We shall take the following two factors into consideration when selecting steel, the one is the machinability of the steel, the other is the vervice character during the processing, we hope the steel has a low strength and high elongation, which make ti easy to cut, stamp or form. But in the service of steel, we hope it has high strength, good impact performance to suffer extreme service condition. For these two reasons, we should select suitable steel form its mechanical properties.  Main Mechanical Properties Include Yield Strength  The yield strength or yield point of a material is defined in engineering and materias science as the stress at which a material begins to deform plastically. Prior to the yield point the material will deform elastically and will return to its orignal shape whem the applied stress is removed. Once the yield point is passed some fraction of the deformation will be permanent  and non-reversible.  Tensile Strength Tensile strength is indicated by the maximum stress before the break of specimen. In general, it indicates when necking will occur.  Elongation  Elongation , or percent elongation at break, is defined as  the change in gauge length after break per unit of the original gauge length. A high enlongation means the material can stand great permanet deformation before break, or high deformability.   The parameter yield strength, tensile strength, enlongation are measured by tensile test.  Impact Energy Impact energy, or toughness, is determined by the energy absorbed by the specimen during fracture in the impact test. It is measured in units of joules. Impact energy indicates material's resistance to impact load. It is tested by charpy V-notch test.  If welding is required during the process, we should consider the welding performance of the steel.  Welding  For the steel, welding is a fabrication to combine different pieces of steel together. In the welding, normally the binding sites melt together and cool to form a strong joint, such as electric arc welding, gas welding and electric resistance welding.  Weldability Weldability, also known as joinablility, of a material refiers to its alibityy to be welded. Most steels can be welded,but some are easier to weld than others. It greatly influences weld quality and is an important factor in choosing which welding process to use.   

Axial cores are a special type of core used in motors or transformers, the raw material is usually silicon steel, characterized by magnetic flux (magnetic field) primarily distributed along the rotational axis or axial direction of the device. This contrasts sharply with common radial cores (where magnetic flux is distributed radially). Compared to traditional silicon steel, the application of ultra-thin silicon steel in axial cores does indeed bring a series of significant advantages, mainly due to the improvement in its physical and electromagnetic properties. The application of ultra-thin silicon steel in axial cores is one of the key technologies for achieving high-frequency, high-efficiency, and miniaturized motors and transformers. Advantages: 1. In terms of electromagnetic performance, ultra-thin silicon steel is applied to the axial core. Due to the extremely thin thickness of ultra-thin silicon steel, the eddy current flow path is restricted, and the loop resistance is increased. Moreover, ultra-thin silicon steel itself has a low iron loss value, which can significantly reduce iron loss (especially eddy current loss) compared with traditional silicon steel, and improve the efficiency of motors/transformers. 2. In terms of structural design, axial cores made of ultra-thin silicon steel generally use self-bonding technology. Self-bonding technology uses special adhesives to solidify the silicon steel sheets as a whole, avoiding the damage to the material caused by traditional riveting/welding. 3. In terms of thermal management, the axial core made of ultra-thin silicon steel uses self-adhesive technology, and the self-adhesive coating fills the gaps between the sheets, forming an efficient axial heat conduction path; while the low iron loss characteristics of ultra-thin silicon steel can reduce heat generation from the source. In summary, ultra-thin silicon steel, applied to axial cores through special material processing and structural design, offers significant advantages in reducing high-frequency losses, increasing power density, optimizing heat dissipation, and improving NVH performance. This makes it highly suitable for the stringent requirements of high-efficiency, compact size, and high performance in current high-end motors and transformers.

