cold rolled non oriented transformer core steel
Sep 29, 2025
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cold rolled non oriented transformer core steel Product Description
Cold-rolled non-oriented (CRNGO) electrical steel is a silicon-iron alloy that is cold-rolled to create a magnetic core with randomly oriented grains, resulting in consistent magnetic properties in all directions. Unlike grain-oriented steel, CRNGO is used in electrical components like motors and generators where the magnetic field changes direction, providing excellent mechanical and magnetic performance.
GNEE provides silicon steel in different categories in order to meet different needs. Generally there are 4 series of non grain oriented electrical steel: general series, high efficient series, stress relief annealing series and new energy vehicle series.
CRNGO electrical steel Key Characteristics
- Composition:
A ferrosilicon alloy with very low carbon content and 1.5% to 3.0% silicon.
- Grain Structure:
Grains are randomly distributed after annealing, providing uniform magnetic properties in any direction.
- Production:
Produced by cold rolling and annealing to reduce thickness and achieve final grain structure and magnetic properties.
CRNGO electrical steel Applications
Motors and Generators:
Its isotropic (uniform in all directions) magnetic properties make it ideal for the rotating cores of motors and generators.
Small Transformers:
Used in smaller transformers and other electrical equipment where the magnetic field changes direction.
CRNGO electrical steel Advantages
- Uniform Magnetic Properties:
Offers consistent magnetic performance regardless of the direction of the magnetic field.
- Good Mechanical Properties:
The cold-rolling process produces sheets with smooth surfaces, consistent thickness, and good flatness, which improves core fill factor.
- Improved Magnetic Performance:
Adding silicon increases electrical resistivity and maximum permeability, while reducing coercivity and core loss (iron loss).
- Reduced Strain Sensitivity:
CRNGO steel is less sensitive to the strain that can occur during stamping and processing compared to grain-oriented steel.
Electrical Silicon Steel specifications
Product Series
|
Product series |
Main specification |
Features |
|
General series |
0.35mm 0.50mm 0.65mm |
Similar excellent product performance benchmarking with leading companies at home and abroad |
|
High efficient series |
0.35mm 0.50mm |
Lower core loss and higher magnetic induction than concentional products |
|
Stress relief annealing series |
0.35mm 0.50mm |
Low core loss, high magnetic induction and good machinablity after annealing |
|
New energy vehicle series |
0.35mm 0.30mm 0.27mm 0.20mm |
Excellent electromagnetic performance under high frequancy |
Product Introduction
|
Major Manufacturer |
BAOSTEEL, SHOU STEEL |
|
Nominal thickness |
0.18mm, 0.20mm, 0.27mm, 0.30mm,0.35mm, 0.50mm |
|
Coil ID |
508mm |
|
Weight |
2MT~8MT |
|
Standard |
EN 10106,IEC 60404-8-4,ASTM,DIN,GB,JIS |
|
Form |
Cold Rolled Strip |
|
Delivery Lead Time |
7~15 days after T/T prepayment or L/C date |
|
Packing |
Standard export seaworthy packing |
|
Application |
All kinds of transformers, reactor, filter, inverter |
Standard Value of Electromagnetic Property (for reference)
General series Grade Table
|
Grade |
Nominal Thickness(mm) |
Theoretical Density(kg/dm³) |
Core Loss(W/kg) |
Magnetic Induction(T) |
|
P15/50 |
B50 |
|||
|
35SW230 |
0.35 |
7.60 |
2.15 |
1.65 |
|
35SW250 |
7.60 |
2.35 |
1.65 |
|
|
35SW270 |
7.60 |
2.45 |
1.66 |
|
|
35SW300 |
7.65 |
2.55 |
1.68 |
|
|
35SW360 |
7.65 |
2.70 |
1.70 |
|
|
35SW440 |
7.70 |
2.80 |
1.71 |
|
|
35SW550 |
7.75 |
2.90 |
1.72 |
|
|
50SW250 |
0.50 |
7.60 |
2.35 |
1.65 |
