Manganese





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.





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