In general, steel is composed of iron and carbon and several other elements such as nickel, magnesium, manganese, etc. It turns out that its carbon percentage can vary up to 2.1%. The most important element of this alloy is iron, so if the amount of iron in this alloy is below 50%, this alloy is no longer steel. Also, if you come across an alloy of iron and carbon that has more than this amount of carbon in it, that alloy is not steel but cast iron. One of the most important alloys produced by mankind throughout history is certainly steel. Today, this alloy is the most widely used industrial alloy in the world, and there are few industries where steel does not have a direct impact. The beginning of the steel industry in Iran dates back to fourteen centuries before Christ, but the development and expansion of this industry has occurred in the last century.

When we hear the name of steel, the first thing that comes to our mind is the very high strength of this alloy, but this point alone is not a sufficient reason for this amount of steel consumption in the industry, so in short, to state the properties of steel that make this alloy into It has become the most widely used alloy in the world. We will discuss: