The White House has announced some countries may be exempt from US plans to impose tariffs on metal imports.
The exemptions - on national security grounds - included Canada and Mexico.
Reports, however, suggested the apparent softening of the US stance would last for only 30 days.
US President Donald Trump has said steel products will face a 25 per cent tariff, with 10 per cent on aluminium goods.
He is expected to sign the plan on Thursday.
Mr. Trump tweeted Thursday morning that he was looking forward to a meeting later in the day on the matter.