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Steel Making

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

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

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Reheating for machine ability was done at 100 deg. less than ...

Hardness Testing
The word hardness is used to express various properties of me...

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

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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



MANGANESE is a metal much like iron. Its chemical symbol is Mn. It
is somewhat more active than iron in many chemical changes--notably
it has what is apparently a stronger attraction for oxygen and
sulphur than has iron. Therefore the metal is used (especially in
the so-called basic process) to free the molten steel of oxygen,
acting in a manner similar to silicon, as explained above. The
compound of manganese and oxygen is readily eliminated from the
metal. Sufficient excess of elemental manganese should remain so
that the purchaser may be sure that the iron has been properly
deoxidized, and to render harmless the traces of sulphur present.
No damage is done by the presence of a little manganese in steel,
quite the reverse. Consequently it is common to find steels containing
from 0.3 to 1.5 per cent.

Next: Alloying Elements

Previous: Silicon

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