium, as they are not usable as finished articles, and are classified under tariff item 8112.31.00, which covers hafnium waste and scrap.
Unwrought Hafnium Metal Ingot
A pure hafnium ingot in unwrought form, typically produced by vacuum arc melting for use in nuclear reactor control rods and aerospace components. It falls under tariff item 8112.31.00 as unwrought hafnium, which includes ingots and other primary forms.