On June 1, President Trump signed Proclamation 11032 — the fifth major amendment to the Section 232 metals tariff regime in two years. If you import agricultural equipment, HVAC systems, industrial machinery, or anything containing steel, aluminum, or copper, your landed cost just changed. Some of you are saving 10 percentage points. Others are paying Section 232 duties for the first time. Here's exactly what happened and what to do about it.
The notification landed in brokers' inboxes on a Sunday afternoon. Proclamation 11032, "Further Adjusting the Tariff Regimes for Imports of Aluminum, Steel, and Copper Into the United States," dropped on June 1, 2026, with an effective date of June 8 — giving importers exactly one week to figure out whether they'd won the tariff lottery or just gotten pulled into the Section 232 net for the first time.
CBP followed on June 5 with implementation guidance in CSMS #68855869, three days before the rates went live. If you import tractors, heat pumps, lithographic plates, or steel storage racks, your compliance team had a very busy week.
This isn't a simple rate cut. Proclamation 11032 does two opposite things simultaneously: it reduces Section 232 rates on a large block of machinery and equipment from 25% to 15%, while expanding product coverage to capture items that were previously outside the tariff regime entirely. Understanding which side of that line your products fall on is worth real money.
What Is Proclamation 11032?
Section 232 of the Trade Expansion Act of 1962 authorizes the President to impose tariffs on imports that threaten national security. Since 2018, these tariffs have primarily targeted steel and aluminum — and since April 2026 under Proclamation 11021, copper and derivative products as well.
Proclamation 11032 amends that framework. It was issued June 1, 2026, takes effect June 8, 2026, and most of its temporary modifications sunset on December 31, 2027. After that date, products revert to standard Proclamation 11021 rates unless extended.
The key legal lineage: Proclamations 9704 and 9705 (original 2018 steel/aluminum tariffs) → Proclamation 10962 (copper expansion) → Proclamation 11021 (April 2026 comprehensive overhaul with tiered 50%/25%/15% structure) → Proclamation 11032 (June 2026 targeted adjustments).
The Rate Reductions: Who Wins
The headline change is a reduction from 25% to 15% for specific product categories added to Annex III of the tariff schedule. Three sectors benefit:
Agricultural Equipment
Tariffs on qualifying agricultural machinery and implements drop from 25% to 15% through December 31, 2027. This includes tractors, plows, harvesters, and other farm equipment containing steel or aluminum components that previously attracted the full 25% Section 232 duty as derivative products.
Residential HVAC Systems and Components
Heat pumps, furnaces, air conditioning units, and their components now qualify for the reduced 15% rate. With the construction industry already facing margin pressure from elevated materials costs, this 10-percentage-point reduction translates directly to lower installed costs for builders and contractors.
Certain Industrial Machinery
A broader category of industrial equipment and machinery gets temporary relief through Annex I-C, which establishes modified treatment for mobile industrial equipment. The specifics vary by HTS subheading, but the pattern is consistent: equipment that uses steel, aluminum, or copper as an input (rather than as the primary product) gets preferential treatment.
| Category | Previous Rate | New Rate | Duration |
|---|---|---|---|
| Agricultural equipment (Annex III) | 25% | 15% | Through Dec 31, 2027 |
| Residential HVAC systems | 25% | 15% | Through Dec 31, 2027 |
| Mobile industrial equipment (Annex I-C) | 25% | 15% | Through Dec 31, 2027 |
| US-origin metal content (≥85%) | 15% | 10% | Through Dec 31, 2027 |
The US-Content Threshold: A Quiet but Major Change
Buried in the proclamation is a significant shift in how "entirely made with US metals" is defined. The threshold has been relaxed from 95% to 85% US-origin content by weight.
Under the prior framework, derivative articles made "entirely" with US-smelted, -cast, or -poured metals qualified for the lowest 10% rate — but "entirely" meant 95% or more. That was a nearly impossible bar for many manufacturers who source small amounts of specialty alloys or feedstock internationally.
At 85%, the math changes dramatically. A manufacturer building agricultural equipment in Iowa using domestically poured steel can now incorporate up to 15% foreign-origin metal content and still qualify for the 10% rate instead of 25%. For a $500,000 combine harvester, that's the difference between $50,000 and $125,000 in Section 232 duties on the metal content.
The requirement: Steel must be US "melted and poured." Aluminum must be US "smelted and cast." Copper must be US "smelted and refined." Documentation proving origin and percentage must be maintained and available for CBP audit.
New Products Pulled Into the Section 232 Net
While one hand gives relief, the other expands coverage. Proclamation 11032 adds the following as derivative products subject to 25% Section 232 duties for the first time:
- Aluminum lithographic plates — used extensively in commercial printing and packaging
- Steel racks — warehouse storage racks, display racks, and industrial shelving
If your entries include these HTS subheadings and you weren't paying Section 232 duties before June 8, you are now. CBP's CSMS #68855869 identifies the specific Chapter 1–97 classifications affected.
This expansion targets what Commerce views as circumvention — downstream products that contain enough aluminum or steel to warrant national-security treatment but had previously slipped through definitional gaps.
