Loading...
U.S. imports of tungstates (wolframates) (HS 284180) totaled $47.2M in July 2026, traded with 9 countries.
Importers of Tungstates (Wolframates) paid $3.7M in duties in July 2026 — an effective duty rate of 9.8% on $37.7M in dutiable value, based on actual customs collections rather than the published tariff schedule. Tungstates (Wolframates) imports of $47.2M in July 2026 ran 85% above the year-to-date monthly average of $25.6M.
Last updated: July 2026 dataTungstates — also known by the older name wolframates — supply soluble tungsten to hard-metal, electronics, and phosphor manufacturing industries, with ammonium paratungstate (APT) being the most widely traded form. China dominates global tungstate supply and is the leading US import source under this heading, which the US schedule subdivides into ammonium (2841800010), calcium (2841800020), and other tungstate forms (2841800040, 2841800050). Shipments from China are subject to Section 301 tariffs, a significant cost consideration for downstream hard-metal and tooling manufacturers.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
27 shipments/mo
Classification follows the cation: ammonium tungstates (including APT) use 2841800010, calcium tungstate uses 2841800020, and all other tungstates not of ammonium fall under 2841800040 or the residual line 2841800050. The supplier's chemical name and formula on the certificate of analysis are the primary classification evidence; trade names alone are insufficient.
China controls a large share of global tungsten mining and processing, making US hard-metal and electronics manufacturers heavily dependent on Chinese-origin APT and other tungstates. Combined with Section 301 tariff exposure, this concentration has prompted some buyers to qualify alternative sources in Taiwan and Germany, though at higher cost and lower volume availability.
HSChapter 28
Subheading 1 of 7 in heading 2841
Subheading 284180 · $47.2M of $55.4M
Supplier Network
Get discovered by U.S. importers searching for HS 284180 — Tungstates (Wolframates). Be the first supplier listed.
ImportsExports
Imports
$47.2MYoY · Pro
Exports
$2.9MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2841800050 | Tungstates (Wolframates) (Tungsten Cnt), NESOI | $26.5M | 3.43% | 62.25% | $910K |
| 2841800010 | Tungstates (Wolframate) of Ammonium (Tungsten Cnt) | $13.9M | 19.99% | 152.34% | $2.8M |
| 2841800020 | Tungstates (Wolframates) of Calcium (Tungsten Cnt) | $6.8M | 0.00% | 0.00% | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2841800010 | Tungstates (Wolframate) of Ammonium (Tungsten Cnt) | $2.9M |
| 2841800040 | Tungstate (Wolframate), Except of Ammonium | $5K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · July 2026
origin
Vietnam and China together supply 67% of it.
customs district
destination
entry
rate provision · imports
35.6% enters free of duty; the effective duty rate is 7.82%.