EU member states have backed countermeasures against the US, on the day Donald Trump's 20% tariff was imposed on the bloc.
This European vote is in response to earlier US tariffs made on imports of steel and aluminium from the EU, announced last month and amounting to a 25% levy.
In a statement, the European Commission said: "The EU considers US tariffs unjustified and damaging, causing economic harm to both sides, as well as the global economy.
"The EU has stated its clear preference to find negotiated outcomes with the US, which would be balanced and mutually beneficial."
The countermeasures - mostly duties of 25% on a range of imports to Europe from the US - will come into force next week, on 15 April, and can be suspended "at any time", the commission said, if the US agrees to a "fair and balanced negotiated outcome".
The bloc is still weighing up how to respond to Trump's latest tariffs.