What Changed
Effective March 4, 2025Copper semi-finished products (HTS Chapter 74) were added to Section 232 national security tariffs effective March 4, 2025, as part of the broader expansion of the Section 232 framework to cover critical industrial inputs. The initial copper rate was set at 25% before being raised to 50% on June 4, 2025 along with steel and aluminum.
Rate Changes
| Item | Before | After |
|---|---|---|
| Copper semi-finished (HTS 74) | 0% S232 | 25% S232 (initial) |
Who's Affected
US importers of copper wire rod, tubes, pipes, and semi-finished copper products. Electrical manufacturers, construction companies, and electronics producers that use copper inputs face higher costs. Copper is a critical material for electrical wiring, plumbing, and renewable energy systems.
Analysis
Copper Added to Section 232 National Security Tariffs (effective 2025-03-04). Copper semi-finished products (HTS Chapter 74) were added to Section 232 national security tariffs effective March 4, 2025, as part of the broader expansion of the Section 232 framework to cover critical industrial inputs. Section 232 of the Trade Expansion Act of 1962 authorizes the President to impose tariffs or quotas on imports when the Department of Commerce determines that the import levels threaten to impair national security. The statute provides broad executive authority and has been used extensively since 2018 to cover steel and aluminum, with subsequent expansions to copper, automobiles, lumber, and semiconductors. Section 232 tariffs are notably permanent in character — unlike Section 122, they carry no statutory expiration and can remain in effect indefinitely once imposed. Products covered by Section 232 are exempt from the Section 122 surcharge under the February 2026 proclamation, meaning importers of S232-covered goods do not face double-stacking of these two tariff authorities. However, S232 rates do stack on top of MFN base rates, and China-origin products that fall under Section 301 may face additional tariff layers on top of S232. The expansion of Section 232 to cover copper in March 2025 and semiconductors in January 2026 reflects a broader industrial policy strategy to protect domestic manufacturing capacity in strategic sectors. Importers of S232-covered products should verify the exact HTS classification of their goods and confirm whether any country-specific exemptions or quotas apply to their sourcing country.
Impact & Next Steps
Manufacturers and importers of S232-covered products should work with licensed customs brokers to verify HTS classifications and ensure correct duty application. Country-of-origin documentation is critical: the S232 tariffs apply to the country where the product was substantially transformed, not simply where it was last shipped from. Some S232-covered products have product-exclusion processes through the Department of Commerce; check current exclusion orders before assuming the full rate applies to your specific product.