The Equilibrium Diagram: A Simple Explanation for Prospective Ground Engineers of the Iron‐Carbon Constitution Diagram Available to Purchase

THE following notes are being written solely for the benefit of ground engineers who are endeavouring to acquire the necessary knowledge to obtain a D licence. A licence in Category D demands a knowledge of the heat treatment of steels. Practical experience is, of course, quite as essential in this as in other and allied branches of engineering, but a theoretical study of the reasons for, and the results of, different heat treatment, is equally essential for a complete understanding of the subject.