Ello kiddo! Boron steel is a type of metal that is tough and strong, like a superhero. It's called "boron" because it has a special ingredient called boron that makes it extra strong.
This steel is used in things like cars and airplanes because it can keep you safe if you ever get into an accident. It's like wearing a really strong helmet when you ride your bike, you feel protected and safe.
Boron steel is made by heating regular steel to a super high temperature and adding boron to the mix. This makes the steel extra tough and resistant to breaking. It's pretty cool, isn't it?