President Donald Trump announced a 50% tariff on copper imports to take effect on Aug. 1, impacting industries relying on the metal like automobiles and appliances.
The tariff is part of Trump's efforts to boost domestic mining and metal processing, following previous tariffs on steel and aluminum imports.
Global producers have hurried to deliver copper ahead of the tariff implementation, with traders sending record volumes of the metal to the US since February.
Country-by-country tariffs with major trade partners are also being finalized by the White House, scheduled to come into effect on Aug. 1.