Cemented Tungsten Residue
Residue from cemented tungsten carbide grinding operations, predominantly tungsten compounds. Under HTS 2620.99.20.00 as other slag/ash for industrial metal recovery. Complies with chapter notes for non-iron residues.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sold as set with tungsten tools for retail
Tool plates/parts including residues in sets fall under Chapter 82.
If unground refined tungsten waste
Wrought or unwrought tungsten wastes under specific metal chapter.
If picked up as cobalt-tungsten pickle liquor residue
Specific metal pickling residues classify under Chapter 38.
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Import Tips & Compliance
• Lab certification of tungsten >50% content critical for customs
• Specify end-use in chemical/metal sectors to meet heading criteria
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 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.
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.