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The most important property of the electrical steels used for this application is the permeability.
Non-oriented fully processed electrical steels (as M600-50A) have guaranteed magnetic properties, in accordance with (or exceeding the levels required by) EN 10106. As well as the maximum loss and minimum polarisation levels cited, full magnetic characterisation curves regarding losses, polarisation, permeability and apparent power at different frequencies are available on request.
M330P-50A is a fully processed high permeability and high thermal conductivity grade. Its thermal conductivity is higher than the conductivity of the fully processed standard grades. This grade generates not only increased efficiency, but also a higher specific power rating.
Semi-processed standard grades (as M450-50K) have guaranteed magnetic properties in accordance with EN 10341. The magnetic properties are developed during the final annealing cycle, which is performed by the client after punching the laminations. This annealing treatment reduces losses and improves permeability and polarisation, as a result of recrystallisation, grain growth and also - for certain grades - decarburisation.
