Contact Platform Support
Help CenterSilicon Steel & Silicon Steel Coil，35WW440、50WW470、50WW600、50WW800、30Q130、35Q150
Related Products
-
Steel Billet & Square Billet，Q195、Q215、Q235A/B/C/D、10#、20#、35#、45#、50#、20Cr、40Cr、42CrMo、35CrMo、20CrMnTiNegotiableMOQ: 5 Metric Tons -
Square Steel & Square Steel Tube，Q195、Q215、Q235A/B/C/D、Q355B/C/D/E、20#、45#NegotiableMOQ: 5 Metric Tons
-
Steel Channel & Channel Steel，Q195、Q215、Q235A/B/C/D、Q355B/C/D/ENegotiableMOQ: 5 Metric Tons
-
Steel Wire Rope & Steel Strand，GB/T 5224-2023、ASTM A416、EN10138NegotiableMOQ: 5 Metric Tons
-
Steel Round Bar & Round Steel Bar，ASTM A108、ASTM A575、JIS G4051、EN 10263NegotiableMOQ: 5 Metric Tons
1. Product Overview
Silicon steel, also known as electrical steel, is a special soft magnetic iron-silicon alloy steel with a silicon content of 0.5%～4.5% and carbon content lower than 0.08%. It is an indispensable core functional material in electric power, electrical appliance and new energy industries. The addition of silicon element improves the resistivity of steel, reduces hysteresis loss and eddy current loss. It features excellent magnetic conductivity, low core loss, high magnetic flux density and superior stamping & shearing machinability.
Commercial silicon steel is mainly divided into two categories: Cold Rolled Non-Oriented Silicon Steel and Cold Rolled Grain Oriented Silicon Steel. The traditional hot-rolled silicon steel has been basically phased out and rarely used commercially. Supplied in forms of steel coils, custom-sized flat sheets and stamped laminations, it is primarily applied to manufacture iron cores for various electrical equipment to realize mutual conversion between electrical energy and mechanical energy. It is widely used in power grid, electromechanical equipment, new energy, household appliances, industrial control and other fields.
Core Product Advantages
Stable magnetic performance: High magnetization efficiency and low iron core loss, effectively reducing operating energy consumption of electrical equipment and complying with national energy conservation standards;
High resistivity and weak magnetic aging effect; no magnetic degradation after long-term operation to extend the service life of electrical equipment;
Flat steel surface, strong coating adhesion and excellent interlayer insulation performance with low risk of insulation breakdown;
Superior stamping and shearing performance, suitable for mass production of iron core laminations by high-speed dies;
Complete grade series covering ordinary industrial grade to high-end ultra-low loss new energy grade; deep processing services including flattening, slitting, film coating and custom stamping are available;
Genuine raw materials from major domestic steel mills (Baosteel, Shougang, Wuhan Iron and Steel, Ansteel) with unified material standards; complete mill test documents can be provided.
2. Product Classification & Core Performance Comparison
According to production process and magnetic characteristics, commercial silicon steel is classified into cold rolled non-oriented silicon steel and cold rolled grain oriented silicon steel; hot rolled silicon steel is eliminated for most commercial scenarios.
2.1 Cold Rolled Non-Oriented Silicon Steel
Process Principle: Formed by cold rolling and annealing treatment; internal grains are randomly distributed with consistent magnetic properties in all directions without magnetization direction difference.
Appearance Characteristics: Uniform insulating coating on the surface with smooth and flat plate shape; conventional grey or beige organic insulating coating.
Performance Characteristics: Isotropic magnetism in all directions, good formability, easy for bending and stamping; medium iron loss, suitable for rotary electrical equipment.
Application Scenarios: Iron cores for various rotary motors, motors, fans, compressors, generators, new energy vehicle motors and household electrical appliances.
2.2 Cold Rolled Grain Oriented Silicon Steel
Process Principle: Manufactured via precise controlled rolling and high-temperature annealing; internal grains are arranged uniformly along the rolling direction to obtain excellent unidirectional magnetic conductivity. Divided into conventional grain oriented silicon steel and High-B grain oriented silicon steel (HiB).
