Chinese steel is overabundant since a sharp slowdown in the Asian giant's economy has sapped domestic demand, and is shipping to world markets at cut-down prices.
"China now sells its excess steel to the EU market at prices that do not even cover its costs for raw materials and material transformation," Charles de Lusignan, communications manager at steel lobbyist Eurofer, told AFP.
Experts on both sides of the Atlantic say China, which alone produces half of the world's steel, is sitting on an overproduction of 340 million tonnes, which is twice the amount the European Union produces in a year.
ArcelorMittal, the world's biggest integrated steel and mining company, pointed the finger at China when its share price fell to historic lows in the autumn.
More From This Section
"The overcapacity situation (in China) has led to a significant increase in exports to the world's markets," said Aditya Mittal, the company's CEO, singling out the company's core markets of Europe and the United States.
US producers say they too are feeling the pain.
Steelmakers in the EU and the US have turned to their governments and the World Trade Organization to stop the Chinese steel assault.
Some are listening. French Economy Minister Emmanuel Macron warned a month ago that Europe would not accept the "Chinese dumping".
European ministers in charge of steel have acknowledged "the gravity of the situation" but producers want immediate action.
They have started lobbying the WTO to resist China's push to win the coveted "market economy" status, which would make it easier for China's companies to defend themselves in anti-dumping cases.
The EU, meanwhile, has started challenging China, slapping anti-dumping taxes on stainless steel imports from China last March.
And in May, the EU opened an investigation into the import of a number of steel products from China and Russia.
The steel crisis came up in talks between Chinese President Xi Jinping and British Prime Minister David Cameron in October.
Cameron's spokeswoman said he had "made clear there were challenges" but would not say whether he had used the phrase "dumping" during the discussion.