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Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

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

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

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

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

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

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

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

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

Connecting Rods
The material used for all connecting rods on the Liberty engi...

Nickel-chromium
A combination of the characteristics of nickel and the charac...

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



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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