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.   

1. Key characteristics of ASTM standard silicon steel coilsIn the field of power transmission and conversion, silicon steel coils, as an indispensable soft magnetic material, directly determine the energy efficiency of electrical equipment such as transformers and motors. Among them, silicon steel coils conforming to ASTM standards, with their superior magnetic and mechanical properties, have become the preferred material for the manufacture of high-end electrical equipment worldwide. With the advancement of energy conservation and emission reduction policies in various countries, especially the "dual-carbon" target leading to energy transformation, the quality requirements for silicon steel coils are becoming increasingly stringent. ASTM standards, as internationally recognized specifications, provide authoritative technical guidance for the production and application of silicon steel coils. ASTM standards cover the technical requirements for non-oriented silicon steel coils, a material with low carbon content (typically below 0.020%) and a specific silicon-aluminum-iron alloy composition. The silicon content is controlled between 0.50% and 3.20%, effectively reducing eddy current losses by increasing resistivity. Silicon steel coils conforming to ASTM standards have the characteristics of low iron loss and high magnetic permeability.     2. Strict production and testing processes ensure consistent quality.The production process of ASTM standard silicon steel coils strictly adheres to specifications, requiring precise control at every stage from smelting and hot rolling to cold rolling annealing. The annealing process, in particular, effectively eliminates internal stress and optimizes grain structure, thereby improving magnetic properties. Quality control employs precision instruments such as Epstein square rings and monolithic magnetometers to measure iron loss and magnetization curves. Insulation coating testing is equally important; interlayer resistance meters assess the coating's insulation performance to ensure compliance with ASTM standards. Coating thickness is typically controlled between 0.5 and 3.0 μm, with a surface resistivity of 5-50 Ω·cm², effectively preventing eddy current losses during laminated applications.   3. ASTM standard silicon steel coils are widely used in the power industry. In transformer manufacturing, especially small power transformers, their high magnetic flux density significantly reduces no-load losses and improves energy efficiency. In electric motor applications, the isotropic properties of non-oriented silicon steel coils are suitable for manufacturing stator and rotor cores. ASTM standard silicon steel coils are also widely used in new energy vehicle drive systems, solar inverters, and wind power generation equipment. Their high magnetic flux density and low iron loss characteristics perfectly meet the stringent requirements of high-efficiency energy conversion in the renewable energy sector. The home appliance industry also benefits from this; from air conditioner compressors to refrigerator motors, ASTM standard silicon steel coils help equipment achieve higher energy efficiency standards while reducing operating noise.

The key to improving the performance of drive motors in new energy vehicles lies in the continuous innovation of electrical silicon steel materials and coating technologies. As the core material of the motor stator core, the performance of low-iron-loss laminated silicon steel directly determines the motor's energy efficiency, power density, and range.   Thinning the steel sheet is one of the most effective technical approaches to reducing iron loss. Thinner silicon steel sheets can significantly reduce high-frequency eddy current losses and improve motor efficiency.   Low-iron-loss motor laminated silicon steel is indeed a key component in improving the energy efficiency of current motor technology. Through collaborative innovation in materials, processes, and design, it provides a solid foundation for the efficient, miniaturized, and low-noise operation of motors.   Low-iron-loss motor laminated silicon steel technology is directly driving energy efficiency upgrades in several key industries, such as new energy vehicle drive motors: this is currently the most cutting-edge area of  technology application. To achieve longer range and higher power density, new energy vehicle drive motors need to maintain low losses at high speeds. The use of ultra-thin silicon steel sheets has become a standard configuration for high-end motors.   In the future, technology will continue to evolve, moving towards thinner (e.g., 0.10mm and below), higher strength, and even integration with sensors to achieve intelligent status monitoring, providing continuous material support for the "dual carbon" goal.  

Non-oriented silicon steel with a thickness between 0.2 mm and 0.35 mm is a key material for core components of new energy vehicles, such as drive motors and on-board chargers, and directly affects the vehicle's power, economy, and reliability.   Why is silicon steel so crucial? New energy vehicle drive motors strive for miniaturization, high efficiency, and high power density. This places extremely high demands on their "heart" material—silicon steel. High frequency and low loss: When the motor rotates at high speed (up to tens of thousands of revolutions per minute), the internal magnetic field changes at a very high frequency (400-1500Hz). The thinner the silicon steel sheet, the lower the eddy current loss, the higher the motor efficiency, and the more guaranteed the driving range. Studies have shown that compared to 0.35mm silicon steel, motors using 0.30mm silicon steel can increase the high-efficiency area by more than 20%.   High magnetic flux density: High magnetic flux density means that the motor can generate a stronger magnetic field under the same current, thereby obtaining greater torque and power density, which helps to achieve motor weight reduction.   Application scenarios: New energy silicon steel with a thickness of 0.30mm-0.35mm has good cost-effectiveness, meets basic performance requirements, and is generally used in the auxiliary motors of some A0-class electric vehicles and hybrid vehicles. New energy silicon steel with a thickness of 0.25mm-0.27mm has the characteristics of balancing performance and cost, low iron loss and high magnetic induction, and is the current mainstream stator core for electric vehicle drive motors.   New energy silicon steel with a thickness of 0.20mm or less features extremely low iron loss, optimal high-frequency performance, and suitability for ultra-high speeds. It is generally used in high-performance motors with speeds ≥15000rpm.   The thinness of silicon steel is primarily to address the challenges posed by the increasing frequency of drive motors. Higher motor speeds result in higher frequencies of internal magnetic field changes, leading to significant eddy current losses in the silicon steel sheets. Using thinner silicon steel sheets (such as 0.25mm or 0.20mm) effectively suppresses eddy currents and reduces iron losses, thereby improving motor efficiency. This is crucial for extending vehicle driving range.    

