Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of cold rolled oriented silicon steel in China. Welcome to wholesale customized cold rolled oriented silicon steel at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.
The main use of cold-rolled oriented silicon steel strip is for transformer manufacturing, so it is also called cold-rolled transformer silicon steel. Compared with cold-rolled non-oriented silicon steel, oriented silicon steel has stronger magnetic directivity. It has excellent high permeability and low loss characteristics of easy magnetizing rolling direction. The iron loss in the rolling direction of the oriented steel strip is only 1/3 of the transverse, the permeability ratio is 6:1, the iron loss is about 1/2 of the hot rolled steel, and the magnetic permeability is 2.5 times of the latter.
The magnetic characteristics and technical characteristics Of the normal oriented electrical steel belt (sheet)
|
Nominal thickness （mm) |
Grade | Theoretical density （kg/dm³） |
Maximum iron loss P1.7/50（w/kg） |
Minimum magnetic induction J800（T） | Minimum stacking factor（%） |
|---|---|---|---|---|---|
| 0.23 | H23Q110 H23Q120 |
7.65 | 1.10 1.20 |
1.83 | 0.945 |
| 0.27 | H27Q120 H27Q130 |
1.20 1.30 |
0.950 | ||
| 0.30 | H30Q120 H30Q130 |
1.20 1.30 |
0.955 |
The magnetic characteristics and technical characteristics Of high permeability-oriented electrical steel belt (sheet)
| Nominal thickness （mm) |
Grade | Theoretical density （kg/dm³） |
Maximum iron loss P1.7/50（w/kg） |
Minimum magnetic induction J800（T） | Minimum stacking factor（%） |
|---|---|---|---|---|---|
| 0.23 | H23QG085 H23QG090 H23QG095 H23QG100 |
7.65 | 0.85 0.90 0.95 1.00 |
1.88 | 0.945 |
| 0.27 | H27QG090 H27QG095 H27QG100 H27QG110 |
7.65 | 0.90 0.95 1.00 1.10 |
1.88 | 0.950 |
| 0.30 | H30QG105 H30QG110 H30QG120 |
7.65 | 1.05 1.10 1.20 |
1.88 | 0.955 |
CRGO grade steel mainly finds applications as core material for power transformers and distribution transformers. This can be explained as below:
High magnetic permeability leads to low excitation currents and lower inductions.
Low hysteresis and eddy current losses.
Excellent lamination factor leads to better and compact designs and hence low material required.
High knee saturation characteristics.
Very low level of magnetostriction leads to noise reduction.
Enhances ease of winding and improves productivity.
Future Scope of CRGO Silicon Steel:
While there have been alternatives to the CRGO grades of steel such as nickel-iron, mu-metal, amorphous boron strip, superglass etc still CRGO steel is the superior choice in the transformer industry. Alloys like the amorphous metal Fe78-B13-Si9 has shown to have much lesser core losses when used as the core of distribution transformer as compared to the CRGO grade steel. An optimum constituent of silicon addition in steel can change the texture so as to achieve desirable magnetic properties when manufactured under controlled conditions.
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