Electrical steels play a vital role in the generation, transmission, distribution and use of electrical power and are one of the most important magnetic materials produced today.
There are three principle types
Grain oriented steels
These are are 3% silicon-iron alloys developed with a grain orientation to provide very low power loss and high permeability in the rolling direction, for high efficiency transformers.
These materials are sold under the Unisil trademark. Unisil H is a high permeability grade which offers extremely low power loss.
Non oriented fully processed steels
These are iron-silicon alloys with varying silicon contents and have similar magnetic properties in all directions in the plan of the sheet. They are principally used for motors, generators, alternators, ballasts, small transformers and a variety of other electromagnetic applications.
A wide range of products, including a newly developed thin gauge material for high frequency applications, are available.
Non oriented semi processed steels
These are largely non silicon alloys sold in the not finally annealed condition to enhance punchability. Low power loss and good permeability properties are developed after final annealing of the laminations. These materials are sold under the Newcor and Polycor trademarks.
These products are available from Cogent Power Ltd, a wholly-owned subsidiary of Tata Steel. More information is available from www.cogent-power.com.