US Commerce final antidumping duty orders on silicon metal from Angola and Laos

Mechanism

Following initiation of parallel antidumping (LTFV) investigations on 2025-05-21 into silicon metal from Angola, Australia, Laos, and Norway (petitioned by Ferroglobe USA, Inc.), Commerce published affirmative final LTFV determinations for Angola and Laos on 2026-02-23. On 2026-04-06 the USITC notified Commerce of its final affirmative material-injury determination for both countries, and on 2026-04-16 Commerce issued the formal antidumping duty orders (case numbers A-762-001 Angola, A-553-001 Laos; published 91 FR 20410).

For Angola, the named respondents PC Silicon Co. Limited and Wanhongda International Limited, along with the all-others rate, all received a 68.45% ad valorem weighted-average dumping margin — based entirely on adverse facts available (AFA) rather than a calculated dumping benefit. For Laos, the sole mandatory respondent Lao Silicon Co., Ltd. and the all-others rate both received a 94.44% margin, likewise AFA-driven. CBP was instructed to resume suspension of liquidation and cash-deposit collection at these order-level rates from the date of the ITC's final-determination publication; entries between 2026-01-28 (when provisional measures expired) and that publication were liquidated without antidumping duties.

This antidumping track runs alongside — and Commerce explicitly aligned its schedule with — the companion countervailing-duty case covering Laos, Australia, Norway, and Thailand (see responds_to), where Laos already carries a 240% preliminary CVD cash-deposit rate, also AFA-driven. The Australia and Norway LTFV investigations remained on a later track: preliminary affirmative determinations applicable 2026-02-09, with final LTFV determinations for both countries published 2026-06-30 (case docket references 2026-13118/2026-13121); as of this filing no companion antidumping duty order document for Australia/Norway has been located.

Downstream implications

• Angola- and Laos-origin silicon metal now faces combined AD (68.45% /

94.44%) and, for Laos, CVD (240% preliminary) exposure — effectively prohibitive for US-bound trade from either origin, reinforcing the shift toward domestic (Ferroglobe, Mississippi Silicon) and Brazilian supply that the companion CVD filing already flagged.

• Because both AD margins are AFA-driven rather than calculated, they

reflect respondent non-cooperation with Commerce's investigation rather than a measured dumping benefit — a pattern now repeated across both the AD and CVD tracks of this case for the Southeast Asian/African-origin respondents.

• Watch for a parallel antidumping duty order covering Australia and Norway

once their now-final (2026-06-30) LTFV determinations clear the ITC injury-finding and order-issuance steps — that would complete the four-country enforcement architecture GTA's state-act 91772 anticipates.

Open questions

• Did the USITC reach affirmative injury findings for Australia and Norway,

and has Commerce since issued the companion AD orders for those two origins?

• Did the final CVD determinations (Laos, Australia, Norway, Thailand)

confirm or revise the preliminary 240% Laos rate flagged in the companion CVD filing?

• What share of pre-2026 US silicon metal imports originated from

Angola/Laos, and how much of that volume has already redirected to Brazil or China ahead of the order taking effect?