Steel and aluminum just got a lot more expensive.

For a marketplace, I'm Sabree Beneshore and for David Brancaccio.

It's not just tariffs on steel and aluminum that go into effect today.

It's tariffs on hundreds of products made from those metals, air conditioner parts,

aircraft parts, kitchen appliances, nuts and bolts, bulldozer blades.

Marketplace is Nova Saffo.

Is here with more.

Hi, Nova.

Good morning, Sabri.

So technically, we actually already had some steel and aluminum tariffs in place.

This is an expansion of them.

Can you break that down for us?

That's right.

These tariffs date back to the first Trump administration, still in the

loomum tariffs, but there were a lot of exemptions along the way. For example, some countries like

Japan had quotas with which they could export to the U.S. a certain amount of product before the

higher tariffs kicked in. Now, that's all gone now. All of those derivative products also were

excluded before. Now they're facing import levies.

So all of this is a big change. Analysis from the Boston Consulting Group found that the new

tariff rules more than double the amount of steel imports alone, Sabri, which are facing

new import taxes. And what should we expect the consequences of this to be? Well, President Trump says he's seeking

to bring more manufacturing to the U.S. to expand steel and aluminum factories, but also others,

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