The Low-Metal-Content Exemption
On the flip side, Proclamation 11032 provides that products made of 15% or less steel, aluminum, or copper by weight are no longer subject to Section 232 metals tariffs. This is a meaningful carveout for products where metal is a minor component — think electronics housings, composite panels, or mixed-material consumer goods where metal content is incidental rather than structural.
Country-Specific Preferential Rates
The proclamation continues differentiated treatment by country of origin, with certain trade partners effectively capped at 15% total Section 232 duty:
| Country/Region | Treatment |
|---|---|
| European Union | Capped at 15% for qualifying products |
| United Kingdom | 25% (Annex I-A) / 15% (Annex I-B) for UK-origin metal content |
| Japan | Preferential rates pending trade discussions |
| South Korea | Preferential rates for qualifying products |
| Argentina, Ecuador, El Salvador, Guatemala | 15% cap |
| Liechtenstein, Switzerland, Taiwan | 15% cap |
| Russia | 200% on all aluminum articles (unchanged) |
These preferential rates apply only when the importer can demonstrate that the metal content originated in the listed country. Blended or transshipped materials don't qualify — and CBP has signaled increased scrutiny on country-of-origin claims for metals since the April 2026 overhaul.
Why This Matters for Your Bottom Line
The financial impact of Proclamation 11032 depends entirely on where your products sit in the tariff schedule. Consider three scenarios:
Scenario 1: Agricultural equipment importer. You've been paying 25% Section 232 on derivative steel/aluminum content since April 2026. Effective June 8, your rate drops to 15%. On $2 million in annual agricultural equipment imports, that's $200,000 in annual savings — but only through December 2027.
Scenario 2: Printing company importing lithographic plates. You've never paid Section 232 duties on plates classified as aluminum articles. Starting June 8, you're paying 25% on the full customs value. On $500,000 in annual plate imports, that's $125,000 in new annual duties you weren't budgeting for.
Scenario 3: US manufacturer with 90% domestic steel content. Under the old 95% threshold, you didn't qualify for the 10% rate and were paying 15% or 25%. Under the new 85% threshold, you now qualify for 10%. On $3 million in qualifying articles, you save $150,000–$450,000 annually.
What to Do Right Now: Your Action Checklist
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Audit your HTS classifications against CSMS #68855869 — CBP's June 5 guidance identifies every affected subheading. Cross-reference your entry summaries from the past 90 days to determine if any lines moved into or out of Section 232 coverage.
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Check Annex III eligibility for agricultural, HVAC, and industrial equipment — If you import anything in these categories, verify whether your specific HTS subheadings were added to Annex III. The 15% rate isn't automatic — you must ensure entries are filed with the correct tariff treatment.
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Recalculate US-content percentages — If you import derivative articles with significant US-origin metal content, the relaxed 85% threshold may now qualify you for the 10% rate. Gather mill certificates and smelter documentation to support the claim.
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Review country-of-origin documentation — Preferential rates for EU, UK, Japan, Korea, and others require proof of metal origin. Ensure your suppliers can provide certificates of origin that trace metal content to the qualifying country.
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Calendar December 31, 2027 — Every temporary reduction sunsets on this date. Build the rate reversion into your 2028 budget planning now, not in Q4 2027 when it's too late to renegotiate supplier contracts.
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File Post Summary Corrections (PSCs) if applicable — If you entered goods between June 8 and whenever you read this at the wrong rate, file corrections immediately. Overpayments can be recovered; underpayments accrue interest and potential penalties.
What's Coming Next
Proclamation 11032 is explicitly temporary. The December 31, 2027 sunset means one of three things will happen:
- Extension: The administration issues another proclamation continuing the reduced rates (likely if domestic production hasn't caught up)
- Expiration: Rates revert to the full 25% under Proclamation 11021 (the default if nothing happens)
- Further modification: The tariff regime gets restructured again based on trade negotiation outcomes with the EU, UK, and others
Watch for Commerce Department reviews of the derivative-product list — the addition of lithographic plates and steel racks signals willingness to continue expanding coverage. If your products contain meaningful metal content and aren't currently classified as derivatives, don't assume they'll stay exempt.
The preferential rates for partner countries are also explicitly tied to "ongoing trade discussions." If those discussions stall or collapse, preferential treatment could be withdrawn by subsequent proclamation with minimal notice.
The Classification Audit You Can't Skip
Here's the uncomfortable truth: many importers don't actually know whether their products qualify for reduced treatment under the new annexes because their HTS classifications haven't been reviewed since before the April 2026 overhaul. The Section 232 regime now has five tiers (200%, 50%, 25%, 15%, 10%), multiple annexes, country-specific carveouts, and a metal-content threshold that just changed. Getting your classification wrong in either direction costs real money — overpay and you're donating margin to the Treasury; underpay and you're building a penalty liability that compounds with every entry.
The time to audit is now, while the June 8 effective date is recent enough that PSCs are straightforward and before the entry volume accumulates. TariffLens can help you cross-reference your HTS codes against the current Section 232 framework and flag entries that may qualify for reduced rates or need reclassification under the expanded derivative product list.
This article is for informational purposes only and does not constitute legal, tax, or customs advice. Consult a licensed customs broker or trade attorney for guidance specific to your situation.