NO grades
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 thickness 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 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.
Application examples for NO grades
Further applications
Request electrical steel strip sample
Are you interested in testing the performance of our electrical steel strip for yourself, including the available coating systems? We offer samples of our entire range of materials for initial testing purposes. You can request your own personalized sample by clicking the button on the right and specifying the desired grade, coating type, and layer thickness.
Unit system
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 DIN EN 10303Thin electrical steel strip for high and medium frequency ranges
Unit system
| Grade1) | Nominal thickness |
Max. core loss | Min. mechanical properties | Thickness tolerance | ||||
| in mm | 1.0 T / 400 Hz in W/kg |
1.0 T / 700 Hz in W/kg |
1.0 T / 1000 Hz in W/kg |
Yield strength in MPa |
Tensile strength in MPa |
A80 in % |
in mm |
|
| NO 10 | 0.10 | 13 | 25 | 39 | 330 | 450 | 12 | +/- 0.01 |
| NO 15 | 0.15 | 14 | 25 | 43 | 330 | 450 | 12 | +/- 0.02 |
| NO 20-13 | 0.20 | 13 | 29 | 48 | 420 | 500 | 10 | +/- 0.02 |
| NO 20-15 | 0.20 | 15 | 32 | 55 | 330 | 450 | 13 | +/- 0.02 |
| NO 25-14 | 0.25 | 14 | 34 | 62 | 420 | 500 | 12 | +/- 0.02 |
| NO 25-17 | 0.25 | 17 | 40 | 67 | 330 | 450 | 13 | +/- 0.02 |
| NO 27-15 | 0.27 | 15 | 37 | 68 | 420 | 500 | 12 | +/- 0.02 |
| NO 27-18 | 0.27 | 18 | 42 | 70 | 330 | 450 | 13 | +/- 0.02 |
| NO 30-16 | 0.30 | 16 | 41 | 71 | 420 | 500 | 12 | +/- 0.02 |
| NO 30-19 | 0.30 | 19 | 45 | 75 | 330 | 450 | 13 | +/- 0.02 |
| NO 35-19 | 0.35 | 19 | 43 | 77 | 420 | 500 | 12 | +/- 0.02 |
| NO 35-22 | 0.35 | 22 | 48 | 85 | 330 | 450 | 13 | +/- 0.02 |
| max. width: 1.000 mm 1) Adjustments to magnetic and mechanical properties possible after consultation. | ||||||||
Thickness tolerances
Unit system
| Thickness | ||||
| Nominal thickness | in mm | 0.1 | 0.15 - 0.30 | 0.35 |
| Deviation from nominal thickness | in mm | +/-0.01 | +/- 0.02 | +/- 0.03 |
| Thickness deviation over strip width (measurement 30 mm from edge) | in mm | +/- 0.01 | +/- 0.015 | +/- 0.02 |
| Special thicknesses and special tolerances upon request | ||||
Width tolerances
Unit system
| Width | ||||
| Nominal width | in mm | ≤ 150 | ≥ 150 / ≤ 300 | > 500 / ≤ 1000 |
| Deviation from nominal width | in mm | + 0.2 | + 0.3 | + 1.5 |
| - 0 | - 0 | - 0 | ||
Steel Sheet tolerances
Einheitensystem
| Length | ||
| Deviation from sheet length | in % | + 0.5 / -0 of the nominal value (max. 6 mm) |
NO grade delivery types
Unit system
| Pancake Coil | ||
| Width | in mm | 20 - 1,000 |
| Coil weight | in kg/mm strip width | max. 20 |
| Inner diameter | in mm | 508 |
| Oscillate wound coils | ||
| Strip width | in mm | 7 - 70 |
| Coil weight | in kg | max. 3,500 |
| Coil width | in mm | 250 - 550 |
| Inner diameter | in mm | 400 |
| Cut-to-length sheets | ||
| Width of sheets | in mm | 400 - 1,000 |
| Length of sheets | in mm | 400 - 2,500 |