reference·13 min read

Section 232 HTS Codes: National-Security Tariffs Across Six Sectors

Full list of Section 232 Chapter 99 code families by sector, updated for the June 2026 metals changes, pharmaceutical 9903.04.* headings, MHDV guidance, Taiwan auto/wood/aircraft modifications, and USITC Revision 9.

By Paige W.··Updated June 8, 2026

Quick Answer

Section 232 national-security tariffs span multiple Chapter 99 families organized by sector. As of April 6, 2026, the steel, aluminum, and copper regime was restructured into a new 9903.82.* family. A May 2026 technical correction added 9903.82.01 as a zero-additional-duty heading. A June 2026 proclamation and CBP guidance expanded the current metals map to 9903.82.01-.26, with 9903.82.20-.26 effective June 8, 2026 and before January 1, 2028. A pharmaceutical sector (9903.04.*) was added by proclamation on April 2, 2026, with tariffs effective July 31-September 29, 2026 and Commerce onshoring applications requested by June 12. CBP also issued May 2026 guidance for USMCA-qualifying medium/heavy-duty vehicles using 9903.74.03 for non-U.S. content and 9903.74.06 for U.S. content after Commerce approval.

May 27-28 Taiwan guidance adds another country-specific Section 232 layer for certain Taiwan-origin auto parts, wood products, and civil-aircraft components. USITC 2026 HTS Revision 9 is now the latest observed USITC release in this review.

Informational only — not legal advice.

Section 232 started as steel and aluminum tariffs. It is now a six-sector national-security duty program spanning hundreds of Chapter 99 codes — and the code families themselves changed in April 2026.

The steel, aluminum, and copper sectors were restructured into a new 9903.82.* family effective April 6, 2026, replacing the old 9903.80.*, 9903.81.*, 9903.85.*, and 9903.78.* families for goods entered on or after that date. Pharmaceuticals were added as a new sector (9903.04.*) with tariffs effective July 31–September 29, 2026.

If your entry shows a 9903.04, 9903.74, 9903.76, 9903.79, 9903.82, or 9903.94 code, it is almost certainly a Section 232 line. If your entry predates April 6, 2026 and shows a 9903.78, 9903.80, 9903.81, or 9903.85 code, those were the operative metals families before the restructuring.

Background on Section 232

Section 232 comes from the Trade Expansion Act of 1962. It allows the president to adjust imports after a Commerce Department investigation finds that a class of imports threatens to impair U.S. national security.

Steel and aluminum were first (2018). Since then, successive Commerce Department investigations and presidential proclamations have added autos, auto parts, heavy vehicles, copper, timber, and semiconductors — and in April 2026, pharmaceuticals. Each sector has its own code sub-family, its own proclamation chain, and in some cases its own exception or exclusion mechanics.

Current status

As of June 8, 2026, the active Section 232 sectors are:

SectorCode familyNotes
Steel, aluminum, copper (restructured)9903.82.*Effective April 6, 2026; 9903.82.01 added by technical correction; June 8 guidance adds/implements 9903.82.20-.26; Rev 9 is latest observed USITC release
Pharmaceuticals and APIs9903.04.*Proclaimed April 2; effective July 31 / Sept 29, 2026; Commerce onshoring applications requested by June 12
Autos and auto parts9903.94.*Taiwan auto-part headings 9903.94.66-.69 added by May 28 FR public-inspection notice / May 27 CBP guidance
Medium/heavy-duty vehicles, buses9903.74.*May 2026 CBP guidance explains approved USMCA MHDV content reporting under 9903.74.03 and 9903.74.06
Timber / lumber9903.76.*Taiwan wood heading 9903.76.24 added by May 28 FR public-inspection notice / May 27 CBP guidance
Semiconductors + derivatives9903.79.*Unchanged
Taiwan civil-aircraft components9903.96.03Removes specified derivative Section 232 steel/aluminum/copper duties for qualifying Taiwan-origin civil-aircraft components

For entries before April 6, 2026, the operative metals families were: steel articles (9903.80.*–9903.81.*), aluminum (9903.85.*), and copper (9903.78.*). Two aluminum codes (9903.85.67, 9903.85.68) continue to apply for Russian-origin aluminum after April 6.

