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Steel Making

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

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

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

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

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

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

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

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

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

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

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

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

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...



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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