Silicon steel is extremely important, it is not only a cornerstone material for the modern power and electronics industries, but is also hailed as an "artwork" and a "jewel in the crown" among steel products.With technological advancements and the demands of industrial development, silicon steel has gradually moved towards ultra-thin designs. Ultra-thin silicon steel with a thickness between 0.1 mm and 0.2 mm is an indispensable core material for many cutting-edge high-end equipment. Its value mainly stems from a key physical property: the eddy current loss of silicon steel sheets is proportional to the square of their thickness. This means that when the thickness is reduced from the conventional 0.35 mm or 0.5 mm to 0.1 mm, the eddy current loss can be significantly reduced to 1/25 or even lower, thereby greatly improves the energy conversion efficiency and high-frequency performance of motors made from CRNGO materials.Application fields: 1. New energy vehicle drive motors: The high efficiency of ultra-thin silicon steel enables new energy vehicle motors to extend their driving range, and its high power density can further reduce the size of the motor. Extremely low iron losses also result in higher energy efficiency, supporting ultra-high motor speeds (such as 31,000 rpm), thereby increasing power density. 2. Humanoid robot joint motors: Humanoid robot joint motors require miniaturization, lightweight, high precision, and fast response. The ultrathin thickness of ultra-thin silicon steel meets the stringent requirements of micro joint motors such as hollow cups and frameless torque motors in tiny spaces; moreover, its high magnetic induction ensures strong and precise power output. 3. Drones/eVTOL: This type of motor needs to operate at extremely high speeds (medium-high frequencies, such as 400-1000Hz) and requires extremely light weight. The excellent iron loss characteristics of ultra-thin silicon steel at medium-high frequencies ensure that the motor maintains low loss and high efficiency at high speeds, directly improving the aircraft's endurance and maneuverability; The level of research and development and industrialization of ultra-thin silicon steel is becoming an important indicator of a country's competitiveness in high-end manufacturing and emerging industries. Today, Shunge Steel can provide manufacturers in high-end manufacturing and emerging industries with solutions for ultra-thin silicon steel materials, and can also provide ultra-thin silicon steel in various thicknesses. Welcome to inquire and learn more.

Ultra-thin silicon steel (with a thickness between 0.1 mm and 0.2 mm) is one of the core materials for current motor technology innovation. Its core advantage lies in achieving a "double" increase in motor energy efficiency, power density, and overall performance through "thinning" of the physical thickness. • Improve energy efficiency and reduce iron losses. In motors, silicon steel sheets generate eddy currents due to electromagnetic induction, causing energy to be lost as heat; this loss is called iron loss. Ultra-thin silicon steel sheets can effectively limit the generation path of eddy currents, thereby significantly reducing iron losses. •Achieving Miniaturization and Lightweighting Ultra-thin silicon steel directly leads to the miniaturization and light weighting of both the material itself and the final application products. Higher Power Output in the Same Volume: For applications highly sensitive to space and weight, such as drones, humanoid robots, and low-altitude aircraft, using 0.1 mm or 0.2 mm ultra-thin silicon steel allows motors to output higher power in the same volume, or to make the motor smaller and lighter while maintaining power. This is crucial for improving equipment mobility and endurance, meeting the demands of high-end applications. •Core Advantages of Ultra-thin Silicon Steel in Different Application Scenarios New Energy Vehicle Drive Motors: Its core advantage lies in low iron loss, improving motor efficiency, extending vehicle range, and making energy utilization more efficient. Drone/eVTOL Motors: The core advantage of ultra-thin silicon steel lies in its excellent high-frequency performance, supporting miniaturization and light weighting, increasing motor speed and power density, and providing devices with better maneuverability and longer flight time. Humanoid Robot Joint Motors: The core advantage of ultra-thin silicon steel in this area is its high magnetic induction and low iron loss, supporting precision control and miniaturization, providing the power foundation for precise movements of joints such as dexterous hands and waists, and contributing to improved motion performance. Shunge Steel can now provide you with ultra-thin silicon steel in various specifications with thicknesses ranging from 0.1 to 0.2 mm. Welcome to inquire.

