US Continues Antidumping and Countervailing Duty Orders on Silicon Metal From Bosnia and Herzegovina, Iceland, Malaysia and Kazakhstan

On September 15, 2026, the U.S. Department of Commerce’s Enforcement and Compliance unit published a notice, applicable September 3, 2026, continuing the antidumping (AD) and countervailing duty (CVD) orders on silicon metal from Bosnia and Herzegovina, Iceland, Malaysia and Kazakhstan (91 FR 58413, Doc 2026-18790; cases A-893-001, A-400-001, A-557-820 and C-834-811). The orders had been due to expire; the first five-year “sunset” reviews kept them in place. For a buyer of aluminium components, the relevant fact is the input: silicon metal is a primary feedstock for aluminium-silicon casting and wrought alloys, so continued trade relief means landed cost and origin documentation stay in scope for the parts machined from those alloys.

This is a continuation of existing orders, not a new action. Below, what the notice establishes versus what remains an estimate, and what a sourcing team should check before quoting next quarter’s parts.

What the Continuation Notice Establishes

The confirmed, dated facts come straight off the notice and the underlying determinations:

• Commerce published the original AD orders on silicon metal from Bosnia and Herzegovina and Iceland on April 19, 2021 (86 FR 20364), the AD order on Malaysia on August 19, 2021 (86 FR 46677), and the CVD order on Kazakhstan on April 19, 2021 (86 FR 20365).
• The first five-year (sunset) reviews were instituted March 2, 2026 by both the ITC (91 FR 10148) and Commerce (91 FR 10053).
• Commerce determined that revocation would likely lead to continuation or recurrence of dumping and countervailable subsidies, and notified the ITC of the magnitudes likely to prevail.
• The ITC determined, in a notice published September 3, 2026 (91 FR 56670) and issued August 31, 2026 (USITC Publication 5785, Inv. Nos. 701-TA-652 and 1524-1526 (Review)), that revocation would likely lead to continuation or recurrence of material injury to a U.S. industry. Chairman Doyle and Commissioners Kearns, Pappas, Thanhauser and Foley voted in the affirmative.
• As a result, Commerce ordered the continuation of the orders. U.S. Customs and Border Protection will continue to collect AD and CVD cash deposits at the rates in effect at the time of entry for all imports of subject merchandise.
• The next five-year reviews are due to be initiated no later than 30 days before the fifth anniversary of the last ITC determination (19 CFR 351.218(c)(2)); that is the next scheduled opportunity for the orders to change.

The Rates Likely to Prevail, and Why They Matter

The notice incorporates the magnitudes Commerce found likely to prevail if the orders were revoked – estimates for a hypothetical revocation, not new deposits assessed today:

• Antidumping, weighted-average dumping margins (91 FR 40983, July 6, 2026): Bosnia and Herzegovina up to 21.41%; Iceland 47.54%; Malaysia 12.27%.
• Countervailing duty, net countervailable subsidy rate (91 FR 38670, June 26, 2026): Kazakhstan 160.00% ad valorem, for the named producer/exporter Tau-Ken Temir LLP and JSC NMC Tau-Ken Samruk.

Two cautions follow. First, these figures describe what would likely prevail on revocation; they are the basis for keeping the orders alive, not a new rate to apply to a specific shipment. Second, the operative deposit for any entry is the rate in effect at entry for the specific producer and exporter, which is what CBP continues to collect. A cost model should use the actual entry rate on the commercial invoice, not the sunset magnitude.

The Scope: Why Alloys and Machined Parts Are Exposed

The scope of the orders covers all forms and sizes of silicon metal, including silicon metal powder. Silicon metal within scope contains at least 85.00 percent but less than 99.99 percent silicon, and less than 4.00 percent iron, by actual weight. Semiconductor-grade silicon – merchandise containing at least 99.99 percent silicon, classifiable under HTSUS 2804.61.0000 – is excluded. Within-scope silicon metal is currently classifiable under HTSUS 2804.69.1000 and 2804.69.5000, though the written scope description, not the tariff numbers, is dispositive.

