Please let us know if you have feedbackThe U.S. Commerce Department is proposing Section 232 duties on 14 additional steel, aluminum and copper derivatives, ranging from brass wind instruments and floor safes to tanker trailers and semi-trailers. More steel, aluminum and copper products could face tariffs The 14 aluminum, copper and steel derivatives the Commerce Department is proposing be added to Section 232 tariffs. The Commerce Department's plan stems from a series of Trump administration actions on steel, aluminum, copper and their derivatives. In April, President Donald Trump signed a proclamation imposing a 50% tariff on goods made almost entirely of aluminum, steel or copper, including steel coils and aluminum sheets. Most recently, the U.S. expanded the list of goods subject to Section 232 steel and aluminum tariffs.