Section 232 update: Metals tariff treatment for downstream products

On June 1, 2026, the U.S. administration issued Presidential Proclamation 11032 (the proclamation), further adjusting Section 232 of the Trade Expansion Act of 1962 (Section 232) tariffs on aluminum, steel, and copper imports.

The proclamation preserves the tariff framework introduced in April 2026, but it refines its application to downstream products, particularly machinery and equipment.

What changed

Refinements to downstream product treatment

The proclamation reflects increased focus on downstream industries that rely on metal inputs, modifying the tariff treatment of select products and derivative products, including certain agricultural equipment, residential HVAC systems and components, mobile industrial equipment, aluminum lithographic plates, and steel racks.

Key updates include:

• Expanded reduced tariff eligibility (15% rate). Agricultural equipment and certain residential HVAC systems and components are now eligible for the temporary 15% tariff rate, expanding the scope of products benefiting from reduced treatment originally introduced under Proclamation 11021.
• Targeted relief for certain industrial equipment. Temporary tariff relief applies to select mobile industrial equipment and machinery, such as bulldozers and forklifts, when imported from countries eligible under negotiated trade arrangements.
• New derivative products brought into scope. Aluminum lithographic plates and steel racks have been added as covered derivative articles and are now subject to applicable Section 232 tariffs.
• Lower threshold for U.S. metal content qualification. The threshold for determining whether a product is considered made of U.S. steel, aluminum, or copper has been reduced from 95% to 85% content by weight. This change may expand eligibility for preferential tariff treatment tied to U.S.-origin metal content.
• Country-specific and USMCA treatment maintained. Special tariff provisions remain in place for certain countries. For qualifying USMCA goods, the 25% tariff may apply only to non-U.S. content, subject to a minimum effective rate of 15%.

Measures are temporary through 2027

Many of these updates — including revised treatment for certain aluminum and steel articles — are effective for goods entered for consumption, or withdrawn from warehouse for consumption, on or after 12:01 a.m. ET on June 8, 2026, and remain in effect through Dec. 31, 2027, unless further modified. Final tariff rates may vary based on product classification, country of origin, base duty rates, USMCA status, and U.S. metal content.

Full-value tariff methodology remains in place

Tariffs continue to apply to the full customs value of the imported product, not just the metal content — a key driver of increased duty exposure for complex assemblies and equipment.

Key exclusions and preferences unchanged

• Products with low metal content (about 15% or less) remain excluded.
• Preferential treatment for qualifying U.S.-origin or U.K.-origin metal content continues.
• Section 232 tariffs don’t stack across metals.

Why it matters

Shift from expansion to ongoing calibration

For manufacturers and importers, the latest changes reinforce a key theme: Section 232 has moved from structural expansion to ongoing calibration. While the April 2026 proclamation established a new baseline, the June update signals a transition to continuous policy refinement, particularly for downstream industries.

Increased uncertainty for downstream manufacturers

Companies importing machinery, equipment, or other metal-intensive products may face:

• Ongoing classification risk, as products are reevaluated or reprioritized.
• Cost volatility, particularly where temporary tariff rates apply.

Continuation of administrative flexibility

The administration is expected to continue adjusting product scope on a rolling basis in response to industry feedback, evolving economic conditions, and national security considerations.

Longer-term planning considerations

Many provisions — including reduced rates for certain equipment — remain temporary through Dec. 31, 2027, introducing potential future downside risk if rates increase or revert.

What companies should do

• Reassess imported products with significant metal content, especially downstream equipment, and review impacted classifications, origin details, and U.S. content calculations.
• Validate country of origin and production documentation.
• Evaluate cost exposure under the full-value tariff treatment.
• Monitor any ongoing changes in product classification and coverage.
• Incorporate scenario planning tied to temporary tariff provisions.

What to watch for next

As Section 232 continues to evolve, be on the lookout for:

• Additional updates to covered product lists and classifications.
• Further adjustments targeting downstream industries.
• Potential expansion of sector-specific Section 232 actions (e.g., pharmaceuticals).

Bottom line

Proclamation 11032 doesn’t change the foundation of the Section 232 tariff regime but signals a shift toward ongoing, targeted refinement — particularly for downstream products.

For companies, the impact is less about new headline tariff rates and more about how products are classified, how supply chains are structured, and how temporary provisions may evolve through 2027.

Manufacturers and importers should expect continued adjustments and take a proactive approach to monitoring changes, validating product data, and modeling cost exposure in an increasingly dynamic trade environment.