Ultra-thin silicon steel (especially 0.1-0.2mm thick) is a core material for drive motors in new energy vehicles, and its technical level directly affects the efficiency, power density, and overall vehicle performance of the motor. 1. Improved energy efficiency: Generally speaking, the thinner the silicon steel sheet, the lower the eddy current loss. For example, reducing the thickness of the silicon steel sheet from 0.5mm to 0.1mm can reduce eddy current loss to 1/25 of the original. Therefore, new energy vehicle motors made of ultra-thin silicon steel can reduce energy waste and extend the driving range.   2. Power density: Thinner silicon steel allows motors to operate at higher speeds, thus increasing power density. For example, motors using 0.1mm ultra-thin silicon steel can reach speeds of up to 31,000 rpm. Motors made with ultra-thin silicon steel output more power in the same volume, or reduce motor size for the same power, contributing to vehicle weight reduction.   3.  Reduce iron loss: Iron loss is a key indicator for measuring the energy loss of silicon steel sheets. Ultra-thin silicon steel has a lower iron loss value, which can directly reduce the heat generation and energy waste during motor operation, and help improve output power and range.   Ultra-thin silicon steel is a crucial component in the performance race of new energy vehicles. As material thickness continues to decrease to 0.1mm and below, the motors in new energy vehicles will become more powerful, efficient, and compact. The development of ultra-thin silicon steel continues, with a clear trend towards thinner, higher-performance (lower iron loss, higher strength) and broader applications (expanding from new energy vehicles to low-altitude aircraft, humanoid robots, etc.).   Shungesteel now offers ultra-thin silicon steel with a thickness of 0.1-0.2 mm, suitable for use in electric motors for new energy vehicles, providing high-quality material solutions for manufacturers of high-performance electric motors for new energy vehicles.Welcome to learn more.  

Ultra-thin silicon steel (0.1-0.2mm) is a key material driving robotics technology toward high performance and precision, and is indispensable, especially in advanced robotic systems that require high power density, fast response and precise positioning.   Ultra-thin silicon steel is mainly used in the following core components of robots, making it an ideal material for their "power heart".   Joint motors: The movements of multiple joints in a humanoid robot, such as the neck, waist, and fingers, rely on joint motors for power and precise control. A single humanoid robot can contain up to 50 motors. Motors made of ultra-thin silicon steel can output powerful torque in a very small volume and achieve millisecond-level response speeds, making the robot's movements more flexible and human-like.     Dexterous Hands and Coreless Motors: Dexterous hands in robots require more precise motors, such as coreless motors and frameless torque motors. Ultra-thin silicon steel can meet the manufacturing requirements of coreless motors for dexterous hands, which are only 6 millimeters in size, and is the foundation for achieving fine finger manipulation.   The superior performance of ultra-thin silicon steel stems from the fundamental advantages of its physical properties:   Minimizing Iron Loss: Silicon steel sheets experience energy loss (iron loss) due to eddy currents in alternating magnetic fields, which is dissipated as heat. Eddy current loss is proportional to the square of the steel sheet thickness. Reducing the thickness of silicon steel sheets from the traditional 0.35mm or 0.5mm to 0.1mm or 0.2mm, creating ultra-thin silicon steel, significantly reduces iron loss.     Achieving High Power Density and Miniaturization: Using ultra-thin silicon steel allows for the manufacture of smaller and lighter motors with the same power output. This is crucial for robot joints where space is extremely limited, directly contributing to their miniaturization and weight reduction.   Shunge Steel now offers ultra-thin silicon steel with a thickness of 0.1-0.2 mm, providing material solutions for high-performance robot manufacturers. Welcome to learn more.  

Ultra-thin silicon steel and self-adhesive coating technology are core technologies in the manufacturing of high-end motors and transformers. Their combined application is driving the development of products in fields such as new energy vehicles and power electronics towards higher efficiency, higher power density, and lower noise. When ultra-thin silicon steel is combined with self-adhesive coating technology, a synergistic effect of "1+1>2" can be achieved, with the main advantages being: 1. Significantly Reduced Losses in Ultra-Thin Silicon Steel Cores: Self-adhesive coating technology avoids the mechanical stress and localized short circuits associated with traditional welding and riveting through overall bonding, thus better preserving the excellent magnetic properties of ultra-thin silicon steel. Tests show that compared to welded cores, self-adhesive cores can reduce iron losses by approximately 5% and excitation current by 9%. 2. Effectively reduces vibration and noise: The self-adhesive coating technology effectively suppresses vibration transmission between silicon steel sheets, resulting in better overall core integrity. Data shows that the noise generated by a self-adhesive core can be approximately 5 dB lower than that of a welded core.   3. Facilitating Miniaturization and Weight Reduction: Self-adhesive technology eliminates or reduces the use of traditional fasteners (such as end plates and pressure rings), maximizing the effective length of the core within a limited space, thus achieving a smaller volume for the same power output. These advantages make this technology combination ideal for applications with stringent requirements for efficiency, size, and noise, such as drive motors for new energy vehicles, high-end home appliance compressors, drone power systems, ultra-high voltage transformers, and precision power electronic equipment. Shunge Steel now offers ultra-thin silicon steel with a thickness of 0.1-0.2mm, as well as axial cores made from ultra-thin silicon steel using self-adhesive coating technology. Welcome to learn more.

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!