The pursuit of "ultra-thin" silicon steel is driven by the core objective of achieving higher energy efficiency, meeting the demands of high-frequency applications, and promoting the miniaturization and lightweighting of equipment.   The fundamental advantage of the "ultra-thin silicon steel" design lies in the principles of physics. In an alternating magnetic field, eddy currents are generated inside the silicon steel sheet, causing energy to be lost as heat (eddy current loss). Thinner silicon steel sheets confine eddy currents to a narrower vertical cross-section, effectively increasing the resistance of the eddy current path and thus suppressing eddy current loss. Therefore, the higher the operating frequency, the thinner the silicon steel sheet needs to be.     However, the pursuit of "ultra-thin silicon steel" also comes with enormous technological challenges. Reducing thickness means an exponential increase in the demands of process control, especially in rolling and annealing, where even the slightest deviation can lead to strip breakage. Simultaneously, as the silicon content increases (aimed at improving resistivity and optimizing magnetic properties), the material's brittleness increases significantly, making the rolling and processing of ultra-thin products extremely difficult.     The development of "ultra-thin silicon steel" is driven by clear high-end application demands. For example, the new energy vehicle industry pursues high-speed electric drive systems (such as BYD's 30,000 RPM motor). High speed means high frequency, requiring the use of silicon steel sheets as thin as 0.20mm or even thinner to control iron losses, while simultaneously achieving motor miniaturization and weight reduction. In fields such as high-end medical equipment and eVTOL low-altitude aircraft, the extreme requirements for motor size, weight, and response speed are also driving the development of ultra-thin silicon steel technology at 0.15mm, 0.10mm, and even 0.04mm.     Shunge Steel's ultra-thin non-oriented silicon steel, with its superior magnetic properties, has become an ideal material choice for many high-end manufacturing fields. It features low iron loss, high magnetic permeability, and stable magnetic properties, significantly improving energy conversion efficiency. Shunge Steel closely monitors the technological frontiers and development trends of ultra-thin silicon steel, and is committed to providing customers with advanced material solutions.  

The pursuit of ultra-thin non-oriented silicon steel (0.1-0.2mm) aims to significantly reduce energy loss (especially eddy current loss) in motor cores during high-frequency, high-speed operation, thereby improving motor efficiency and performance. This is crucial for fields with extremely high requirements for energy efficiency and power density, such as new energy vehicles, high-end industrial motors, drones, and humanoid robots. 0.2mm thickness: Compared to traditional 0.30mm silicon steel, iron loss can be reduced by 30%-40%; it helps to achieve motor miniaturization and high efficiency, with an average operating efficiency of up to 92%. 0.2mm ultra-thin non-oriented silicon steel has become the mainstream choice for drive motors in many new energy vehicles. 0.15mm thickness: High-frequency iron loss is further improved by more than 10%; it is more suitable for high-speed, low-vibration, and high-efficiency high-end application scenarios, and is generally used in high-end new energy vehicle drive motors, drones, and industrial motors with higher requirements. 0.1mm thickness: Iron loss value exceeds 9W/kg (typical value 8.5W/kg), the highest magnetic performance globally; supports ultra-high motor speeds up to 31,000rpm, generally used in humanoid robots, low-altitude aircraft, top-of-the-line new energy vehicles, and other fields with extreme performance requirements. Why does ultra-thinness reduce losses? This is mainly related to the generation principle of eddy current losses. When the motor core is in a rapidly changing alternating magnetic field, eddy currents are induced inside, generating heat and causing energy loss, i.e., eddy current losses. The magnitude of eddy current losses is proportional to the square of the thickness of the silicon steel sheet. Therefore, making the silicon steel sheet thinner can greatly restrict the flow of eddy currents in each narrow path, increase the loop resistance, and thus effectively reduce the overall eddy current intensity. The pursuit of ultra-thin silicon steel sheets is essentially an inevitable requirement for the development of modern motor technology towards high frequency, high speed, and high power density. It lays the material foundation for improving the efficiency of the entire energy conversion system by directly reducing core iron losses. So, is it difficult to purchase high-quality, low-cost ultra-thin silicon steel? Don't worry! Shunge Steel now offers a series of ultra-thin, non-oriented silicon steel produced , used in the production of motors for humanoid robots, high-end new energy vehicles, and eVTOL aircraft! Welcome to learn more!

