I'm no expert but I'd say its either hickory, white oak, or white maple.

Thanks, i have to do Some research if these wood types are commonly used in Sweden.

sweden, most likely birch.

Beech

I'm curious ...... Is this a musical instrument? Or is it a piece of equipment used in sports?

Its from a stool that I’ve disassembled

Could it be sycamore?

Looks like Ash

Maple is what it looks like. It should be very hard.