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Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Conclusions
Martien was probably never a serious contender for the honor ...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

Bessemer Process
The bessemer process consists of charging molten pig iron int...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

Annealing
There is no mystery or secret about the proper annealing of d...

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...



Non-shrinking Oil-hardening Steels






Category: ALLOYS AND THEIR EFFECT UPON STEEL

Certain steels have a very low rate of expansion and contraction
in hardening and are very desirable for test plugs, gages, punches
and dies, for milling cutters, taps, reamers, hard steel bushings
and similar work.

It is recommended that for forging these steels it be heated slowly
and uniformly to a bright red, but not in a direct flame or blast.
Harden at a dull red heat, about 1,300 deg.F. A clean coal or coke
fire, or a good muffle-gas furnace will give best results. Fish
oil is good for quenching although in some cases warm water will
give excellent results. The steel should be kept moving in the bath
until perfectly cold. Heated and cooled in this way the steel is
very tough, takes a good cutting edge and has very little expansion
or contraction which makes it desirable for long taps where the
accuracy of lead is important.

The composition of these steels is as follows:

Per cent
Manganese 1.40 to 1.60
Carbon 0.80 to 0.90
Vanadium 0.20 to 0.25





Next: Effect Of A Small Amount Of Copper In Medium-carbon Steel

Previous: Properties Of Alloy Steels



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