M3 M4 M5 Silicon Steel
Sep 30, 2025
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M3 M4 M5 Silicon Steel Product Description
Silicon steel is used in transformer cores due to its unique magnetic properties. The presence of silicon in the steel increases its electrical resistivity and reduces the eddy current losses, making it an ideal material for transformer cores. The laminated structure of silicon steel also helps in minimizing eddy current losses, making it an efficient choice for transformer applications.
The properties of silicon steel make it an excellent choice for transformer cores, as it helps in reducing energy losses and improving the overall efficiency of the transformer. Therefore, selecting the right grade of silicon steel is crucial for ensuring optimal transformer performance.
Understanding the Different Grades of Silicon Steel
There are different grades of silicon steel available in the market, each with its unique set of properties and characteristics. The most commonly used grades of silicon steel for transformer cores are M3, M4, M5, and M6.
M3 grade silicon steel is the most commonly used grade for transformer cores. It has a high magnetic saturation and excellent permeability, making it suitable for low to medium voltage transformers. M4 grade silicon steel, on the other hand, has higher magnetic saturation and is ideal for medium to high voltage transformers.
M5 and M6 grades of silicon steel are used for high-frequency applications, such as inductors and chokes. These grades have lower core losses and are suitable for applications where high efficiency is crucial. Understanding the different grades of silicon steel is essential for selecting the right grade for transformer cores.
Factors to Consider When Selecting the Right Grade of Silicon Steel
When selecting the right grade of silicon steel for transformer cores, several factors need to be considered. These factors include the transformer's operating frequency, the magnitude of the magnetic field, the core loss, and the specific requirements of the application.
The operating frequency of the transformer is a crucial factor in determining the right grade of silicon steel. For low-frequency applications, such as power transformers, a grade with high magnetic saturation, such as M3 or M4, is preferred. For high-frequency applications, such as inductors and chokes, grades with lower core losses, such as M5 or M6, are more suitable.
The magnitude of the magnetic field also plays a significant role in selecting the right grade of silicon steel. Transformers operating at higher magnetic flux densities require grades with higher magnetic saturation to prevent saturation of the core. Understanding the specific requirements of the application and the operating conditions of the transformer is crucial for selecting the right grade of silicon steel.
electrical silicon steel specifications
| Type | Grade | Width | Max Core Loss@P1.7T/50Hz | Lamination Factor(%) | Min Induction@B800 |
| Common Type | 23Q110 | 900-1200mm | 1.10w/kg | 97.2 | 1.82T |
| 23Q120 | 1.20w/kg | 97.2 | 1.82T | ||
| 27Q120 | 1.20w/kg | 97.5 | 1.82T | ||
| 30G120 | 1.20w/kg | 98 | 1.82T | ||
| High Induction Type |
B20P085 | 900-1200mm | 0.85w/kg | 97 | 1.86T |
| B23P085 | 0.85w/kg | 97.2 | 1.88T | ||
| B23P090 | 0.90w/kg | 97.2 | 1.88T | ||
| B23P095 | 0.95w/kg | 97.2 | 1.88T | ||
| B23P100 | 1.00w/kg | 97.2 | 1.88T | ||
| B27P095 | 0.95w/kg | 97.5 | 1.89T | ||
| B27P100 | 1.00w/kg | 97.5 | 1.89T | ||
| B30P120 | 1.20w/kg | 98 | 1.89T | ||
| Domain Refined High Induction Type(Laser) |
B20R065 | 900-1200mm | 0.65w/kg | 97 | 1.86T |
| B23RK085 | 0.85w/kg | 97.2 | 1.88T | ||
| B27RK085 | 0.85w/kg | 97.5 | 1.89T |
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Gnee provides premium iron cores to the world. Our cores can be selected in a wide range of materials, shapes, applications, manufacturing techniques, etc., to meet customers' diverse demands. Explore our wide product range now~
Manufacturing Process
1. Raw Material Sourcing
2. Slitting
3. Punching
4. Laminating
5. Core Forming
6. testing
GNEE EC
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 18 years of success in the iron core industry;
National High-tech Enterprise & Famous Brand Enterprises in China;
200+
Over 200 employees;
The R&D team has more than 80 experienced engineers and the production team has more than 100 skilled staffs;
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Annual turnover up to 35 million dollor per year;
Owns many sets of highly automatic winding, annealing, and assembling machines;
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Over 1000 customers in domestic and overseas markets;
core Products are exported to more than 70 countries in the world;
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Transformer Applications
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With 18 Years of industry experience, we focus on the research, development, and manufacturing of high-quality iron cores for electricity, industrial control, new energy, and automotive markets