Tungsten Boride WB2
Tungsten diboride (WB2) is an ultra-hard ceramic material used in wear-resistant coatings and cutting tools. Classified under HTS 2850.00.10.00 as a boride of tungsten, meeting chemically defined criteria. It exhibits high melting point and chemical stability for extreme environments.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sintered with carbon or classified as carbide-boride composite
Chapter notes exclude compounds also qualifying as carbides of heading 2849.
If shaped into finished refractory bricks or tiles
Worked or formed ceramic products of refractory materials shift to Chapter 69.
If in sintered metal matrix composite form
Tungsten-based cermets or worked forms fall under Chapter 81 for other base metals.
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Import Tips & Compliance
• Provide XRF or ICP analysis confirming tungsten-boron stoichiometry to validate subheading 2850.00.10
• Avoid bulk packaging over 25kg which may trigger hazardous material shipping declarations
• Confirm not mixed with carbon binders, as carbide exclusions apply per heading 2849
Related Products under HTS 2850.00.10.00
Tungsten Silicide Powder
Tungsten silicide (WSi2) is a refractory intermetallic compound used in microelectronics for gate electrodes and low-resistivity VLSI components. It falls under HTS 2850.00.10.00 as a chemically defined silicide of tungsten, distinct from carbides in heading 2849. The product is typically supplied as a fine gray powder for high-temperature applications.
Tungsten Nitride WN Powder
Tungsten nitride (WN) powder serves as a diffusion barrier in semiconductor manufacturing and decorative coatings. It qualifies for HTS 2850.00.10.00 as a chemically defined nitride of tungsten, not a carbide. The material offers high hardness and corrosion resistance.
Tungsten Hydride WH Powder
Tungsten hydride powder functions as a hydrogen storage material and catalyst precursor in chemical synthesis. It is classified under HTS 2850.00.10.00 as a hydride of tungsten per the heading scope for chemically defined compounds. The metastable compound decomposes at moderate temperatures.
Sodium Tungsten Borohydride
Sodium tungsten borohydride serves as a reducing agent in organic synthesis and fuel cell research. As a chemically defined boride complex of tungsten, it falls under HTS 2850.00.10.00, distinguished from simple salts by chapter note 6 on complex compounds. Typically white crystalline powder soluble in polar solvents.
Tungsten Azide W(N3)6
Tungsten hexakis(azide) is an energetic material used in pyrotechnics and airbag initiators. It classifies under HTS 2850.00.10.00 as a chemically defined azide of tungsten. The air-stable crystalline compound offers high detonation velocity.
Tungsten Silicide Sputtering Target
High-purity tungsten silicide sputtering targets deposit thin films for CMOS gates in semiconductors. As unworked silicide of tungsten, classified HTS 2850.00.10.00 before fabrication into wafers. Supplied as disc or rectangular blocks >99.9% pure.