Appearance Characteristics: Composite insulating coating composed of underlying glass film and outer phosphate coating with dense corrosion-resistant structure; higher flatness precision.
Performance Characteristics: Extremely high magnetic flux density and ultra-low iron loss along the rolling direction; poor transverse magnetic property, relatively high hardness and ordinary stamping performance.
Application Scenarios: Static power conversion equipment; iron cores for power transformers, distribution transformers, reactors, instrument transformers and large-scale grid energy storage equipment.
Performance Comparison of Two Types of Silicon Steel
Comparison Item |
Cold Rolled Non-Oriented Silicon Steel |
Cold Rolled Grain Oriented Silicon Steel |
Magnetic Characteristic |
Isotropic, uniform magnetism in all directions |
Anisotropic, optimal magnetism only along rolling direction |
Iron Loss Index |
Medium & low iron loss, moderate energy consumption |
Ultra-low iron loss, excellent energy-saving performance |
Machinability |
Excellent, suitable for high-speed stamping |
Ordinary, mainly for shearing molding, rarely for stamping |
Core Application |
Motors, generators (Rotary Equipment) |
Transformers, Reactors (Static Power Equipment) |
Material Cost |
Medium cost, high cost performance, largest market consumption |
High price, high cost for high-end grades |
3. Main Grades, Specifications & Executive Standards
3.1 Cold Rolled Non-Oriented Silicon Steel (Mainstream Commercial Product)
Executive Standard: GB/T 2521-2022; Equivalent to JIS, ASTM international electrical steel standards
Common Thickness: 0.35mm, 0.50mm, 0.65mm; Ultra-thin specification 0.27mm, 0.20mm for new energy field
Main Grade Classification
Low Silicon Conventional Grade (Household Appliance & General Motor): 35WW440, 50WW470, 50WW600, 50WW800
Medium Silicon High-Efficiency Grade (Industrial Motor & Water Pump): 50WW310, 50WW350, 35WW300
High Silicon Ultra-Low Loss Grade (New Energy Vehicle & Variable Frequency Motor): 35WW230, 27WW210, 20WW180
3.2 Cold Rolled Grain Oriented Silicon Steel
Executive Standard: GB/T 2521-2022
Common Thickness: 0.23mm, 0.27mm, 0.30mm, 0.35mm
Main Grades
Conventional Grain Oriented Steel: 30Q130, 35Q150
High-B Grain Oriented Steel (High-End Grid Transformer): 27QG100, 30QG110, 35QG120
3.3 Conventional Dimensional Specifications
Coil Width: Standard 1000mm, 1200mm, 1250mm; custom arbitrary width slitting available
Flattened Sheet: Custom fixed length 600-6000mm available
Supply Form: Steel coil, flattened sheet, slit narrow strip, custom stamped iron core lamination
4. Key Core Performance Parameters
Silicon Content: 0.5%～4.5%; Higher silicon content brings lower iron loss, higher hardness and poorer stamping performance
Core Loss (Iron Loss): Core index of electrical steel; Lower value means less equipment heat generation and lower energy consumption
Magnetic Flux Density: Higher value realizes smaller iron core volume and lighter electrical equipment structure
Insulation Coating: Standard C3, C5, C6 grade insulating coating with excellent temperature resistance, voltage resistance and interlayer insulation
Surface Quality: Free of peeling, rust spots, coating falling off and wave deformation; suitable for high-speed stamping
Machining Property: Support shearing, stamping, laser cutting, lamination assembly and annealing deep processing
5. Industry Application Scope
5.1 Industrial Motor Industry (Main Application of Non-Oriented Silicon Steel)
Iron cores for three-phase asynchronous motors, variable frequency motors, water pumps, fans, air compressors and reducer motors; stator and rotor cores for large industrial generator sets.
