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Steel Making

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

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

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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

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

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

It is considered good practice to quench alloy steels from th...

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

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

Molybdenum steels have been made commercially for twenty-five...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

SILICON is a very widespread element (symbol Si), being an es...

Silicon prevents, to a large extent, defects such as gas bubb...

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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

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



Molybdenum steels have been made commercially for twenty-five years,
but they have not been widely exploited until since the war. Very
large resources of molybdenum have been developed in America, and
the mining companies who are equipped to produce the metal are
very active in advertising the advantages of molybdenum steels.

It was early found that 1 part molybdenum was the equivalent of from
2 to 2-1/2 parts of tungsten in tool steels, and magnet steels. It
fell into disrepute as an alloy for high-speed tool steel, however,
because it was found that the molybdenum was driven out of the
surface of the tool during forging and heat treating.

Within the last few years it has been found that the presence of
less than 1 per cent of molybdenum greatly enhances certain properties
of heat-treated carbon and alloy steels used for automobiles and
high-grade machinery.

In general, molybdenum when added to an alloy steel, increases the
figure for reduction of area, which is considered a good measure
of toughness. Molybdenum steels are also relatively insensible
to variations in heat treatment; that is to say, a
chromium-nickel-molybdenum steel after quenching in oil from 1,450 deg.F.
may be drawn at any temperature between 900 and 1,100 deg.F. with
substantially the same result (static tensile properties and hardness).

Next: Silicon

Previous: Tungsten

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