CHAPTER VI.

≈What Tool Steel Is Doing Towards Winning the War≈ 85

APPENDIX.

≈Analysis, Uses and Heat Treatment of Various Grades of Tool Steels≈ 92

≈High Speed Steels≈ 93

≈Die Steel for Hot Work≈ 94

≈Special Alloy Steel≈ 95

≈Semi-High Speed Steel≈ 96

≈Simple Carbon Tool Steel≈ 97

≈Non-Shrinking Oil Hardening Steel≈ 98

≈Special Hot Work Alloy Steel≈ 99

A FEW SECRETS OF THE METALLURGIST SIMPLY TOLD

INTRODUCTION.

When as a student at a Technical College of one of our great Universities, I came to the study of Differential and Integral Calculus, I remember that I was seized with a kind of mental paralysis at the thought of the great unknown that lay before me. Fortunately, however, a little book was brought to my attention, under the encouraging title “Calculus Made Easy”. As a matter of fact the little volume did not attempt to take its readers through all the intricacies of the entire subject, but it did succeed in giving a certain start on the long journey which has to be undergone by a student of the Calculus. Its opening sentence was encouraging, which I have always remembered, and which read something as follows:

“What one fool can accomplish, another fool can do, therefore take courage”. This same thought applies to the subject which is now before us.