Steel is an alloy having great properties such as formability and durability, good tensile and yield strength and good thermal conductivity. As well as resistance to corrosion. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons.
Steels are a large family of metals. All of them are alloys in which iron is mixed with carbon and other elements. Steels are described as mild, medium- or high-carbon steels according to the percentage of carbon they contain, although this is never greater than about 1.5%.Adding metals such as nickel, chromium, and tungsten to iron produces a wide range of alloy steels, including stainless steel and high speed steels.