Dimensional tolerances in electrical steels are applied according to EN 10106 standard.
Thickness Tolerance: ± 8% of thickness for 0.35 and 0.50 mm, ± 6% of thickness for 0.65 mm and 1.00 mm. The thickness difference across the width is max. 0.02 mm for thicknesses of 0.50 mm and below and max. 0.03 mm for thicknesses of 0.65 mm and above.
Measurements are made min. 30 mm from the edge and are only applicable for widths over 150 mm.
| Thickness (mm) | Change in thickness along the coil in the rolling direction | Change in thickness along the width |
|---|---|---|
| 0,35 | ± %8 | 0,020 |
| 0,50 | ± %8 | 0,020 |
| 0,65 | ± %6 | 0,030 |
| 1,00 | ± %6 | 0,030 |
Length tolerance: 0.5% of the sheet length, maximum 6 mm.
Width tolerance: it is -0/+20 mm for products without edge cuts. For products with cut or sitted edges, the table below is valid and can be applied in + or - direction.
| Strip Width (mm) | Tolerance (mm) |
|---|---|
| ≤ 150 | +0,2 |
| 151 - 300 | +0,3 |
| 301 - 600 | +0,5 |
| 601 - 1000 | +1 |
| 1001 - 1250 | +1,5 |
Electrical steels can be produced as slitted or trimmed edge (SL), mill edge (ME), cut-to-length (CL) products within the following production limits.