HS Code for Aluminum Extrusion: 7604.21 vs 7604.29 by Profile Shape

Aluminum extrusion is a high-volume industrial import category. Architectural framing, automotive structural, heat sinks, HVAC channels, solar mounting, EV battery enclosure trays. The 2026 duty stack on Chinese extrusion is among the highest in chapter 76 due to the combination of Section 232 (50 percent), Section 301 (25 percent), Section 122 (10 percent), and active ADCVD orders.

This guide covers the HTS 7604 split between hollow and non-hollow profiles, the Section 232 derivative implications, the ADCVD landscape, and worked tariff math for typical extrusion lanes.

Heading 7604 structure

HTS 7604 covers aluminum bars, rods, and profiles. Subheadings:

• 7604.10: Of aluminum, not alloyed (commercial pure aluminum). Bars and rods.
• 7604.21: Of aluminum alloys (most extrusion is alloyed: 6061, 6063, 7075, etc), hollow profiles.
• 7604.29: Of aluminum alloys, other (non-hollow).

Within 7604.29, statistical annotations split by shape:

• 7604.29.10: Bars (solid, round or rectangular).
• 7604.29.30: Rods.
• 7604.29.50: Profiles (T, L, U, I, channel, custom shapes).

Worked example: Chinese 6063-T5 architectural extrusion

100,000 USD of HTS 7604.21 hollow profile for window frames, Chinese smelt origin.

Effective rate 135 percent. Chinese aluminum extrusion is essentially non-importable in 2026.

Worked example: Vietnamese extrusion (potential anti-circumvention)

100,000 USD of HTS 7604.21 from a Vietnamese extruder. Substrate billet from Vietnamese smelter.

Effective rate 51.8 percent. Vietnamese smelt origin avoids the China stack entirely; only Section 232 fires at the global rate.

CRITICAL: If the Vietnamese extruder used Chinese-smelt billet, the GACAA anti-circumvention framework applies and the import is treated as Chinese-origin for Section 232. Producer documentation of the billet smelt source is essential.

Worked example: Mexican USMCA-qualifying extrusion

100,000 USD of HTS 7604.21 from a Mexican extruder. Mexican-smelt billet from Norsk Hydro Mexico or domestic remelt operation.

Effective rate 0.35 percent. USMCA-qualifying Mexican-smelt extrusion is the cheapest landed cost option globally. Mexico's primary aluminum production capacity is limited so supply is constrained.

Worked example: Canadian extrusion (TRQ in quota)

100,000 USD of HTS 7604.21 from a Quebec extruder. Canadian-smelt aluminum from Rio Tinto or Alcoa Becancour.

Effective rate 0.35 percent. Canadian-smelt aluminum within the TRQ allocation is the largest single source of low-duty extrusion for US buyers in 2026. Hydropower-driven Quebec smelters have the largest production capacity in North America.

Worked example: Turkish extrusion (CBAM concern for EU resale)

For US-direct: Turkish-smelt aluminum extrusion 100,000 USD into US:

Effective rate 51.8 percent. Turkish extrusion is competitive with Vietnamese for US-bound; both at ~52 percent.

For Turkish extrusion into EU (Germany): no Section 232 layer, but CBAM applies (covered in separate page).

Section 232 derivative on aluminum products

Aluminum extrusion itself is in chapter 76 and pays Section 232 on the full value. The derivative annex extends 232 treatment to aluminum-content portions of articles in chapters 84, 85, 87, 94 (e.g., aluminum bicycle frames, aluminum window components classified elsewhere, aluminum heat exchangers in HVAC equipment).

For 7604 chapter 76 imports, the producer affidavit identifies smelt origin but not metal value split (the article is wholly aluminum).

Documentation that supports the classification and origin

• Material specification (alloy designation, temper, dimensions).
• Mill test report (MTR) with heat number, chemistry, mechanical properties.
• Smelt-and-cast certificate identifying:
  • Country of smelt (primary aluminum from alumina).
  • Country of cast (where billet was first cast).
  • For secondary aluminum, country of scrap remelt.
• Producer extrusion log (extrusion country, press date).
• For USMCA preference: USMCA certification of origin per shipment or blanket.

Run your aluminum extrusion entry now

The LandedFees calculator handles 7604 with country-specific stacking, the Section 232 50 percent layer plus smelt-and-cast origin verification, the ADCVD orders against Chinese extrusion, the anti-circumvention findings against Vietnam-processed Chinese-billet extrusion, and the USMCA / TRQ logic for Mexican and Canadian-smelt aluminum.

Calculate an aluminum extrusion entry

Section 122 status as of June 20 2026

The May 7 2026 Court of International Trade ruling in Oregon v. United States (consolidated with Burlap and Barrel v. United States) struck down the Section 122 proclamation. The Federal Circuit issued an administrative stay on May 12 2026, so CBP is still collecting the duty pending appeal. Importers paying now should preserve protest rights and refund claims in case the government loses on the merits. The underlying Section 122 authority sunsets July 24 2026 under the statutory 150-day ceiling, regardless of the appeal outcome, unless Congress extends or a fresh proclamation restarts the clock.

Citations

• USITC Harmonized Tariff Schedule heading 7604: https://hts.usitc.gov/?query=7604
• Section 232 aluminum proclamation June 2025: Federal Register
• Commerce ADCVD on Chinese aluminum extrusion: https://access.trade.gov
• GACAA anti-circumvention framework (2024 incorporation): Section 232 administrative guidance
• USMCA Annex 4-B chapter 76 rule of origin
• Mexico and Canada Section 232 TRQ allocations: CBP quota allocation reports