USA HISTORY

Detailed explanation-1: -Steel is durable, hard, tough-it’s not a “little-known fact.” Steel is often called the strongest alloy on Earth. Rather than a pure metal, steel is a blend of iron and carbon, both providing the particular characteristics that make steel so very strong. Some metals might just give steel a run for its money, though.

Detailed explanation-2: -Steel has had a major influence on our lives, the cars we drive, the buildings we work in, the homes in which we live and countless other facets in between. Steel is used in our electricity-power-line towers, natural-gas pipelines, machine tools, military weapons-the list is endless.

Detailed explanation-3: -Carbon adds strength If we quench a hot steel, which means cooling it very quickly, the carbon atoms become trapped in the ferrite structure. This forces the creation of a distorted crystal structure known as martensite. Martensite is very hard and is the key reason why steel can be made so strong.

Detailed explanation-4: -Steel is the backbone of modern industry and is used as raw material for almost all industries. Availability of raw materials, cheap labour, transport and market were a few advantages that helped the iron and steel industry to develop in India.

Detailed explanation-5: -The addition of carbon is what distinguishes iron from steel. By weight, steel contains about 2.14% carbon. Although that’s a relatively small amount of carbon, it results in significant physical changes. Steel, for example, is both harder and stronger than pure iron.