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Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Annealing Work
With the exception of several of the higher types of alloy s...

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Care In Annealing
Not only will benefits in machining be found by careful anne...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

Alloying Elements
Commercial steels of even the simplest types are therefore p...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

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

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

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

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

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



High-carbon Machinery Steel






Category: ANNEALING

The carbon content of this steel is above 30 points and is hardly
ever above 60 points or 0.60 per cent. Annealing such steel is
generally in quantity production and does not require the care that
the other steels need because it is very largely a much cheaper
product and a great deal of material is generally removed from
the outside surface.

The purpose for which this steel is annealed is a deciding factor
as to what heat to give it. If it is for machineability only, the
steel requires to be brought up slowly to just below the critical and
then slowly cooled in the furnace or ash pit. It must be thoroughly
covered so that there will be no access of cool air. If the annealing
is to increase ductility to the maximum extent it should be slowly
heated to slightly over the upper critical temperature and kept at
this heat for a length of time necessary for a thorough penetration
to the core, after which it can be cooled to about 1,200 deg.F., then
reheated to about 1,360 deg.F., when it can be removed and put in an
ash pit or covered with lime. If the annealing is just to relieve
strains, slow heating is not necessary, but the steel must be brought
up to a temperature not much less than a forging or rolling heat
and gradually cooled. Covering in this case is only necessary in
steel of a carbon content of more than 40 points.





Next: Annealing In Bone

Previous: Annealing Alloy Steel



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