Swiss metal suppliers have expressed concern about the announced US tariff rules for steel and aluminium. They expect more uncertainty and a higher administrative burden. “President Trump has strengthened tariffs on imported aluminum, steel, and copper to protect the national security of the United States, including the economic resilience of vital industries and the financial position of American workers,” said the official statement released on Thursday. +Get the most important news from Switzerland in your inbox The proclamation lays down criteria for imposing tariffs of between 10% to 50% on metals and machinery imports and builds on previous actions taken by President Donald Trump using Section 232. The Trump administration credits these tariffs for making the United States the third largest steel producing nation in the world in 2025. “For Swiss machine manufacturers, these changes are likely to mean more complexity, uncertainty and administrative effort in terms of …