2ndSSI is a mix of scrap iron with plastic, textiles and foams. Non-metallic material presence in this sub-product is not in conformity with the extraction process role. Scrap merchant who purchase this mix consider that scrap iron represent only 40% of the total mass of this mixture. Therefore they buy it cheaper than first step scrap iron, considering they have to implement another selecting step. Improvement of second step scrap iron only implies a technological change on the treatment chain. It consists in a structural optimization of the present implantation.