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Silicon Steel, also known as Electrical Steel, is a soft magnetic alloy material specifically designed for electromagnetic applications. By adding a specific proportion of silicon to iron and undergoing a series of precise heat treatments and cold rolling processes, it achieves high permeability, low core loss (eddy current loss), and high magnetic induction. Our silicon steel is a key material for manufacturing the cores of electrical equipment like motors and transformers, whose performance directly determines the energy efficiency and performance of the devices.
| Standard | ASTM / JIS / DIN / GB / GOST / EN |
| Grade | - USA (ASTM): ASTM A876, ASTM M-15, M-19, M-22, M-27 |
| - China (GB): GB 50W470, GB 50W400, GB 35W300, GB 35W250 | |
| - Japan (JIS): JIS 50C470, JIS 50C400, JIS 35C300 | |
| - EU (EN): EN M400-50A, EN M350-50A, EN M270-35A, EN M250-35A | |
| Material | - Non-Oriented Silicon Steel (NOES): Grades are classified by maximum core loss (e.g., 35W250) and thickness. |
| Sizes | Thickness: 0.35mm, 0.50mm, 0.65mm |
| Width: 600-1250mm |
Excellent core material for efficient electromagnetic induction.
Reduces energy waste in alternating magnetic fields.
Extremely Low Core Loss and High Energy Efficiency: The high Silicon content significantly increases resistivity and minimizes eddy current loss and hysteresis loss, maximizing energy conservation and making it crucial for the cores of efficient motors and transformers.
Excellent Magnetic Permeability: The crystal structure, whether grain-oriented (CRGO) or non-oriented (CRNGO), exhibits exceptional magnetic permeability, allowing for efficient conduction of magnetic flux and ensuring stable, reliable performance in power equipment.
Reduced Heat Generation and Extended Equipment Life: Minimal core loss effectively reduces heat generated during operation, helping to control temperature rise and prolonging the service life of transformers, generators, and motors, cutting down on operational costs.
Supports High-Power Applications: Its ability to maintain stable performance during rapid magnetization and demagnetization makes it an indispensable functional material for high-frequency, high-power applications in power grids, new energy systems, and electric vehicles.
Power Industry: Large power transformers, distribution transformers.
Motor Sector: New energy vehicle drive motors, industrial motors, home appliance motors (air conditioners, washing machines).
Small Devices: Generators, instrument transformers, reactors, magnetic shielding.
Consumer Electronics: High-frequency transformers, inductive components.
Silicon steel production involves precise chemistry control (0.5–3.2% Si) and specialized processing. For non-oriented (CRNGO) grades, the hot-rolled coil is pickled, cold rolled, and annealed at 800–850°C in a wet hydrogen atmosphere to decarburize and grow grains. For grain-oriented (CRGO) grades, the process includes hot rolling, normalization, cold rolling to intermediate gauge, annealing, final cold rolling, and a secondary recrystallization anneal at 1200°C to develop the Goss texture. An insulating coating (C0–C6) is applied. Key parameters include core loss (W/kg) and magnetic induction (B50), tightly controlled through annealing atmosphere and temperature profiles.
We adhere to international standards like IEC, ASTM, and JIS, and can meet energy efficiency rating requirements (e.g., China Energy Label, EU MEPS). We use Epstein frame or single sheet testers to accurately measure iron loss and magnetic induction, ensuring electromagnetic performance meets standards.
We offer highly specialized custom services:
Cut-to-length (laminations)
Slitting to precise widths
Selection of different surface insulation coating types (C2, C3, C4, C5, C6)
Custom grades with specific magnetic properties
Silicon steel products require extremely high flatness and surface cleanliness. We use clean room packaging, interleaving paper, moisture-proof materials, and sturdy wooden crates or steel cradles to protect products from any physical and chemical damage during transportation. We work with professional and reliable logistics partners to ensure the products arrive safely at your designated port of destination. Shipments are available from major ports like Shanghai, Tianjin, delivering globally.
