BUENOS AIRES — The world鈥檚 financial leaders rejected protectionism on Tuesday and urged 鈥渇urther dialogue鈥 on trade, but failed to defuse the threat of a trade war days before US metals tariffs take effect and Washington is to announce measures against China.

Finance ministers and central bankers of the world鈥檚 20 biggest economies, which represent 75% of world trade and 85% of global gross domestic product, discussed trade disruptions as a risk to growth at a two-day meeting.

But after talks described by participants as 鈥減olite鈥 and mainly consisting of readout statements with no debate, the G20 agreed only to stand by an ambiguous declaration on trade from 2017 and 鈥渞ecognize鈥 the need for more 鈥渄ialogue and actions.鈥 鈥淲e reaffirm the conclusions of our leaders on trade at the Hamburg Summit and recognize the need for further dialogue and actions. We are working to strengthen contribution of trade to our economies,鈥 the final G20 ministers鈥 statement said.

But the declaration did little to dispel concern over a global trade war as US tariffs of 25% on imported steel and 10% on aluminum take effect on Friday.

Two officials briefed on the matter said US President Donald Trump would also unveil tariffs on up to $60 billion in Chinese technology and telecoms products by Friday, a move stemming from Beijing鈥檚 intellectual property practices.

The 2017 Hamburg declaration, which the financial leaders referred to on Tuesday, said G20 countries would 鈥渃ontinue to fight protectionism including all unfair trade practices.鈥

But it also said G20 leaders 鈥渞ecognize the role of legitimate trade defense instruments,鈥 an ambiguity which provides the United States with a way to argue its cause on the tariffs. US Treasury Secretary Steven Mnuchin made clear in a press conference after the talks that Washington鈥檚 tariff action was such a legitimate defense. — Reuters