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Steel Making

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

The Influence Of Size
The size of the piece influences the physical properties obta...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Chromium when alloyed with steel, has the characteristic func...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Impact Tests
Impact tests are of considerable importance as an indication ...

Armor plate makers sometimes use the copper ball or Siemens' ...

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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.

Next: Standard Analysis

Previous: Tempering Colors On Carbon Steels

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