President Donald Trump’s latest broadside against Turkish steel is a fresh blow to one of the country’s most important industries and will reshape global trade flows.

Under a higher level of tariffs, Turkey will continue to lose American customers, once its most important steel market. The new tariffs won’t put Turkish steelmakers out of business, but force them to find new markets, likely across North Africa or the Middle East, or displace other imports to Europe.

Donald J. Trump@realDonaldTrumpI have just authorized a doubling of Tariffs on Steel and Aluminum with respect to Turkey as their currency, the Turkish Lira, slides rapidly downward against our very strong Dollar! Aluminum will now be 20% and Steel 50%. Our relations with Turkey are not good at this time!

Sent via Twitter for iPhone.

“It’s certainly a challenge for Turkey’s steel,” Colin Hamilton, managing director for commodities research at BMO Capital Markets, said in an email. “They mainly import scrap, which has just become more expensive in Lira terms, and export products. ”

The U.S. plans to double tariffs on the nation’s steel to 50 percent, and raise the rate on aluminum to 20 percent, Trump said on Twitter Friday.

Turkey makes up 62 percent of bar used to reinforce concrete and masonry structures coming into the U.S. It also accounts for 37 percent of imported pipes for piling, which is used for foundation support and construction, and 14 percent of cold-rolled sheet. The tariffs will likely put U.S. steel companies in a favorable position, with Nucor Corp., Commercial Metals Co. and Steel Dynamics Inc. set to be among the big beneficiaries, according to Andrew Cosgrove, a senior analyst at Bloomberg Intelligence.

Turkey exported about 500,000 tons to the U.S. in the five months to May, compared with more than 1 million tons in the same period last year, according to data from the U.S. Census bureau. The U.S. has fallen from Turkey’s main steel buyer to number three.

Steel, in its more basic form of slabs, sheet or reinforcing bar, is a highly liquid market and it’s usually easy for a company to find a new buyer. Attacking imports has become a favorite tool of politicians from Europe to the U.S., causing flows to be rerouted. The global industry has been described as a game of whack-a-mole; if exports are blocked in one market, the action shifts elsewhere.

Turkey ranks as the world’s sixth-biggest steel producer. In aluminum, it’s 31,a tiny player. The U.S. imported about 4,500 tons of aluminum bars, rods and profiles from the country in 2017, according to World Bank statistics.

The U.S. measures are designed to add pressure on Turkey to release an American pastor and will further squeeze an economy that’s being engulfed by a financial crisis and plunging currency. An index of Turkish steel stocks sank almost 10 percent after the announcement, before recovering some of those losses.

In response to U.S. tariffs earlier this year, Turkey turned its exports toward European countries, such as Italy and Spain. The new U.S. tariffs will heighten fears that even more steel will head to the region, pressuring European producers. Regulators have introduced so-called safeguard measures, which slap tariffs on steel if imports exceed historical averages.

“The tariffs on Turkey itself won’t form a big threat” to Europe, Philip Ngotho, an analyst at ABN Amro Bank NV, said by email. “Europe has measures in place to limit imports of steel into Europe, so that will continue to offer some protection from potentially cheaper and more steel from Turkey.”