Rhenium Thermionic Filament
Coiled rhenium filaments for thermionic emission in vacuum tubes and electron microscopes. As manufactured articles, under HTS 8112.49.00.00. Pure rhenium form.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 4% | +25.0% | 29% |
| 🇲🇽Mexico | 4% | — | 4% |
| 🇨🇦Canada | 4% | — | 4% |
| 🇩🇪Germany | 4% | — | 4% |
| 🇯🇵Japan | 4% | — | 4% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in microwave tubes or valves
Assembled into thermionic tubes under Chapter 85.
Not sure which classification is right?
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Import Tips & Compliance
• Vacuum packaging essential to prevent oxidation
• Technical drawings aid classification review
• ITAR checks for microscopy defense applications
Related Products under HTS 8112.49.00.00
Rhenium Sputtering Target
A high-purity disc or rectangular plate of rhenium used in physical vapor deposition for thin-film coating in electronics manufacturing. Classified under HTS 8112.49.00.00 as an article of rhenium, distinct from unwrought forms. Its purity exceeds 99% rhenium content, meeting chapter definitions for base metals.
Rhenium Wire for Thermocouples
Fine-diameter wire composed primarily of rhenium, alloyed minimally for use in high-temperature thermocouples in industrial furnaces. Falls under HTS 8112.49.00.00 as an article of rhenium, not qualifying as unwrought due to its drawn form. Exceeds 99% rhenium by weight per Chapter 81 alloy exclusion.
Rhenium Foil for Catalysts
Thin rhenium foil sheets used as a substrate or promoter in petroleum reforming catalysts. Classified in HTS 8112.49.00.00 as other rhenium articles, separate from waste/scrap or unwrought. High purity ensures it fits base metal definitions excluding alloys.
Rhenium Crucible for Crystal Growth
Cylindrical rhenium crucible vessels for high-temperature crystal growth in semiconductor production. HTS 8112.49.00.00 covers this fabricated article of rhenium, not base unwrought metal. Conforms to chapter notes with predominant rhenium content.
Rhenium Powder Sintered Parts
Sintered components like bushings made from rhenium powder for superalloy applications in turbines. As fabricated articles, they enter under HTS 8112.49.00.00, distinct from raw powders. Meets purity thresholds excluding Chapter 81 alloys.
Rhenium Electrical Contact Points
Riveted or welded rhenium tips for high-reliability electrical contacts in switches and relays. Classified as other rhenium articles in HTS 8112.49.00.00. High rhenium purity avoids alloy provisions.