Tungsten Carbide Production Ash
Ash residue generated during the manufacture of tungsten carbide tools, rich in tungsten compounds. Falls under HTS 2620.99.20.00 due to its primary tungsten content and use in recovering metals for chemical compounds. Not from iron/steel making.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically processed into tungsten carbide powders
Carbides of tungsten are classified under Chapter 28 as chemical compounds, not residues.
If contaminated from ferro-tungsten alloy production
Ferrous residues from iron/steel-related processes exclude from heading 2620.
If containing mainly arsenic alongside tungsten
Arsenic-dominant residues have separate subheading within 2620.
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Import Tips & Compliance
• Submit lab analysis showing tungsten predominance without metal deductions
• Declare intended industrial application to comply with heading 2620 requirements
• Watch for reclassification if ash is suitable only for disposal, not extraction
Related Products under HTS 2620.99.20.00
Tungsten Smelting Slag
Residue from the smelting process of tungsten ores, primarily consisting of tungsten compounds and minor metal impurities. Classified under HTS 2620.99.20.00 as slag containing mainly tungsten, used in industry for metal recovery or chemical manufacturing. Excludes iron/steel production residues.
Tungsten Recovery Plant Ash
Ash from solvent extraction plants recovering tungsten from low-grade sources, mainly tungsten content. HTS 2620.99.20.00 covers this as industrial residue for further metal extraction or compounds. Excludes waste incineration products.
Spent Tungsten Catalyst Residue
Residue from deactivated petroleum catalysts containing primarily tungsten oxides. HTS 2620.99.20.00 applies to such ash used for tungsten recovery industrially. Excludes incinerated waste.
Tungsten Wire Drawing Slag
Slag byproduct from drawing tungsten wires for lighting, mainly tungsten particles. Under HTS 2620.99.20.00 as metal-containing residue for re-melting. Industrial use per chapter notes.
Hard Metal Alloy Slag
Slag from melting hard metal alloys where tungsten is the dominant component, used in tooling industries. HTS 2620.99.20.00 applies as other slag/residues containing mainly tungsten for metal extraction. Excludes municipal or iron/steel ash.
Tungsten Ore Roasting Residue
Residue from roasting tungsten-bearing ores, primarily tungsten oxides and compounds. Classified in HTS 2620.99.20.00 for non-iron/steel slag used in metal or chemical compound production. Meets chapter note for industrial application.