That scope looks narrow next to machined parts, and in a direct sense it is: silicon metal is an upstream metallurgical input, not a finished component. The connection to a CNC shop is through the alloy. Silicon is the principal alloying element in the aluminium-silicon casting alloys used for machined housings, brackets and pump bodies, and it appears in 4xxx-series wrought filler and brazing stock. When the trade status of the silicon input changes, the cost and availability of those alloys can shift, and the paper trail an importer needs gets longer – the same channel that showed up when the United States imposed duties on silicon metal from Australia and Norway, alongside other input-cost pressure such as the tightening aluminium supply through August 2026.

What a Buyer or Engineer Should Verify

Nothing here changes the mechanical properties of any alloy or the machinability of any part. What it supports is a short, reusable sourcing check:

• Trace the alloy back to its silicon input. For aluminium-silicon castings or wrought stock, confirm with the mill or foundry whether the silicon metal used falls in scope, and from which origin – the orders name Bosnia and Herzegovina, Iceland, Malaysia and Kazakhstan.
• Keep producing origin documented. Ask suppliers to state the country of origin of the silicon metal and the alloy, not just the country of final casting or machining.
• Price on the entry rate, not the sunset magnitude. Model landed cost using the cash-deposit rate in effect at entry for the actual producer and exporter; treat the 12.27%-47.54% and 160.00% figures as likelihood estimates, not quotes.
• Watch the review calendar. The next five-year reviews will be initiated no later than 30 days before the fifth anniversary of the last ITC determination, which is when scope or rates could change.
• Separate scope cleanly. If you import both in-scope silicon metal and non-subject material, keep classifications, invoices and entry documentation distinct.

Limited Conclusions

What is established and dated: on September 3, 2026, with the notice published September 15, 2026, Commerce continued the AD orders on silicon metal from Bosnia and Herzegovina, Iceland and Malaysia and the CVD order on silicon metal from Kazakhstan (A-893-001, A-400-001, A-557-820, C-834-811), following affirmative sunset determinations by Commerce and the ITC (USITC Pub 5785). The magnitudes likely to prevail on revocation run from 12.27% to 47.54% in the antidumping cases and 160.00% for Kazakhstan in the countervailing case, but these are likelihood estimates, not new deposit rates. CBP continues to collect cash deposits at the rates in effect at entry.

The durable takeaway: upstream trade relief on a metallurgical input reaches machined parts through the alloy they are made from and the origin documentation an importer must hold. This continuation implies no change to any part’s physical properties, tolerances or quoted price today, but the habits it rewards – knowing the origin of the silicon in your aluminium, pricing on the real entry rate, and tracking the review calendar – keep cost, quality and compliance decisions audit-ready. Buyers should also weigh it against other trade actions that touch the same supply chain, such as the proposed Section 232 derivative-article additions and the CVD review of brass rod from Korea.

References

• Commerce, Enforcement & Compliance. “Silicon Metal From Bosnia and Herzegovina, Iceland, Malaysia, and the Republic of Kazakhstan: Continuation of Antidumping Duty Orders and Countervailing Duty Order.” Federal Register Doc 2026-18790, 91 FR 58413, September 15, 2026 (applicable September 3, 2026). Retrieved September 15, 2026. federalregister.gov/documents/2026/09/15/2026-18790
• Official PDF, govinfo.gov (U.S. GPO): FR Doc 2026-18790, 91 FR 58413, September 15, 2026. FR-2026-09-15/pdf/2026-18790.pdf
• U.S. International Trade Commission. “Silicon Metal From Bosnia and Herzegovina, Iceland, Kazakhstan, and Malaysia; Determinations.” Federal Register Doc 2026-18030, 91 FR 56670, September 3, 2026 (issued August 31, 2026; USITC Publication 5785). Retrieved September 15, 2026. federalregister.gov/documents/2026/09/03/2026-18030
• Commerce, Enforcement & Compliance. “Silicon Metal From Bosnia and Herzegovina, Iceland, and Malaysia: Final Results of the Expedited First Sunset Reviews of the Antidumping Duty Orders.” 91 FR 40983, July 6, 2026. Dumping margins likely to prevail.
• Commerce, Enforcement & Compliance. “Silicon Metal From the Republic of Kazakhstan: Final Results of the Expedited First Sunset Review of the Countervailing Duty Order.” 91 FR 38670, June 26, 2026. Subsidy rate likely to prevail.

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