High Speed Steel





For centuries the secret art of making tool steel was handed down

from father to son. The manufacture of tool steel is still an art

which, by the aid of science, has lost much of its secrecy; yet

tool steel is today made by practical men skilled as melters,

hammer-men, and rollers, each knowing his art. These practical

men willingly accept guidance from the chemist and metallurgists.



A knowledge of conditions existing today in the manufacture of

high-speed steel is essential to steel treaters. It is well for

the manufacturer to have steel treaters understand some of his

troubles and difficulties, so that they will better comprehend the

necessity of certain trade customs and practices, and, realizing

the manufacturer's desire to cooperate with them, will reciprocate.



The manufacturer of high-speed steel knows and appreciates the

troubles and difficulties that may sometimes arise in the heat-treating

of his product. His aim is to make a uniform steel that will best

meet the requirements of the average machine shop on general work,

and at the same time allow the widest variation in heat treatment

to give desired results.



High speed steel is one of the most complex alloys known. A

representative steel contains approximately 24 per cent of alloying

metals, namely, tungsten, chromium, vanadium, silicon, manganese,

and in addition there is often found cobalt, molybdenum, uranium,

nickel, tin, copper and arsenic.





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