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Steel Making

Air-hardening Steels
These steels are recommended for boring, turning and planing...

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

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

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

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

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

Chromium
Chromium when alloyed with steel, has the characteristic func...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

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

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

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

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

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

Annealing
There is no mystery or secret about the proper annealing of d...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

Gears
The material used for all gears on the Liberty engine was sel...



Manganese






Category: COMPOSITION AND PROPERTIES OF STEEL

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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