Today, with increasingly strict energy efficiency standards for motors and transformers, ultra-thin non-oriented electrical steel is becoming a key material for enhancing the performance of electromagnetic equipment. So, why are more and more engineers choosing this material? Significantly reduce core loss The greatest advantage of ultra-thin non-oriented electrical steel lies in its outstanding energy-saving capacity. As the thickness decreases (typically 0.10mm-0.25mm), the eddy current loss of the material in an alternating magnetic field significantly reduces. Especially in medium and high-frequency application scenarios, the iron loss can be reduced by 30% to 50%, which is crucial for improving the efficiency of the motor.   Enhance the efficiency and power density of motors Modern motor design pursues higher power density and energy efficiency grades. Ultra-thin non-oriented electrical steel, with its excellent magnetic permeability and low loss characteristics, enables motors to achieve a smaller volume while maintaining the same output power, meeting the requirements of compact design.   Optimize high-frequency performance With the development of power electronics technology, the driving frequency of motors is constantly increasing. Traditional silicon steel experiences a sharp increase in loss at high frequencies, while ultra-thin non-oriented electrical steel is specifically optimized for high-frequency applications and can maintain stable magnetic properties within the frequency range of 400Hz to 2000Hz.   Adapt to the demands of intelligent manufacturing Ultra-thin non-oriented electrical steel features excellent stamping performance and surface quality, making it suitable for high-speed automated production. Its consistent material properties ensure the stability of motor performance in mass production, providing a reliable material basis for intelligent manufacturing.   Conclusion Choosing ultra-thin non-oriented electrical steel is not merely about selecting a material; it is about choosing higher energy efficiency standards, more compact design solutions, and superior high-frequency performance. With the continuous improvement of energy-saving requirements, this material is bound to become the mainstream choice in the motor industry.

Regarding "Is silicon steel strong?" In simple terms, the "strong" of silicon steel is more reflected in its electromagnetic properties rather than the mechanical strength against impact as we usually understand it. As a functional material, its mechanical strength is sufficient to meet the processing and usage requirements for its specific purpose, but it is not the core of its design.   The "strong" degree of silicon steel in different dimensions: Mechanical strength (tensile and impact resistance) : In terms of tensile and impact resistance, silicon steel performs moderately weak. Its tensile strength is typically between 370 and 540MPa, which is higher than that of ordinary plastics but far lower than that of specialized structural steels (such as high-strength steel, which can reach over 1000MPa).   Electromagnetic performance "strength" (iron loss, magnetic induction) : In terms of iron loss and magnetic induction, silicon steel demonstrates extremely "strong" and outstanding performance, which is the core value of silicon steel. Low iron loss means high energy conversion efficiency and less heat generation. High magnetic induction can make electrical equipment smaller in size and lighter in weight.   Process performance (adaptability to stamping, shearing and other processing) : In this aspect, silicon steel performs quite well. Silicon steel has certain plasticity, toughness and surface flatness, which can meet the requirements of stamping, shearing and lamination of motor and transformer cores.   A Deep Understanding of the "strong" in Silicon Steel From the above information, it can be seen that to evaluate whether silicon steel is "strong", it is necessary to combine specific scenarios. The core advantage lies in the "high efficiency" and "energy conservation" of electromagnetic performance: The "strength" of silicon steel is mainly reflected in its soft magnetic properties. In an alternating magnetic field, it needs to be easily magnetized and demagnetized, while the energy it consumes (i.e., iron loss) should be as low as possible. This is directly related to the efficiency of transformers and motors. According to statistics, upgrading existing transformers with high-end silicon steel saves nearly as much electricity in a year as the power generation of the Three Gorges Power Station, which shows its significant "strong" contribution in terms of energy conservation.   Mechanical strength is based on the premise of meeting processing and usage requirements: The mechanical strength of silicon steel fully serves its function. Excessive strength or hardness can lead to difficulties in blanking and rapid wear of the die. However, if the strength is too low, it may not be able to ensure that the core maintains structural stability in a high-speed rotating motor. Therefore, its strength is controlled within an appropriate range, capable of withstanding electromagnetic force, centrifugal force and stacking pressure, while also facilitating large-scale and high-precision stamping processing.   The "weak link" to note: Although the overall strength is sufficient, silicon steel, especially cold-rolled silicon steel, is relatively sensitive to processing stress. Shearing, bending and other processing can cause stress and strain to be generated inside the material, which may deteriorate its magnetic properties to a certain extent. Therefore, in some situations with extremely high performance requirements, the completed iron core may need to undergo annealing treatment to eliminate these stresses and restore its best electromagnetic performance.

