NO grades: Non-grain-oriented electrical steel strip compliant with EN 10303

Electrical steel strip for medium to high frequency applications

Electric motors require high-performance electrical steel strip. It is especially suited to use in electric car engines, which can have an RPM several times higher than industrial electric motors. Our non-grain-oriented electrical steel strip featuring a thin strip thickness (NO grades) provides the best possible foundation for this technology.

Fine-tuned permeability and core losses

Because of their good permeability (penetrability for magnetic fields) and low core losses (conversion of a portion of the energy into heat due to eddy currents), our NO grades are ideal for high-frequency applications. A very low nominal thicknesses starting at 0.1 mm (see the table “Thin electrical steel strip”) also contributes to this purpose. This reduced material strength minimizes the occurrence of eddy currents (see the “Eddy current” infographic) in laminated electrical steel strip stacks, making the material suitable for high-frequency applications. All NO grades can be combined with Backlack , a special bonding varnish, or with traditional insulating varnishes. We also produce NO grades in an HS grade (high-strength) variation, which has especially high yield strength.

Impact of sheet thickness on core loss

Sheet thickness is a decisive factor when it comes to core loss in electrical steel strip. It has a disproportionate impact as frequency increases. The low nominal thickness of the NO grades (starting at 0.1 mm/ 0.004") guarantees minimal performance loss, resulting in significantly higher output at the same energy input.

acc. to EN 10303 Thin electrical steel strip for high and medium frequency ranges

For the standard grades in accordance with EN 10106, HS variations, such as M270-50A HS, are available upon request.


Thickness tolerances

Width tolerances

Steel Sheet tolerances

NO grade delivery types

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