The term recycling refers to all those strategies and methods aimed at recovering useful materials from waste in order to reuse them, rather than throwing them away and disposing of them directly in landfills. Recycled material prevents waste of potentially still useful materials, ensures greater sustainability of production cycles, reduces consumption of raw materials, lowers energy use and associated greenhouse gas emissions.

In particular, metal recycling is of fundamental importance as it allows us to considerably reduce mining activities and their impact on the planet's natural reserves; it is safe to say that, since steel is infinitely recyclable,, it is one of the greenest materials in the world. Thanks to this peculiarity, the material is never consumed but continuously transformed, recycled, and this perfectly describes the concept of "permanent material" at the basis of the circular economy, a sort of perpetual motion that sees the primary materials extracted and transformed into finished products that, at the end of their life cycle, end up being recycled and reintroduced into the production process with significant savings in energy consumption and raw materials.