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Non-oriented electrical silicon steel (image made with magneto-optical sensor and polarizer microscope) Electrical steel made without special processing to control crystal orientation, non-oriented steel, usually has a silicon level of 2 to 3.5% and has similar magnetic properties in all directions, i.e., it is isotropic.
Further increase in silicon concentration impairs the steel's mechanical properties, causing difficulties for rolling due to brittleness. Among the two types of silicon steel , grain-oriented (GO) and grain non-oriented (GNO), GO is most desirable for magnetic cores.
non oriented D (formerly B) " non-alloy semi-finished (not finally annealed) E " alloy semi-finished (not finally annealed) K (=D+E) " non-alloy and alloy electrical steel sheet/strip in the semi-processed state N " for normal grain oriented products P: 1.7 T @50 Hz high permeability grain oriented S" conventional grain oriented
For example, 4% electrical steel has an initial relative permeability (at or near 0 T) of 2,000 and a maximum of 38,000 at T = 1 [5] [6] and different range of values at different percent of Si and manufacturing process, and, indeed, the relative permeability of any material at a sufficiently high field strength trends toward 1 (at magnetic ...
Electromagnetic dynamic magnetic domain motion of grain oriented electrical silicon steel Moving domain walls in a grain of silicon steel caused by an increasing external magnetic field in the "downward" direction, observed in a Kerr microscope. White areas are domains with magnetization directed up, dark areas are domains with magnetization ...
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Conversely, there are non-magnetic alloys, such as types of stainless steel, composed almost exclusively of ferromagnetic metals. Amorphous (non-crystalline) ferromagnetic metallic alloys can be made by very rapid quenching (cooling) of an alloy.
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