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HSChapter 28
U.S. imports of silicon (less than 99.99% purity) — metallurgical & intermediate grades (HS 280469) totaled $49.2M in July 2026, traded with 16 countries.
Importers of Silicon (Less Than 99.99% Purity) — Metallurgical & Intermediate Grades paid $5.2M in duties in July 2026 — an effective duty rate of 14% on $37.5M in dutiable value, based on actual customs collections rather than the published tariff schedule. Silicon (Less Than 99.99% Purity) — Metallurgical & Intermediate Grades imports of $49.2M in July 2026 ran 14% above the year-to-date monthly average of $43.3M.
Last updated: July 2026 dataMetallurgical-grade and intermediate-purity silicon — silicon containing less than 99.99% silicon by weight — is the workhorse input for aluminum alloys, silicones, and chemical intermediates, and is classified under heading 280469. The US schedule further subdivides this heading: 2804691000 covers silicon between 99% and 99.99% pure, while 2804695000 covers silicon below 99% purity, a distinction that matters for both duty treatment and end-use qualification. Brazil and Canada are the leading US suppliers, with Norway and Australia also significant — a supplier mix shaped by access to low-cost hydroelectric power, which is the dominant production cost driver for electric-arc-furnace silicon smelting. Imports from certain origins may be subject to antidumping or countervailing duty orders, so a thorough admissibility review is advisable before sourcing.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
455 shipments/mo
Line 2804691000 covers silicon that is between 99% and 99.99% pure by weight — sometimes called 'solar-precursor' or 'upgraded metallurgical' grade — while 2804695000 covers silicon below 99% purity, the standard metallurgical grade used in aluminum alloys and silicone chemistry. The purity boundary directly affects duty treatment and may affect eligibility under certain trade-remedy orders.
Antidumping and countervailing duty orders have historically applied to silicon metal from several countries. Importers should query the CBP ADD/CVD portal and USITC records for the current status of any orders covering their specific origin country and purity grade before committing to a purchase.
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Subheading 1 of 11 in heading 2804
Subheading 280469 · $49.2M of $79.4M
ImportsExports
Imports
$49.2MYoY · Pro
Exports
$1.1MYoY · 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 |
|---|---|---|---|---|---|
| 2804691000 | Silicon Between 99.99 Percent and 99 Percent Pure | $41.0M | 11.15% | 76.28% | $4.6M |
| 2804695000 | Silicon Less Than 99 Percent Pure | $8.2M | 7.70% | 76.53% | $629K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2804691000 | Silicon Between 99.99 Percent and 99 Percent Pure | $951K |
| 2804695000 | Silicon Less Than 99 Percent Pure | $192K |
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
Brazil and Canada together supply 81% of it.
customs district
destination
entry
rate provision · imports
9.2% enters free of duty; the effective duty rate is 10.58%.