U.S. imports of Tungstates (Wolframates) (HS 284180) totaled $50.5M in August 2026, imported from 9 countries.
Importers of Tungstates (Wolframates) paid $4.3M in duties in August 2026, an average duty rate of 7.54% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Tungstates (Wolframates) imports of $50.5M in August 2026 ran 76% above the year-to-date monthly average of $28.7M.
Last updated: August 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.
30 import shipments a month
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.
Subheading 1 of 7 in heading 2841
Subheading 284180 · $50.5M of $89.3M
ImportsExports
Imports
$50.5MYoY · free account
Exports
$197KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $261.3M of Tungstates (Wolframates) and exported $11.1M.
Through August 2026. Source: U.S. Census Bureau.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2841800050 | Tungstates (Wolframates) (Tungsten Cnt), NESOI | $44.8M | 4.91% | 89.29% | $2.2M |
| 2841800010 | Tungstates (Wolframate) of Ammonium (Tungsten Cnt) | $12.5M | 16.97% | 97.28% | $2.1M |
| 2841800020 | Tungstates (Wolframates) of Calcium (Tungsten Cnt) | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2841800040 | Tungstate (Wolframate), Except of Ammonium | $197K |
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 · August 2026
origin
Taiwan and Vietnam together supply 69% of it. China pays 17.7% duty; South Korea 0.0%.
customs district
destination
entry
rate provision · imports
10.2% enters free of duty; duty collected equals 7.54% of imports for consumption.