Steel is not a single product. There are more than 3,500 different grades of steel with many different physical, chemical, and environmental properties.

Approximately 75% of modern steels have been developed in the past 20 years. If the Eiffel Tower were to be rebuilt today, the engineers would only need one-third of the steel that was originally used.

Modern cars are built with new steels that are stronger but up to 35% lighter than in the past.

Carbon structural steel is the most widely used and the largest number of all steels. It is usually rolled into steel, profiles and profiled materials, which are generally used directly without heat treatment and are mainly used for general structures and projects.