I had given a glass ball to the wife of a friend, whose visions proved so startling and on one occasion so unholy that she ceased to make experiments. One day my friend's secretary, a young student and golfer, took up the ball. "I see a fie... Read more of The Cow With The Bell at Scary Stories.caInformational Site Network Informational
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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

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

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

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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

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

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

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



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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