How to use this page with our HTS tool

  1. Click the exact 9903.* code from the entry.
  2. In the HTS tool, confirm the code family and sector.
  3. Compare it with the base Chapter 1-97 classification and any other Chapter 99 overlays on the same line.
  4. If the entry shows a supposed Section 232 exception line on an IEEPA or Section 122 entry, use the tool to confirm whether it is an actual 232 code or a reciprocal-program carveout that only references 232.

Metals code families changed April 6, 2026

Entries on or after April 6, 2026 use 9903.82.* for steel, aluminum, and copper. The old families — 9903.80.*, 9903.81.*, 9903.85.*, and 9903.78.* — are legacy and apply only to entries before that date (except 9903.85.67 and 9903.85.68, which continue for Russian-origin aluminum).

Section 232 is a family of families

Some programs outside Section 232 (like IEEPA and Section 122) reference Section 232 goods as carveouts. A carveout heading that mentions 232 is not itself a 232 code. Use the HTS tool to confirm the code family before treating it as a 232 duty.

Full Section 232 code list

Restructured metals (steel, aluminum, copper) — effective April 6, 2026

Proclaimed April 2, 2026 (91 FR 18201, doc. 2026-06960); effective April 6, 2026. Replaces the prior steel, aluminum, and copper code families for entries on or after that date. Pre-April-6 entries used the older 9903.78.*/9903.80.*/9903.81.*/9903.85.* families with their then-current rates. Implementation guidance: CBP CSMS #68253075. USITC 2026 HTS Revision 7 and CBP CSMS #68554727 added 9903.82.01 for articles listed in Note 16(c) that do not contain aluminum, steel, or copper. Proclamation 11032, Federal Register doc. 2026-11314, and CBP CSMS #68855869 added June 8, 2026 guidance for 9903.82.20-.26, reduced-rate derivative treatment, Canada/Mexico USMCA derivative steel value splits, and an 85% by-weight U.S. metal test for "entirely" treatment.

CBP warns that imports under 9903.82.03, 9903.82.13, and 9903.82.21 are not eligible for the Section 122 exemption under 9903.03.06.

Pharmaceuticals and APIs — effective July 31 / September 29, 2026

Proclaimed April 2, 2026 (91 FR, doc. 2026-06956). Covers patented pharmaceuticals and active pharmaceutical ingredients (APIs) in Chapters 29 and 30. Generic pharmaceuticals are excluded. Default rate: 100%. Tariffs are not yet being collected as of the June 8 review because the effective dates remain July 31 and September 29, 2026.

Medium- and heavy-duty vehicles, parts, buses

CBP CSMS #68559236 explains how to report approved USMCA-qualifying MHDVs when Commerce has approved applying the 25% Section 232 tariff only to the non-U.S. content value:

  • 9903.74.03: non-U.S. content of approved USMCA-qualifying MHDVs, 25% additional ad valorem.
  • 9903.74.06: U.S. content of the same approved MHDVs, 0% additional ad valorem.

CBP says the values must be reported on two lines with the same Chapter 1-97 HTS and country of origin, and SPI S. HSU 2610, created May 7, 2026, contained the related HTS updates.

Timber / lumber / wood derivatives

9903.76.24 is the Taiwan wood-products heading added by the May 28, 2026 Federal Register public-inspection notice and CBP CSMS #68762890. It applies a 15% rate for covered Taiwan wood products under U.S. note 37, effective for entries on or after May 1, 2026.

