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Steel Making

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

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

Critical Points
One of the most important means of investigating the properti...

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Hardening
Steel is hardened by quenching from above the upper critical....

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

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

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

The Modern Hardening Room
A hardening room of today means a very different place from ...

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

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

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

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...



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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