An alloy of iron mixed with carbon and other elements. It means that steel is a large family of iron. We can describe the steel by the percentage of carbon it contains and it can never be more than 1.5%.which make it mild or medium or high carbon steel.

Percentage of carbon it types of steel:

• Mild steel up to 0.25%
• Medium carbon steel 0.25 to 0.45
• High carbon steel 0.45 to 1.50 %

A rang of alloy, High speed steel, and stainless steel can be made by adding metals such as nickel, chromium, and tungsten.

What are the properties of steel?

To explain that let's compare steel used for drink can and the one used for scissors, the hardness in scissors come from the 20 times carbon more than it is in the drink can. That means the percentage of carbon make the properties of steel and what it's used for.

Another method used to make properties of steel matches its job is called Heat treatment cooling red hot tool steel rapidly in cold water makes it harder and more brittle but keeping it at red heat for longer time then cooling it slowly make it softer and that's how this method works.