Harmonized System
U.S. imports of Silicon (Less Than 99.99% Purity) — Metallurgical & Intermediate Grades (HS 280469) totaled $28.2M in September 2026, imported from 17 countries.
Importers of Silicon (Less Than 99.99% Purity) — Metallurgical & Intermediate Grades paid $5.0M in duties in September 2026, an average duty rate of 17.28% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Silicon (Less Than 99.99% Purity) — Metallurgical & Intermediate Grades imports of $28.2M in September 2026 ran 30% below the year-to-date monthly average of $40.0M.
Last updated: September 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.
291 import shipments a month
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.
Trade Directory
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Subheading 2 of 11 in heading 2804
Subheading 280469 · $28.2M of $104.9M
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 |
|---|---|---|---|---|---|
| 2804691000 | Silicon Between 99.99 Percent and 99 Percent Pure | $36.4M | 12.09% | 52.16% | $4.4M |
| 2804695000 | Silicon Less Than 99 Percent Pure | $4.8M | 10.01% | 65.31% | $484K |
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 | $999K |
| 2804695000 | Silicon Less Than 99 Percent Pure | $227K |
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.
ImportsExports
Imports
$28.2MYoY · free account
Exports
—YoY · free account
12-mo low · imports
Low · free accountOver the twelve months to September 2026, the U.S. imported $467.9M of Silicon (Less Than 99.99% Purity) — Metallurgical & Intermediate Grades.
Through September 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.
Imports · September 2026
origin
Brazil and Canada together supply 93% of it. Brazil pays 23.8% duty; Canada 0.0%.
customs district
destination
entry
rate provision · imports
25.1% enters free of duty; duty collected equals 17.28% of imports for consumption.