Trump Expands Metal Tariffs in Sweeping Revision That Will Hit Consumer Prices and Industrial Supply Chains

Tariff Expansion Hits Hundreds of Products

President Trump issued a proclamation on April 6 that fundamentally restructures Section 232 metal tariffs in ways that will ripple through American manufacturing, construction, and consumer goods sectors. The changes represent one of the most aggressive expansions of protectionist trade policy in decades.

The core change: tariffs now apply to the full value of products containing steel, aluminum, or copper -- not just the metal content itself. A 50% tariff will hit goods made "entirely or almost entirely" of these metals, while a 25% tariff applies to "derivative articles substantially made of" them.

This is a massive shift. Previously, tariffs targeted the metal component of mixed-material goods. Now, if you import a product that's mostly aluminum -- say, window frames or certain automotive parts -- the entire value of that product faces a 50% tax at the border.

According to analysis from trade law firm Sandler, Travis & Rosenberg, the proclamation extends Section 232 tariffs to 13 new steel derivatives and four new aluminum derivatives. Hundreds of other derivative products saw tariffs lowered or removed entirely, but the net effect is a dramatic expansion of tariff exposure across industrial supply chains.

Carve-Outs for the United Kingdom, Penalties for Everyone Else

The proclamation creates a two-tier system that favors British imports while penalizing most other trading partners. Goods containing at least 95% aluminum smelted or cast in the United Kingdom, or 95% steel melted and poured there, face reduced tariffs: 25% on articles and 15% on derivatives.

Everyone else pays the full rate.

Products made abroad but containing at least 95% U.S.-origin metal will face a 10% tariff -- still a tax on American materials that left the country and came back as finished goods.

The proclamation carves out certain metal-intensive industrial equipment and electrical grid equipment for a 15% tariff through 2027, a temporary reprieve that suggests even the administration recognized the chaos that 50% tariffs would cause for critical infrastructure projects.

Goods containing 15% or less metal by weight will no longer face Section 232 tariffs, unless they fall under specific tariff classification codes reserved for base metals and metal products.

Public Input Eliminated, Authority Centralized

One of the most troubling changes: the Trump administration has eliminated the process for businesses to petition for exclusions or additions to the tariff list. Previously, companies could submit public requests to exclude specific products from tariffs or argue that certain goods should be covered.

That's gone. The proclamation states that the Department of Commerce and the Office of the U.S. Trade Representative "may make such additions" to the tariff scope -- but the public petition process has been shut down.

This consolidates enormous discretionary power in the hands of political appointees with no formal mechanism for affected businesses, workers, or industries to seek relief or provide input. It's a system ripe for favoritism and backroom dealing.

No Tariff Stacking -- But Still Brutal Math

U.S. Customs and Border Protection clarified that products containing multiple metals -- aluminum and steel, for example, or all three covered metals -- will only be subject to one tariff rate, not multiple stacked tariffs.

That's a small mercy in an otherwise punishing regime. A product that's 60% aluminum and 30% steel will face one 50% tariff, not two. But for manufacturers importing complex goods with mixed metal content, the math is still brutal.

Trade War Fallout Continues

The proclamation does not alter prior agreements with the European Union, Japan, or South Korea that reduced Section 232 tariffs on certain products covered by the World Trade Organization Agreement on Trade in Civil Aircraft. Those carve-outs remain in place -- for now.

But the broader trajectory is clear: the Trump administration is doubling down on protectionist trade policy that raises costs for American businesses and consumers while concentrating decision-making authority in the executive branch.

Retaliatory tariffs from affected trading partners are virtually guaranteed. American exporters in agriculture, manufacturing, and services will face higher barriers abroad. Consumers will pay more for everything from cars to construction materials to kitchen appliances.

And the public has no formal way to object.

The Section 232 tariff revisions take effect April 6. Businesses have no transition period, no grace window, and no petition process. Just higher costs and less transparency.

This is what economic nationalism looks like in practice: politically connected industries get protection, everyone else gets the bill, and accountability disappears behind closed doors at the Commerce Department.