Alright kiddo, let me explain steel grades in a way that you can easily understand. You know how there are different kinds of candy, right? Like lollipops, gummy bears, and chocolate bars. Well, steel is kind of like candy, but for buildings, cars, and other things that are made of metal.
Now, just like how candy has different flavors and sizes, steel also comes in different types called grades. Each steel grade is like a different flavor of candy, with unique properties and uses.
For example, some steel grades might be really strong and sturdy, like a big chocolate bar that can withstand being dropped or hit. Others might be more flexible, like a gummy bear that can bend and twist without breaking.
So, if someone needs to build a skyscraper, they might use a very strong steel grade that can support the weight of the building. But if they're making a car, they might use a more flexible steel grade that can bend without cracking or breaking.
Overall, steel grades are just different types of steel that have specific properties and uses. It's kind of like how you have different types of candy for different occasions and tastes!