The tit-for-tat measures are the latest escalation in an increasingly protracted trade dispute between the world's two largest economies.
US President Donald Trump has upped the ante on China as his administration may be about to slap tariffs of up to 25 percent on an additional $200 billion in Chinese goods.
The EU leadership is willing to forge new alliances to overcome Trump's harsh trade policies and secure its borders without Washington's support.
The US president signed proclamations allowing relief from the quotas on steel from South Korea, Brazil and Argentina and on aluminium from Argentina.
Turkey has lodged a complaint with the WTO following the US decision to impose tariffs of 20 and 50 percent respectively steel and aluminium imports from Turkey.
The Trump administration has severely been criticised by automakers, foreign governments as it considers tariffs of up to 25 percent, a levy critics warn will hike vehicle costs, hurting auto sales and global industry jobs.
Pig farmers in the US state of Nebraska have started to feel the impact of China's tit-for-tat imposition of tariffs.
Beijing warns of "necessary countermeasures" as Washington announces 10 percent tariffs on Chinese goods, upping the ante in its trade dispute with the Asian economic giant.
French Finance Minister Bruno Le Maire said on Sunday that the EU should take united action against possible further tariffs on the European goods by the US. Earlier, Germany announced that it would back a lowering of EU levies on imports of US cars.
US President Donald Trump said tariffs on an additional $16 billion in Chinese goods are set to take effect in two weeks. Beijing warned of "counterattack" but gave no immediate details of possible retaliation.
China's commerce ministry says Beijing has "no choice but to fight" as US prepares for enforcing tariffs on more than $34 billion in Chinese imports from Friday.
Harley-Davidson, the dominant player in the heavyweight US motorcycle market, has said it would focus on shifting some US production to avoid EU retaliatory tariffs.
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