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 is compacted or sintered into articles.
Compacted or sintered hafnium articles would not be unwrought and would fall under other tariff items.
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 classify as unalloyed hafnium; provide a certificate of analysis
• Ensure the sponge is not contaminated with other metals
• Check if the sponge is subject to any nuclear non-proliferation controls if destined for reactor use
Related Products under Tariff item 8112.31.00
Hafnium Metal Powder
Fine hafnium metal powder, with 90% or more passing through a 1 mm sieve, used in powder metallurgy 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 parts. It is a powder of hafnium, falling under tariff item 8112.31.00, which includes hafnium powders in any form, including those for 3D printing.
Hafnium Scrap from Reactor Manufacturing
Waste and scrap hafnium clippings and turnings generated during machining of nuclear control rod components. These are metal goods definitely not usable as such due to cutting-up, falling under tariff item 8112.31.00 as hafnium waste and scrap.
Hafnium Turning Waste
Machining turnings and swarf from hafnium rod production for superalloys. These are waste and scrap of hafnium, not usable as original products, and are covered by tariff item 8112.31.00 for 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 in their current form, and are covered by tariff item 8112.31.00.
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 is classified as unwrought hafnium under tariff item 8112.31.00, which includes unwrought forms such as ingots.