Cold Rolled Grain-oriented steel (CRGO) Cold Rolled Non Grain-oriented steel (CRNGO )

Grain-oriented electrical steel usually has a silicon level of 3% (Si:11Fe) unless otherwise specified by clients. It is processed in such a way that the optimum properties are developed in the rolling direction, due to a tight control of the crystal orientation relative to the sheet. The magnetic flux density is increased by 30% in the coil rolling direction, although its magnetic saturation is decreased by 5%. It is used for the cores of power and distribution transformers.

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.


CRNGO is less expensive than CRGO, and is used when cost is more important than efficiency, and for applications where the direction of magnetic flux is not constant, as in electric motors and generators with moving parts. It can be used when there is insufficient space to orient components to take advantage of the directional properties of grain-oriented electrical steel.