UK ministers were among the "ringleaders" blocking higher tariffs on Chinese steel, the body representing the UK steel industry has told AMs.
UK Steel policy chief Dominic King also accused the EU of saying to Chinese producers "please dump here".
In January, Tata announced it was cutting 750 steel jobs in Port Talbot, out of more than 1,000 going in the UK.
Welsh Secretary Stephen Crabb said the UK government would continue to do "all it can" to help the industry.
Leading figures from the steel sector were giving evidence to the assembly's enterprise and business committee on Thursday.
'Wake up'
Mr King compared a new 266% tariff on Chinese coiled steel into the United States, with a 16% tariff for Chinese imports into the EU.
"We see the European Commission as not really having the teeth to deal with the flooding of Chinese exports into not just the UK, but Europe as a whole," he said.
"The UK has a perfect storm but the rest of Europe is starting to be hit as well."
Economy Minister Edwina Hart told the committee that unless tariffs on Chinese steel exports were increased "we won't have the luxury of talking about steel because there won't be steel".
"Europe's got to wake up and smell the coffee ... we've got to have an industry in Europe that produces for Europe," she said.
In February, the European Commission announced it was opening three investigations into steel products made in China, saying it would not allow "unfair competition" to threaten Europe.
Source: BBC .com