Scrap is the name given to all substances and materials that have lost their ability to be reused in general, have no functional value, and are out of date. In developed countries in terms of industry and economy, scrap is as valuable as new products. This is because they are generally used in the recycling process known as recycle.

Waste, which is the surplus of industrial production that has become scrap, can be converted into different products and used in different sectors. In other words, the scrap in question does not necessarily need to be used in the same sector, on the contrary, they are recycled to be used in other sectors.