Quenching and Tempering (Temple y Revenido): Perhaps the most famous section, it details how to achieve maximum hardness through quenching and then restore toughness through tempering.
The book, first published by Editorial Dossat (Madrid), has gone through multiple reprints due to high demand. It is structured as a comprehensive manual covering every aspect of steel heat treatment. The table of contents typically includes: Quenching and Tempering (Temple y Revenido): Perhaps the