A patent has been secured in England, by Mr. P. G. Gardner, of New York city, for manufacturing steel of a very soft and tough quality. Common cast steel is taken and melted in crucibles in the usual way; then poured into highly heated molds, to which the molten metal will not adhere, and kept at a high heat for six hours. After this, it is allowed to cool to a cherry red heat, when it is plunged into oil of 700 Fah., and kept at this temperature for seven hours. It is now cooled slowly, and found to be very soft and malleable.
This article was originally published with the title "Making Tough Steel"