Non Oriented Silicon Steel (NO Si Steel) is a crucial material in the electrical industry, widely used in motors, generators, and transformers. As a supplier of Non Oriented Silicon Steel, I’ve had the privilege of working with various grades of this material, each with its unique characteristics and applications. In this blog, I’ll delve into the different grades of Non Oriented Silicon Steel and explore their distinct features. Non Oriented Silicon Steel

Understanding Non Oriented Silicon Steel
Non Oriented Silicon Steel is an iron – silicon alloy with silicon content typically ranging from 0.5% to 6.5%. The addition of silicon improves the electrical resistivity of the steel, reducing eddy current losses and enhancing the efficiency of electrical devices. Unlike Grain Oriented Silicon Steel, which has a preferred crystal orientation for high – performance in a specific direction, Non Oriented Silicon Steel has a random crystal orientation, making it suitable for applications where magnetic properties are required in multiple directions.
Common Grades of Non Oriented Silicon Steel and Their Characteristics
Low – Grade Non Oriented Silicon Steel (e.g., M500 – 65A)
Low – grade Non Oriented Silicon Steel is characterized by relatively high silicon content and lower magnetic properties compared to higher – grade materials. These grades are often used in applications where cost is a significant factor and high – efficiency is not the primary concern.
- Magnetic Properties: Low – grade NO Si Steel has lower magnetic flux density and higher core losses. The magnetic flux density (B) is typically in the range of 1.5 – 1.7 T (tesla) at a magnetic field strength (H) of 5000 A/m. The core losses, which are the energy dissipated as heat during the magnetization and demagnetization process, are relatively high, usually around 5 – 6 W/kg at 50 Hz and 1.5 T.
- Applications: This grade is commonly used in small – scale motors, such as those found in household appliances like fans, vacuum cleaners, and power tools. The lower cost of these materials makes them an attractive option for mass – produced consumer products.
Medium – Grade Non Oriented Silicon Steel (e.g., M350 – 50A)
Medium – grade Non Oriented Silicon Steel offers a balance between cost and performance. It has better magnetic properties than low – grade materials and is suitable for a wide range of applications.
- Magnetic Properties: The magnetic flux density of medium – grade NO Si Steel is typically in the range of 1.6 – 1.8 T at 5000 A/m. The core losses are lower than those of low – grade materials, usually around 3 – 4 W/kg at 50 Hz and 1.5 T.
- Applications: This grade is widely used in industrial motors, small – to – medium – sized generators, and some electrical transformers. The improved magnetic properties allow for more efficient operation of these devices, reducing energy consumption and heat generation.
High – Grade Non Oriented Silicon Steel (e.g., M235 – 35A)
High – grade Non Oriented Silicon Steel is designed for applications where high efficiency and low core losses are critical. These grades are often used in high – performance motors and generators.
- Magnetic Properties: High – grade NO Si Steel has a high magnetic flux density, typically in the range of 1.7 – 1.9 T at 5000 A/m. The core losses are significantly lower than those of lower – grade materials, usually around 2 – 3 W/kg at 50 Hz and 1.5 T.
- Applications: This grade is commonly used in electric vehicles, high – speed motors, and large – scale power generators. The low core losses result in reduced energy consumption and improved overall efficiency, making it ideal for applications where energy savings are a priority.
Factors Affecting the Performance of Non Oriented Silicon Steel
Several factors can affect the performance of Non Oriented Silicon Steel, including silicon content, grain size, and manufacturing processes.
- Silicon Content: As mentioned earlier, the silicon content in Non Oriented Silicon Steel plays a crucial role in determining its electrical and magnetic properties. Higher silicon content generally leads to higher electrical resistivity and lower core losses, but it also reduces the magnetic flux density. Therefore, the silicon content needs to be carefully balanced to achieve the desired performance.
- Grain Size: The grain size of the steel also affects its magnetic properties. Smaller grain sizes typically result in lower core losses and higher magnetic permeability. Manufacturers can control the grain size through heat treatment and rolling processes.
- Manufacturing Processes: The manufacturing processes, such as hot rolling, cold rolling, and annealing, can significantly impact the quality and performance of Non Oriented Silicon Steel. Proper control of these processes is essential to ensure consistent magnetic properties and dimensional accuracy.
Our Offerings as a Supplier

As a supplier of Non Oriented Silicon Steel, we offer a wide range of grades to meet the diverse needs of our customers. Our products are manufactured using state – of – the – art technology and strict quality control measures to ensure high – performance and reliability.
- Customization: We understand that different applications may require specific grades and properties of Non Oriented Silicon Steel. Therefore, we offer customization services to meet the unique requirements of our customers. Whether you need a specific silicon content, thickness, or surface finish, we can work with you to develop the right product.
- Quality Assurance: Our products are subject to rigorous quality testing to ensure compliance with international standards. We use advanced testing equipment and techniques to measure the magnetic properties, electrical resistivity, and other key parameters of our Non Oriented Silicon Steel.
- Technical Support: Our team of experienced engineers and technicians is available to provide technical support and advice to our customers. We can help you select the right grade of Non Oriented Silicon Steel for your application and provide guidance on installation and maintenance.
Conclusion
Pipeline Steel Plate Non Oriented Silicon Steel is a versatile and essential material in the electrical industry. The different grades of Non Oriented Silicon Steel offer a range of magnetic properties and performance characteristics, making them suitable for a wide variety of applications. As a supplier, we are committed to providing high – quality products and excellent customer service. If you are interested in purchasing Non Oriented Silicon Steel for your project, we encourage you to contact us to discuss your requirements. Our team will be happy to assist you in finding the right solution for your needs.
References
- "Magnetic Materials and Their Applications" by David Jiles.
- "Electrical Steel: Properties and Applications" by K. J. Strnat.
- Industry reports on Non Oriented Silicon Steel from market research firms.
Gnee Steel (tianjin) Co., Ltd
We’re professional non oriented silicon steel manufacturers in China, specialized in providing high quality products and service. We warmly welcome you to wholesale non oriented silicon steel at competitive price from our factory. Contact us for more details.
Address: No.4-1114, Beichen Building, Beicang Town, Beichen District, Tianjin, China
E-mail: info@gneesteels.com
WebSite: https://www.chinasteelplates.com/