Why 0.2mm Silicon Steel Stamping is More Expensive?

Silicon steel, also known as electrical steel, plays an indispensable role in the world of electrical and electronic applications. However, the thickness of silicon steel can vary, and in this article, we’ll delve into why 0.2mm silicon steel stamping is associated with a higher cost compared to thicker variants.

What is Silicon Steel?

Silicon steel, is also known as electrical steel or lamination steel. The silicon content is usually between 0.5% and 6.5%, and the carbon content is less than 0.08%. Silicon steel has the characteristics of high magnetic permeability, low coercivity, and large resistivity, which makes silicon steel have excellent properties in magnetic materials, such as low hysteresis loss and eddy current loss. It’s predominantly used in the cores of transformers, generators, and electric motors.

electrical steel

0.2mm vs. Standard Thickness

When comparing 0.2mm silicon steel to standard thicknesses (typically in the range of 0.35mm to 0.5mm), several critical factors come into play.

The first and perhaps most apparent distinction is the material cost. Thinner silicon steel sheets, like the 0.2mm variant, tend to be more expensive due to their relative scarcity and the need for precision manufacturing. The raw silicon steel material of 0.2mm is 1.7 times 0.35mm.

The reduction in thickness introduces deformation issues. 0.2mm silicon steel is very easy to deform during the punching and stamping process, so this mold design has a very high requirement. Not every supplier can laminate 0.2mm silicon steel perfectly(almost all China suppliers can laminate 0.5mm silicon steel).

So the mold cost is higher than a 0.5mm mold accordingly. We will use the best quality Tungsten Steel to ensure the mold life span and tolerance.

Manufacturing Process of 0.2mm Silicon Steel

The manufacturing of 0.2mm silicon steel is a complex and precision-driven process. The reduction in thickness requires greater care and precision during the stamping and annealing stages.

During the stamping phase, a continuous strip of silicon steel passes through a high-speed press. The press employs a series of progressive and compound dies to precisely cut and shape the silicon steel into the desired form, ensuring it maintains its magnetic properties.

Why 0.2mm Silicon Steel Stamping is More Expensive

Material Scarcity

Silicon steel, particularly in thinner gauges, is not as readily available as its thicker counterparts. This scarcity naturally drives up the price.

Precision and Expertise

Achieving the required thickness while maintaining the unique magnetic properties of silicon steel demands advanced manufacturing techniques and highly skilled personnel, contributing to increased labor and equipment costs.

Wastage Reduction

The thinner the steel, the less margin for error in the manufacturing process. To minimize wastage, manufacturers must invest in higher precision machinery and quality control measures, adding to overall production costs.

Increased Core Loss Reduction

One of the primary benefits of 0.2mm silicon steel is its reduced core loss, enhancing the energy efficiency of electrical devices. However, achieving this lower core loss comes at an additional cost during production.

Applications Industries

silicon steel application

Electric Motors

0.2mm silicon steel is used in the construction of stators and rotors. Its properties help reduce eddy current losses, thereby improving the motor’s electrical efficiency and performance.

Electrical Transformers

One of the primary uses of 0.2mm silicon steel is in transformers, both power and high-frequency transformers. The low core loss and high permeability of silicon steel improve the efficiency of transformers, reducing energy wastage and enhancing performance.


0.2mm silicon steel is also employed in generators to enhance electrical performance. The efficient magnetic properties of the steel contribute to better power generation with reduced heat loss.

Renewable Energy

The renewable energy sector benefits from thinner silicon steel in power generation and distribution systems, improving energy conversion.

Advantages of 0.2mm Silicon Steel

High Magnetic Permeability

0.2mm silicon steel has very high magnetic permeability, enabling it to support significant magnetic flux densities.

Low Core Losses

One of the most significant advantages of 0.2mm silicon steel is its ability to minimize core losses, which include both hysteresis and eddy current losses.

Reduces Size and Weight

Its high efficiency allows for the design of smaller and lighter electrical devices.

Improved Energy Efficiency:

The low power loss characteristics of silicon steel help in improving the energy efficiency of devices it’s used in.

High Saturation Magnetic Flux Density

Silicon steel can handle a high level of magnetic flux before reaching saturation.

Motorneo for high-efficiency silicon steel for your motor laminations

Motorneo offers electrical steel ranges from 0.1mm to 1mm in thickness, ensuring precision and high quality in every core we manufacture.

Our factory has 25ton-300ton stamping machines (such as compound die stamping, rotary notching, and progressive die stamping ) and stamping dies, ensuring that every motor stator and rotor iron core we produce adheres to the highest quality standards.

We offer riveting, cleating, gluing, laser welding, TIG + MIG welding, and the self-bonding process for stack and bond laminations. From lamination prototypes to mass production runs, we have the equipment and experience to meet your needs efficiently and with precision.

manufacturing motor iron core


The cost of 0.2mm silicon steel stamping is justified by its numerous advantages, primarily its improved energy efficiency, space-saving attributes, and performance enhancements.

While it may come at a higher cost, the value it brings to industries such as transformers, generators, and electric motors is undeniable. As technology and manufacturing techniques advance, the future of 0.2mm silicon steel may hold even more promising possibilities for energy-efficient and space-saving solutions.


What are the types of silicon steel sheets?

Silicon steel sheets, also known as electrical steel or laminations, come in several types, each designed for specific applications:

Grain-Oriented (GO) Silicon Steel: This type of silicon steel is processed in a way that aligns the grain structure to follow a preferred direction. It is primarily used in transformers, where it provides high magnetic permeability and low core loss in the direction of the grain orientation.

Non-Grain Oriented (NGO) Silicon Steel: Unlike grain oriented silicon steel, NGO silicon steel does not have a preferred grain direction. It is used in a wide range of electrical applications, including motors, generators, and small transformers.

Hi-B Silicon Steel: This type of silicon steel has a higher silicon content, which increases its magnetic induction and permeability. Hi-B silicon steel is often used in high-efficiency transformers and reactors.

Grain-Non Oriented Silicon Steel: This is a relatively new type of silicon steel that combines characteristics of both grain-oriented and non-grain-oriented steel. It offers improved magnetic properties and is suitable for various applications, including transformers and motors.

Why does the thickness of silicon steel matter, and how does it affect its performance?

The thickness of silicon steel is critical as it directly influences its performance in electrical applications. Thinner silicon steel, such as 0.2mm sheets, results in reduced core loss and improved energy efficiency, making it an ideal choice for devices where efficient energy conversion is paramount, as it minimizes energy dissipation.

What are the key properties that make silicon steel ideal for electrical applications?

Silicon steel’s key characteristics include high magnetic permeability, low core loss, and high electrical resistivity.

High magnetic permeability allows it to efficiently conduct and amplify magnetic fields, making it valuable for transformers and motors. Its low core loss means it dissipates minimal energy as heat during magnetic cycles, leading to increased energy efficiency in electrical devices.

Its high electrical resistivity reduces the flow of eddy currents, further minimizing energy losses. These combined properties make silicon steel an essential choice in applications where precise energy conversion and minimal energy wastage are crucial.

Try to contact us for high-quality motor cores in China.