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In alternating current equipment and machines, in such
places as transformers cores or as magnetic core materials
in motors, the use of plain carbon steel may cause the
electrical losses to be unduly high.
The 1 to 4 per cent silicon steels when used as a replacement
for the plain carbon steels, serves to lessen materially
the electrical losses, they posses increased electrical
resistance, they show relatively little of an aging effect,
and they are at the same time inexpensive alloy steels.
The silicon steel first patented by Sir Robert Hadfield
in about 1900, has made possible the development of more
efficient and more powerful electrical apparatus.
There are two main groups of Silicon Steel: Grain Oriented
and Non Grain Oriented
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