This document specifies guidelines and requirements for conducting life cycle inventory (LCI) studies of steel products reflecting steel’s capacity for closed-loop recycling, including:

1. specification of the declared unit used for LCI calculation of steel products;
2. definition of the system boundaries used for LCI calculation of steel products;
3. evaluation of scrap in LCI calculation of steel products;
4. evaluation of co-products in LCI calculation of steel products;
5. reporting of LCI calculation results of steel products.

The application of LCI results, including life cycle impact assessment (LCIA), is outside the scope of this document.