|
50SW270 |
7.60 |
2.50 |
1.66 |
|
|
50SW290 |
7.60 |
2.65 |
1.66 |
|
|
50SW310 |
7.65 |
2.80 |
1.69 |
|
|
50SW350 |
7.65 |
2.90 |
1.69 |
|
|
50SW400 |
7.65 |
3.00 |
1.69 |
|
|
50SW470 |
7.75 |
3.60 |
1.69 |
|
|
50SW600 |
7.75 |
3.70 |
1.70 |
|
|
50SW700 |
7.80 |
4.40 |
1.72 |
|
|
50SW800 |
7.80 |
4.60 |
1.73 |
|
|
50SW1000 |
7.85 |
5.30 |
1.76 |
|
|
50SW1300 |
7.85 |
5.60 |
1.76 |
|
|
65SW600 |
0.65 |
7.75 |
4.55 |
1.70 |
|
65SW800 |
7.80 |
5.60 |
1.72 |
|
|
65SW1000 |
7.85 |
6.00 |
1.74 |
|
|
65SW1300 |
7.85 |
6.50 |
1.76 |
High Efficient Series
|
Grade |
Nominal Thickness (mm) |
Theoretical Density (kg/dm³) |
Core Loss (W/kg) |
Magnetic Induction (T) |
|
P15/50 |
B50 |
|||
|
35SWH250 |
0.35 |
7.65 |
2.40 |
1.69 |
|
50SWH470 |
0.50 |
7.70 |
3.05 |
1.72 |
|
50SWG470 |
0.50 |
7.75 |
3.15 |
1.73 |
|
50SWH600 |
0.50 |
7.75 |
3.60 |
1.74 |
|
50SWH800 |
0.50 |
7.80 |
4.50 |
1.76 |
|
50SWH1300 |
0.50 |
7.85 |
5.60 |
1.78 |
Stress Relief Annealing Series
|
Grade |
Nominal Thickness (mm) |
Theoretical Density (kg/dm³) |
Core Loss (W/kg) |
Magnetic Induction (T) |
|
P15/50 |
B50 |
|||
|
35SWR300 |
0.35 |
7.80 |
2.8 |
1.75 |
|
35SWR350 |
0.50 |
7.80 |
3.2 |
1.76 |
|
35SWR450 |
0.50 |
7.85 |
4.2 |
1.74 |
Note:
a.The Above Measurement is according to GB/T2521.1-2016.
b.The number of the transverse and vertical test samples are the same.
c.The magnetic properties of stress relief annealing products are only for tested at 750°C with 2 hours annealing.
d.P15/50 is the core loss with 1.5T and 50Hz. P10/400 is the core loss with 1.0T and 400Hz
e.B50 is the magnetic induction with 5000A/m.
New Energy Vehicle Series
|
Grade |
Nominal Thickness (mm) |
Theoretical Density (kg/dm³) |
Core Loss (W/kg) |
|
P15/50 |
|||
|
20SW1200 |
0.20 |
7.65 |
11.0 |
|
20SW1500 |
0.20 |
7.65 |
12.5 |
|
27SW1500 |
0.27 |
7.60 |
13.8 |
|
30SW1600 |
0.30 |
7.60 |
14.5 |
|
35SW1700 |
0.35 |
7.60 |
16.0 |
|
35SW1900 |
0.35 |
7.65 |
17.5 |
|
25SWH1400 |
0.25 |
7.65 |
13.0 |
|
27SWH1400 |
0.27 |
7.65 |
13.2 |
|
30SWH1500 |
0.30 |
7.65 |
14.0 |
|
35SWH1900 |
0.35 |
7.65 |
17.0 |
|
35SWYS600 |
0.35 |
7.65 |
35.5 |
|
Note: |
a.Measurement is according to GB/T2521.1-2016. b.The number of the transverse and vertical test samples are the same. c.The magnetic properties of stress relief annealing products are only for tested at 750°C with 2 hours annealing. d.P15/50 is the core loss with 1.5T and 50Hz. P10/400 is the core loss with 1.0T and 400Hz e.B50 is the magnetic induction with 5000A/m. |
||
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Founded in 2008 and located in Anyang in China, Gnee Electric is a high-tech enterprise specializing in researching and manufacturing iron core products.
The company currently occupies over 20,000 square meters and employs more than 200 people, including over 80 professionals. After more than 18 years of development, we have built our own magnetic material production base and independently develope, produce, and sell various kinds of iron cores. The common types include silicon steel cores, motor cores, transformer cores, toroidal iron cores, special-shaped cores, custom cores, and others. Our cores are widely applied in different sectors including transformers, motors, mutual inductors, voltage stabilizers, welding machines, magnetic amplifiers, and instrumentation, providing diverse core solutions to global customers.
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GNEE EC was founded in 2008, which is a National High-tech Enterprise & Famous Brand Enterprise in China, developing into a professional manufacturer and supplier of high-quality iron cores.
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Over 200 employees;
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