Autos and auto parts

Taiwan auto-part headings 9903.94.66-.69 were added by the May 28, 2026 Federal Register public-inspection notice and CBP CSMS #68762890. Covered Taiwan auto parts with a Column 1 duty rate at least 15% use 0% additional Section 232 duty treatment under the Taiwan headings; covered Taiwan auto parts with a Column 1 duty rate below 15% use a 15% combined Column 1 plus Section 232 treatment. The notice also preserves standard CBP refund procedures, including PSCs where implementation requires a duty refund.

Taiwan civil-aircraft components

9903.96.03 covers qualifying Taiwan-origin civil-aircraft components and removes the derivative Section 232 steel, aluminum, and copper duties otherwise imposed by 9903.82.02 and 9903.82.04-.19. Continue reporting SPI C where the Agreement on Trade in Civil Aircraft preference is claimed.

Legacy: steel articles and steel derivatives (entries before April 6, 2026)

These codes were operative for entries before April 6, 2026. For goods entered on or after April 6, 2026, use 9903.82.* instead.

Legacy: aluminum articles and aluminum derivatives (entries before April 6, 2026)

These codes were operative for entries before April 6, 2026. For goods entered on or after April 6, 2026, use 9903.82.* instead. Exception: 9903.85.67 and 9903.85.68 continue to apply for Russian-origin aluminum after April 6, 2026.

Legacy: copper (entries before April 6, 2026)

These codes were operative for entries before April 6, 2026. For goods entered on or after April 6, 2026, copper is included within the restructured 9903.82.* family.

Common confusions

  • Section 232 is not limited to steel and aluminum anymore.
  • The metals code families changed in April 2026. Entries on or after April 6, 2026 use 9903.82.*. Entries before that date used 9903.80.*, 9903.81.*, 9903.85.*, or 9903.78.*. Do not apply the new rate structure or code family to pre-April 6 entries.
  • The May 2026 Taiwan notice is a Section 232 / trade-security-agreement implementation item, not an IEEPA/CAPE refund item. If implementation requires a refund of Section 232 duties collected on or after May 1, CBP points to standard procedures such as Post Summary Corrections.
  • Pharma codes (9903.04.*) were proclaimed April 2, 2026, but tariffs are not yet being collected as of June 8, 2026. Effective dates remain July 31 and September 29, 2026.
  • Some programs outside Section 232 reference Section 232 goods as carveouts. That does not make those carveout headings themselves 232 codes.
  • Reporting obligations and duty outcomes are not always the same thing. Some 232-related classifications can carry special reporting obligations even where duty is zero.

Frequently Asked Questions

Is Section 232 just steel and aluminum?

No. As of June 2026, Section 232 covers six sector families: restructured metals (steel, aluminum, and copper in 9903.82.), pharmaceuticals and APIs (9903.04., effective July 31/September 29, 2026), autos and auto parts (9903.94.), medium- and heavy-duty vehicles (9903.74.), timber and lumber (9903.76.), and semiconductors (9903.79.). The steel-and-aluminum description is a significant understatement of the program's current scope.

What HTS codes are part of Section 232?

As of June 2026, Section 232 spans: 9903.82.01-.26 for the restructured metals sector, with 9903.82.20-.26 effective June 8, 2026; 9903.04.60-.69 for pharmaceuticals; 9903.94.* for autos and auto parts; 9903.74.* for medium/heavy-duty vehicles; 9903.76.* for timber/lumber; 9903.79.* for semiconductors; and 9903.96.03 for Taiwan civil-aircraft components. For entries before April 6, 2026, the operative metals families were 9903.80.-9903.81., 9903.85., and 9903.78..

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Sources & Verification

Last verified: 2026-06-08

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Informational only — not legal advice. RefundArrow is not a law firm, and this resource does not create an attorney‑client relationship with Himmelstein & Adkins, LLC. Tariff/refund outcomes depend on your facts, entry records, and evolving CBP/court guidance; consult qualified customs counsel for advice on your situation.

Section 232 HTS Codes: National-Security Tariffs Across Six Sectors | RefundArrow