President Donald Trump on Monday signed a proclamation amending his Section 232 national security tariffs on some aluminum, steel and copper imports, the White House said.

Steel rolls from China are seen after being unloaded at the Valparaiso port, Chile July 10, 2025. REUTERS/Rodrigo Garrido

• The proclamation lowers tariffs on some steel and aluminum derivative products, including certain types of agricultural machinery and residential heating, air conditioning and ventilation equipment to 15% from 25% previously.

• It makes mobile industrial equipment, such as bulldozers and forklifts, subject to a 15% tariff "when imported from trade deal countries that are entitled to such treatment," the White House said in a statement.

• The order also allows foreign companies to qualify for a 10% tariff if "their capital equipment includes at least 85% U.S. melted and poured or smelted and cast steel or aluminum by weight."

• The order adds two new categories of steel and aluminum derivative import products that will be subject to 25% duties: steel racks and aluminum lithographic plates.

• The adjustments will become effective for goods imported or withdrawn from bonded warehouses after 12:01 a.m. EST (0401 GMT) on June 8.

• The changes will remain in place until December 31, 2027 "to spur near–term investments that will rebuild the Nation’s industrial base," the White House said.