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Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Corrosion
This steel like any other steel when distorted by cold worki...

Alloying Elements
Commercial steels of even the simplest types are therefore p...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

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

Conclusions
Martien was probably never a serious contender for the honor ...

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

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

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

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

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

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

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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