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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

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

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

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

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

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

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

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

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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

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

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

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

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

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...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...



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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