President Donald Trump on Tuesday launched a probe into potential new tariffs on copper imports, saying they would help rebuild U.S. production.

The U.S. industrial sector will have the most to lose from potential U.S. tariffs on copper, analysts say, with costs seen rising significantly during what would be a lengthy process of reviving domestic mining and refining of the metal.

Trump’s plan to expand aluminum tariffs spells higher costs for can and component makers, but aluminum producers say imports have held down prices.