The U.S.' additional tariffs on steel imports from Turkey will take effect today, according to an announcement by the White House and Department of Commerce.
"To further reduce imports of steel articles and increase domestic capacity utilization, I have determined that it is necessary and appropriate to impose a 50 percent ad valorem tariff on steel articles imported from Turkey, beginning on August 13, 2018," Trump said in a proclamation released by the White House.
Commerce Secretary Wilbur Ross said in a statement that Trump increased the tariff rate from 25 percent to 50 percent on imports of Turkish steel.
"Doubling the tariff on imports of steel from Turkey will further reduce these imports that the Department found threaten to impair national security as defined in Section 232," he added.
Trump said Friday on Twitter that he authorized the doubling of tariffs, noting that "aluminum will now be 20 percent and steel 50 percent. Our relations with Turkey are not good at this time!"
The White House and Commerce Department's statements did not mention the tariffs on aluminum.
The new U.S. tariffs on Turkey are against the rules set by the World Trade Organization (WTO), the Trade Ministry said in a statement.
"Turkey, as it determines and implements its own trade policy in compliance with the World Trade Organization, expects other member countries to comply with international rules," the ministry said.
The statement added that the ministry will continue to support Turkey's iron, steel and aluminum exporters by defending their interests against illegal practices of other countries on every international platform, especially WTO."
Turkey's steel exports were valued at $11.5 billion last year, accounting for 7.3 percent of its total exports worth $157 billion, according to the Turkish Steel Exporters' Association.
The U.S. was the top destination for Turkish steel exports in 2017, which were worth $1.1 billion.
Turkey came in sixth place among the countries the U.S. imported steel from last year, while Turkish steel's share was 7 percent of total U.S. steel imports.