A few secrets of the metallurgist simply told

by Gerald W. Hinkley

APPENDIX.

ANALYSIS, USES AND HEAT TREATMENT OF VARIOUS GRADES OF TOOL STEELS.

Providing the many complications and difficulties which accompany the melting, hammering, rolling, annealing, inspecting and finishing operations, have been successfully accomplished, the chemical analysis of the best grades of tool steel should come within the following limits: