Grain-oriented electrical steel usually has a silicon level of 3% (Si:11Fe). It is processed in such a way that the optimal properties are developed in the rolling direction, due to a tight control (proposed by Norman P. Goss) 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, cold-rolled grain-oriented steel is often abbreviated to CRGO.
Standard size range of product
Nominal Thickness (mm) | Nominal Width(mm) | Inner Diameter (mm) |
0.23, 0.27, 0.30, 0.35 | 650-1200 | 508 |
Deviation of the Width, Thickness and length
Nominal width | Nominal thickness | Thickness deviation | Transversal Thickness deviation | Width deviation | Width tolearance | Waviness % |
≤650 800-1000 ≤1200 | 0.23, 0.27, 0.30, 0.35 | 0.23:±0.020 0.25:±0.025 0.30:±0.025 Other thickness ±0.030 |
≤0.020 ≤0.025 |
≤0.015 |
0–1 |
≤1.5 |
Product Specification, Delivery weight and executive standard
Product Specification | Delivery Weight | Executive Standard |
Thickness 0.23/0.27/0.39 * Coil | Products delivery upon coil coil weight ≤2-3 ton | GB/T 2521.2-2016 |