5.2 Power Grid Industry (Main Application of Oriented Silicon Steel)
Iron cores for high-voltage power transformers, distribution transformers, box-type substations, reactors, current/voltage transformers and grid energy storage equipment.
5.3 New Energy Industry
Iron cores for new energy vehicle drive motors, vehicle-mounted auxiliary motors, wind power generators, photovoltaic inverter and energy storage converter equipment.
5.4 Household & Civil Electrical Appliances
Iron cores for air conditioning compressors, refrigerator motors, electric fans, range hood motors, small relays and ballasts.
5.5 Industrial Control & Precision Electrical Equipment
Iron cores for servo motors, stepping motors, sensors, precision electromagnetic valves and automatic control electromagnetic equipment.
6. Introduction to Surface Insulation Coating
C3 Coating (General Organic Coating): High coating adhesion and cost performance; applied to ordinary motors and household appliances for indoor working conditions.
C5 Coating (Semi-Inorganic Coating): High temperature resistance, high insulation grade and good weldability; specially used for industrial variable frequency and new energy motors.
C6 Coating (Full Inorganic Coating): Excellent high temperature resistance, corrosion resistance and high voltage resistance; dedicated for transformers and high-voltage electrical equipment.
7. Delivery, Deep Processing, Packaging & Quality Inspection
7.1 Deep Processing Service
Support factory flattening, longitudinal slitting, anti-rust film coating, precision stamping, edge grinding and deburring; custom finished iron core stacked laminations available.
7.2 Delivery Cycle
Conventional spot goods: Shipment within 3-7 working days; High-end ultra-low loss and ultra-thin special specifications: Production and delivery within 7-15 working days.
7.3 Product Packaging
International standard export packaging: Bundled with galvanized steel strips, wrapped with waterproof film and kraft board; steel coils equipped with anti-rust corner protectors and solid wooden pallets; moisture-proof and oxidation-resistant for sea transportation to avoid surface scratch and collision damage.
7.4 Quality Inspection & Certifications
Mill test certificate, magnetic performance test report and factory qualification certificate provided on delivery; Support SGS third-party sampling inspection; Complete ISO quality system certifications and full set of customs declaration documents available.
Send Inquiry to This Supplier
You May Also Like
-
Silicon Steel & Silicon Steel Coil，35WW300、50WW470、50WW600、50WW800、27Q110、30Q120、30Q130NegotiableMOQ: 5 Metric Tons
-
Steel Billet & Pipe Production Steel Billet，Q235B、Q355B、20#、45#、40Cr、42CrMo、20CrMnTiNegotiableMOQ: 5 Metric Tons
-
Square Steel & Square Steel Tube，Q195、Q235B、Q355B、20#、45#、16MnNegotiableMOQ: 5 Metric Tons
-
Steel Wire Rope & Prestressed Steel Strand，GJ-25、GJ-35、GJ-50、GJ-70、GJ-100、GJ-120NegotiableMOQ: 5 Metric Tons
-
Channel Steel & Steel Channel，5#、6.3#、8#、10#、12#、14#、16#、18#、20#、25#、30#NegotiableMOQ: 5 Metric Tons
-
Steel Round Bar & Solid Round Steel，Q235B、Q355B、45#、20#、40Cr、42CrMo、Cr12MoV、SS400NegotiableMOQ: 5 Metric Tons
-
Silicon Steel & Silicon Steel Coil，50WW470、50WW600、50WW800、35WW300、30Q120、27Q110、23Q090NegotiableMOQ: 5 Metric Tons
-
Steel Billet & Profile Processing Square Billet，Q195、Q215、Q235B、SS400、3SP、5SP、45#、HRB400NegotiableMOQ: 5 Metric Tons
-
Square Steel & Square Steel Tube，Q235B、Q355B、SPHC、STKR400、STKR490NegotiableMOQ: 5 Metric Tons
-
Steel Channel & Channel Steel，5#、6.3#、8#、10#、12#、14#、16#、18#、20#、25#、30#、40#、Q355B/Q355C/Q355DNegotiableMOQ: 5 Metric Tons
