The rise in US steel and aluminium tariffs to 50% is the second time since March that Donald Trump has taken action to protect production of the metals in the US.

The United States doubled tariffs on steel and aluminium imports on Wednesday, activating a hike in the duties on the imported metals to 50% from the 25% rate introduced in March. The day also marks the Trump administration’s deadline for trading partners to submit their “best offers” to avoid further steep import duties set to take effect in early July.

The recent decision by President Donald Trump to double tariffs on steel and aluminum imports from 25% to 50% has sent ripples through the international trade community. This move, justified by Trump as a means to further secure the U.