Prime Minister Scott Morrison has secured a meeting with US President Donald Trump at the G20 summit.
A White House schedule lists the meeting - known in diplomatic terms as a "pull aside" - after a meeting between Mr Trump and prime ministers of Japan and India on the sidelines of the summit in Buenos Aires.
The prime minister will also meet with French President Emmanuel Macron on Friday local time to talk about the navy submarine contract, cooperation in the Indo-Pacific and fixing the World Trade Organisation.
"Australia has always been a successful trading nation and that's how we will continue to ensure the prosperity for our people," he told reporters after landing in Buenos Aires on Friday morning.
"It's not just for our people, all of the G20 nations have benefited so significantly by their exchanges and trade with each other."
PM Scott Morrison will urge countries at the G20 Summit to keep faith with the global trade system . Source: AAP
The US has hurt the stability of the WTO recently, refusing to appoint new trade judges and threatening to withdraw altogether.
China and the US are also in the middle of a trade war, hiking up tariffs on each other and threatening the global economy.
But Mr Morrison was "optimistic" about the chance for a resolution.
"I believe that both China and the United States are very keen to see a more open trading environment around the world, more trade all across the world and particularly between their two nations and we all benefit from that," he said.
Mr Morrison will meet on Friday local time with European Union leaders to talk about the WTO and an upcoming free trade deal, and Brazilian President Michel Temer to discuss boosting trade.
President Donald Trump and first lady Melania Trump walk from Air Force One. Source: AAP
Trade tensions between the US and China, concern over the murder of Saudi journalist Jamal Khashoggi and calls to put climate action back on track form the background of the summit in the Argentinian capital.
Leaders will seek to talk to Saudi Crown Prince Mohammed bin Salman, who will be attending the summit, amid concerns about the murder of Khashoggi.
Mr Trump and Chinese President Xi Jinping will meet, and a trade deal between the US, Mexico and Canada will potentially be signed.
The G20 includes Argentina, Australia, Brazil, Canada, China, Germany, France, India, Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, South Korea, Turkey, United Kingdom, United States and the European Union.
