It said it wanted details from Saturday's talks with U.S. Trade Representative Robert Lighthizer in Brussels but that it did not expect the meeting to resolve all the problems. Under World Trade Organization rules, such counter-measures have to be in place within 90 days of the US tariffs entering force.
Lighthizer didn't comment publicly after the meetings.
It has also opened the door to a slew of complaints to the World Trade Organisation (WTO), which has never ruled on a dispute involving trade restrictions justified on national-security grounds. Not fair or sustainable.
Trump is opening up one-on-one trade talks with countries on the new tariffs, to see if he can win concessions for the U.S.
The EU has become increasingly exasperated with Mr Trump's "America First" agenda, viewing it as a threat to the multilateral trade order that the USA played a leading role in building after the second World War.
Trump set import tariffs on Thursday of 25 percent on steel and 10 percent on aluminium.
The US president's plan would affect European Union steel exports, valued at €5.3 billion and aluminium exports worth €1.1 billion past year, and has opened the door to the prospect of an imminent transatlantic trade war.
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Along with the approval, the FDA is setting up special controls to ensure the test's accuracy and performance, the agency said. Statistics show roughly one in eight women will develop invasive breast cancer over the course of their lifetime.
"The European Union has chose to respond clearly to the USA measures and as the federal government we support this position", government spokesman Georg Streiter told a regular news conference.
Brussels has prepared a list of United States products to hit with countermeasures if its exports are affected by the tariffs, but says it hopes to join Canada and Mexico in being exempted.
The European Union and Japan are seeking to be excluded from U.S. steel and aluminium tariffs in talks with U.S. President Donald Trump's trade envoy on Saturday, with the EU warning it will retaliate if Washington does not relent.
UK Steel says 7% of its steel exports go to the U.S., worth £360m.
Foreign steel producers are not only concerned about losing access to the USA market but also that steel from other exporters will flood already saturated markets, threatening jobs elsewhere.
The EU shares American concerns about overcapacity in the global steel sector, Malmstroem said, but warned "this is not the right way to deal with it".