The locomotion of humanoid robots relies heavily on their "muscles"—electric motors. Currently, Frameless Torque Motors and Coreless Motors are the two most popular types. The following description will provide a quick overview of their functions and characteristics. Joint Power Core: Frameless Torque Motor Humanoid robots have very limited joint space, yet they need to deliver tremendous force. The advantage of a frameless torque motor is that it eliminates the housing and bearings of traditional motors, consisting only of two core components: the rotor and stator. This allows it to be embedded directly into the robot's joints, saving significant space. Achieving Precision Manipulation: Coreless Motors Dexterous robotic hands place distinct demands on motors: they must achieve fast, precise movements within a compact space. Coreless motors, with their ironless "cup-shaped" coil design, eliminate the energy loss associated with traditional iron cores and significantly reduce rotational inertia. This enables them to start and stop instantly with exceptional efficiency, making them ideal for actuating finger joints. Typically, a humanoid robot's hands require 10-12 coreless motors. Other Motors: In addition to the two core motors mentioned above, humanoid robots may also utilize servo motors (for other parts with varying performance requirements) and stepper motors (for parts like the head and eyes that require less load) depending on specific needs.

Ultra-thin non-oriented electrical steel is a very thin (usually less than 0.3 mm) ferrosilicon soft magnetic alloy with a high silicon content. It is a key advanced material for manufacturing high-efficiency motor cores and is particularly suitable for working in high-frequency environments. Producing this "thin as a cicada's wing" yet high-performance material requires overcoming a series of technical and process challenges: 1. Rolling and annealing process: Rolling steel to a uniform thickness of 0.1 mm is a significant challenge in itself. Even more critical is the subsequent continuous annealing process. On annealing lines that can stretch over a kilometer, it is imperative to ensure that the extremely thin strip does not deviate, wrinkle, or break, and that stable welding is achieved. This requires extremely high process control precision. 2. Composition and structure control: By adjusting the content of elements such as silicon (Si) and aluminum (Al), and precisely controlling the hot rolling, cold rolling, and annealing temperatures and times during the production process, we optimize the material's grain structure and magnetic properties. The goal is to achieve the optimal balance between low iron loss and high magnetic induction. 3. Exploring Short-Process Technology: Traditional multi-step cold rolling (such as two-step cold rolling and three-step cold rolling) with intermediate annealing is a long and costly process. The industry is actively developing short-process manufacturing methods, such as attempting to eliminate normalizing treatments or optimize rolling process design, in order to reduce costs and improve efficiency while maintaining performance. The excellent properties of ultra-thin non-oriented electrical steel make it a core functional material in many high-end equipment fields: 1. High-end new energy vehicle drive motors: This is currently the most important and fastest-growing application area. Using ultra-thin silicon steel sheets (e.g., 0.20mm) can significantly improve the efficiency and power density of motors, which is one of the keys to improving the range and performance of electric vehicles. 2. High-end drones and precision servo motors: These devices have extremely high requirements for motor weight, size, and response speed. Ultra-thin electrical steel can meet their lightweight and high-efficiency needs. 3. High-tech military equipment and aerospace: High-efficiency motors and special generators in related equipment require materials that can operate stably in complex and harsh environments. Ultra-thin, high-grade electrical steel is an important choice. 4. High-end home appliances and high-efficiency industrial motors: As energy efficiency standards increase, more and more variable-frequency home appliances and industrial motors are beginning to use thinner electrical steel to improve energy efficiency. The R&D and production of ultra-thin non-oriented electrical steel reflects China's technological strength in new materials and high-end manufacturing. Its development has directly driven technological progress in key industries such as new energy vehicles and intelligent manufacturing.

