Tungsten Nitride WN Powder from Japan
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.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include nitrogen content certification (>10% wt) to distinguish from pure tungsten metal
• Declare as UN3077 environmentally hazardous if particle size <100μm per IMDG regulations
• Watch for anti-dumping duties on Chinese-origin refractory metal compounds