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

Steel Making

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

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

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

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

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

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

Annealing Work
With the exception of several of the higher types of alloy s...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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

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

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

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...



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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