Transformers are core components of modern power and electronic systems, and their performance depends heavily on the metal materials used. The following information summarizes the main metal materials used in transformers and their key characteristics to help you quickly understand them. Core Materials: 1. Silicon Steel (Electrical Steel): Silicon steel features high magnetic permeability, high saturation magnetic induction, and low losses (especially grain-oriented silicon steel). It is typically used in power transformers, distribution transformers, and motor cores (low-frequency). 2. Soft ferrite: It has the characteristics of high resistivity, small high-frequency loss, but low saturation magnetic induction intensity. It is generally used in high-frequency switching power supply transformers, pulse transformers, magnetic amplifiers (high frequency), etc. 3. Amorphous and nanocrystalline alloys: They have extremely low loss (iron-based) and high magnetic permeability, resulting in significant energy-saving effects. They are used in energy-saving transformers, high-frequency transformers, and common-mode inductor cores. 4. Permalloy: It has extremely high magnetic permeability and low coercive force, but it is relatively expensive and is generally used in weak signal transformers, current transformers, and high-precision instruments. Wire Materials: 1. Copper: Copper wire has excellent electrical conductivity and good mechanical strength, making it the most commonly used in transformer windings. 2. Aluminum: Its electrical conductivity is inferior to copper, but it is lighter and less expensive than copper wire. It is often used in some windings, especially in cost-sensitive or weight-sensitive applications. Key considerations for material selection: When selecting transformer materials, the following factors should be weighed: 1. Frequency range: This is the most critical factor. Silicon steel, due to its high saturation flux density, is the preferred choice for power transformers in low-frequency applications such as industrial frequency (50/60 Hz). Soft ferrites and amorphous/nanocrystalline alloys, on the other hand, excel in high-frequency applications (e.g., kHz to MHz) because their losses are much lower than those of silicon steel. 2. Efficiency and losses: Transformer losses primarily consist of core losses (hysteresis losses and eddy current losses in the core) and copper losses (resistive losses in the coils). Using high-permeability, low-loss core materials (such as high-grade grain-oriented silicon steel or amorphous alloys) and high-conductivity coil materials (such as copper) can significantly improve energy efficiency. 3. Cost-performance balance: Permalloy offers excellent performance but is expensive, and is typically only used in equipment with specialized requirements. Aluminum wire can reduce transformer costs, but its conductivity is inferior to copper, requiring a larger cross-sectional area to achieve similar conductivity. 4. Operating environment: This includes factors such as temperature, humidity, and mechanical stress. For example, the short-circuit resistance of amorphous alloy transformers requires special consideration. Key Summary and Trends: Simply put, silicon steel and copper are the most mainstream and fundamental material combination currently used in the manufacture of industrial frequency, high-power transformers (such as those used in power grids). In contrast, soft ferrites dominate high-frequency, low-power applications (such as mobile phone chargers and switching power supplies). In the future, as energy efficiency requirements continue to increase, the application of high-performance silicon steel (especially high-induction oriented silicon steel) and amorphous alloys in the manufacture of energy-efficient transformers will become increasingly widespread, which is crucial for building a green power grid.

Silicon steel is not soft iron. They are two different soft magnetic materials, with distinct differences in composition, properties, and primary applications. To help you quickly grasp the core differences, the following information summarizes their key characteristics. 1. Silicon steel (silicon steel sheet): Silicon steel is primarily composed of an iron-silicon alloy, with the silicon content generally ranging from 0.5% to 4.8%. Its key features are high resistivity, high magnetic permeability, low coercive force, and minimal eddy current losses. Nevertheless, as the silicon content rises, the brittleness of silicon steel will increase accordingly. It is predominantly applied in the field of alternating current, such as in the cores of electric motors, transformers, and relays.   2. Soft Iron (Electromagnetic Pure Iron / Industrial Pure Iron):  The primary component of soft iron is high-purity iron, with a carbon content below 0.04% and minimal traces of other impurity elements. Its key characteristics include high saturation magnetization, low cost, and excellent processability. However, due to its low resistivity, it exhibits significant eddy current losses under alternating magnetic fields. Therefore, it is generally applied in direct current (DC) or static magnetic fields, such as in electromagnetic cores, pole shoes, and magnetic shielding covers. Why the confusion? Silicon steel and soft iron are often discussed together because they are both soft magnetic materials. These materials share a narrow hysteresis loop, are easily magnetized, and are easily demagnetized. This means they efficiently direct and concentrate magnetic flux lines, and their magnetism quickly disappears after the magnetic field disappears, unlike magnets that retain their magnetism for long periods of time. Historically, early motors and transformers did use soft iron or low-carbon steel directly as cores. However, it was later discovered that adding silicon to pure iron significantly improved its performance under alternating current (AC). This led to the development of silicon steel specifically for AC applications, which gradually became a mainstream material in the power industry. Summary: Simply put, you can understand their roles as follows: Silicon steel is more like a specialist specialized for AC environments, sacrificing some toughness (the addition of silicon causes brittleness) to achieve high resistivity, effectively reducing eddy current losses. Soft iron is a powerhouse in DC or static magnetic fields. Its extremely high saturation magnetization generates a strong magnetic field, but it cannot withstand the high-frequency magnetization reversals of AC.