B27G120 B27G130 M4 Grain Oriented Electrical Steel for Transformers
1. INTRODUCTION: Oriented electrical steel, also known as cold-rolled oriented silicon steel, refers to cold-rolled electrical steel containing 2.9% to 3.5% Si, and the crystal structure of the steel plate has certain rules and directions. Oriented electrical steel is an indispensable soft magnetic material in the power industry, mainly used in transformers, rectifiers, reactors and large motors and other industries.
2. APPLICATION:
| Varieties |
Conventional type |
High induction type |
Domain refined high induction type |
| Large motors |
✶ |
✶ |
|
| Large transformers |
✶ |
✶ |
✶ |
| Medium and small transformers |
✶ |
✶ |
✶ |
| Distributing transformers |
✶ |
✶ |
|
| Voltage regulator |
✶ |
✶ |
|
| Reactor and magnetic amplifier |
✶ |
✶ |
✶ |
| IF transformer |
|
✶ |
|
| Mutual inductor |
✶ |
✶ |
|
| TV transformer |
✶ |
✶ |
|
| Radio transformer |
✶ |
✶ |
|
| Radio broadcast transformer |
|
✶ |
|
3.Standard dimensions of products:
| Available thickness (mm) |
Available width range (mm) |
Inside diameter (mm) |
| 0.23,0.27,0.30,0.35 |
900~1200 |
508 |
4.Dimensional and shape tolerances:
| Width (mm) |
Thickness (mm) |
Thickness tolerance (mm) |
Longitudinal thickness tolerance (mm) |
Traverse thickness tolerance (mm) |
Width tolerance (mm) |
Flatness (%) |
Camber within 2m (mm) |
| 900~1200 |
0.23 |
±0.02 |
≤0.03 |
≤0.02 |
0~+2 |
≤1.5 |
≤1.0 |
| 0.27 |
±0.03 |
| 0.30 |
| 0.35 |
5.Standard electromagnetic properties:
| Type |
Grade |
Thickness (mm) |
Density (kg/dm3) |
Max. Core loss (W/kg) |
Min. Induction (T) |
| Conventional G type |
B23G110 |
0.23 |
7.65 |
1.10 |
1.80 |
| B27G120 |
0.27 |
7.65 |
1.20 |
1.80 |
| B30G120 |
0.30 |
7.65 |
1.20 |
1.80 |
| B30G130 |
1.30 |
1.80 |
| B30G140 |
1.40 |
1.80 |
| B35G135 |
0.35 |
7.65 |
1.35 |
1.80 |
| B35G145 |
1.45 |
1.80 |
| B35G155 |
1.55 |
1.80 |
| High induction P type |
B23P085 |
0.23 |
7.65 |
0.85 |
1.87 |
| B23P090 |
0.90 |
1.87 |
| B23P095 |
0.95 |
1.87 |
| B27P090 |
0.27 |
7.65 |
0.90 |
1.88 |
| B27P095 |
0.95 |
1.88 |
| B27P100 |
1.00 |
1.88 |
| B30P095 |
0.30 |
7.65 |
0.95 |
1.88 |
| B30P100 |
1.00 |
1.88 |
| B30P105 |
1.05 |
1.88 |
| B30P120 |
1.20 |
1.88 |
| B35P115 |
0.35 |
7.65 |
1.15 |
1.88 |
| B35P125 |
1.25 |
1.88 |
| B35P135 |
1.35 |
1.88 |
| Domain refined high induction R type |
B23R080 |
0.23 |
7.65 |
0.80 |
1.87 |
| B23R085 |
0.85 |
1.87 |
| B23R090 |
0.90 |
1.87 |
| B27R085 |
0.27 |
7.65 |
0.80 |
1.87 |
| B27R090 |
0.85 |
1.87 |
| B27R095 |
0.90 |
1.87 |
Note: a. Detecting basis GB/T3655-2008(G type and P types),GB/ T13789-2008(R type b. G type and P type test specimens are sheared to the rolling direction and annealed for stress relieving c. P17/50 means core loss of sample per kg at max. magnetic induction 1.7T and frequency 50Hz; d. B8 means magnetic induction corresponding to 800A/m magnetic field intensity.
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