WTO hears widespread criticism of U.S. steel tariff plan
China, the European Union, Brazil, Australia, Taiwan and Russia were raising concerns.
Trump's recourse to a Cold War-era trade law would allow him to restrict imports of goods deemed critical to national defence.
But invoking national defence is all but taboo at the WTO, the arbiter of international trade rules since 1995, because some trade experts think it could make it easy for countries to escape their international trade obligations.
China and the EU both told the WTO's Goods Council that the "section 232" tariffs could not be justified on national security grounds, said a trade official who attended Friday's meeting, while others were concerned about a potential risk to the world trading system itself.
The Trump administration is studying the case for the potential new tariffs but delayed publication of the eagerly awaited study until after the president has spoken with G20 leaders in Germany next week, an administration official said on Thursday.
That did not stop a few pre-emptive strikes at the WTO, with the EU's representative at the meeting saying the bloc might bear the brunt of U.S. tariffs because Chinese exports are already largely subject to U.S. restrictions and Canada and Mexico are likely to be exempt.
The EU would "be firm in taking all necessary actions" if its exports are restricted, the official said, adding that a proliferation of such tariffs would cause unacceptable systemic risks - a concern echoed by other countries at the meeting. ■