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Steel Making

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

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

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

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

Hardening
Steel is hardened by quenching from above the upper critical....

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...



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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