About Silicon Steel
Oct 20, 2025
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It covers:
- (1) definition - silicon steel is an iron-silicon alloy steel; silicon endows the material with soft magnetism and increases its electrical resistivity; it is mainly used as a magnetic material in motors, transformers, electrical appliances and instruments; it is a low-carbon steel with silicon content of 0.5–4.5%, divided into grain-oriented (GO) and non-oriented (NGO) types, with GO further classified into regular (RGO) and high-permeability (HGO).
- (2) Characteristics - high magnetic permeability, low coercivity and high electrical resistivity give low hysteresis and eddy-current losses; it requires a certain ductility for punching and shearing, low harmful impurities for magnetic induction and low hysteresis loss, plus flat shape and good surface quality; hot-rolled silicon steel production has been phased out in China - all current supply is cold-rolled.
- (3) Applications - from a few ounces in small relays or pulse transformers to several tons in generators, motors and transformers; GO steel is used mainly in power and distribution transformers, while NGO steel is widely used in rotating equipment where low-cost, low-loss materials are required.
- (4) Grades (examples) - common types 23Q110/23Q120/27Q120/30G120 (max core loss 1.10–1.20 W/kg at 1.7 T/50 Hz, lamination factor 97.2–98%, min induction at B800 1.82 T), high-induction types B20P085–B30P105 and 27QG100 (0.85–1.05 W/kg, 1.86–1.89 T), and laser domain-refined types B20R070/B23R085/B27RK085 (0.70–0.85 W/kg); width range 35–1200 mm.
Silicon Steel
Silicon steel, also known as electrical steel, is an iron-silicon alloy steel. The silicon element endows the material with soft magnetism and increases its electrical resistivity. Silicon steel is mainly used as a magnetic material in motors, transformers, electrical appliances and electrical instruments.
Composition and Types
Generally, silicon steel is a low-carbon steel with a silicon content of 0.5% to 4.5%. It is divided into two categories: grain-oriented (GO) and non-oriented (NGO) silicon steel. Grain-oriented silicon steel is further classified into regular grain-oriented (RGO) and high-magnetic-permeability grain-oriented (HGO) silicon steel.
Electrical Steel Characteristics
Silicon steel has high magnetic permeability, low coercivity and high electrical resistivity, resulting in low hysteresis loss and eddy-current loss.
To meet the needs of punching and shearing during electrical-appliance manufacturing, it also requires a certain degree of ductility.
To improve magnetic induction and reduce hysteresis loss, the content of harmful impurities should be as low as possible.
Additionally, it requires a flat plate shape and good surface quality. Hot-rolled silicon steel production has been phased out in China; currently all silicon steel supplied is cold-rolled.
Silicon Steel and Its Applications
As one of the most important soft magnetic materials in use today, silicon steel application quantities range from a few ounces in small relays or pulse transformers to several tons in generators, motors and transformers.
Grain-oriented steel is used in large quantities, mainly in power and distribution transformers, while non-oriented steel is widely used in areas requiring low-cost, low-loss materials - especially in rotating equipment.
electrical steel specifications
Raw Material: Our premium CRGO silicon steel is sourced exclusively from renowned manufacturers, Baosteel and WISCO, ensuring top-tier quality for your transformer core laminations.
GRADE we supply: B30P120, B30P105, B30R100, 27QG120, 27QG100, 23Q110, 23QG100, 23QG095, 23RK090, 23RK085, 23QG085, 23RK085, 23QG085, 23RK080, 23RK075, B23R070, 20QG085, 20RK080, 20RK075, B20R070, B20R065, M0H, M1H, M2, M3, M4, M5.
23HP75d, 23HP80d, 23HP85d, 23HP90d, 23HP95d, 23HP100, 23HP100d, 27HP100, 27HP110, 27CG110, 27CG120, 30CG120, 30CG130
| Type | Grade | Width | Max Core Loss@P1.7T/50Hz | Lamination Factor (%) | Min Induction@B800 |
| Common Type | 23Q110 | 35-1200mm | 1.10w/kg | 97.2 | 1.82T |
| 23Q120 | 1.20w/kg | 97.2 | 1.82T | ||
| 27Q120 | 1.20w/kg | 97.5 | 1.82T | ||
| 30G120 | 1.20w/kg | 98 | 1.82T | ||
| High Induction Type |
B20P085 | 35-1200mm | 0.85w/kg | 97 | 1.86T |
| B23P085 | 0.85w/kg | 97.2 | 1.88T | ||
| B23P090 | 0.90w/kg | 97.2 | 1.88T | ||
| B23P095 | 0.95w/kg | 97.2 | 1.88T | ||
| B23P100 | 1.00w/kg | 97.2 | 1.88T | ||
| B27P095 | 0.95w/kg | 97.5 | 1.89T | ||
| 27QG100 | 1.00w/kg | 97.5 | 1.89T | ||
| B30P105 | 1.05w/kg | 98 | 1.89T | ||
| Domain Refined High Induction Type(Laser) |
B20R070 | 35-1200mm | 0.70w/kg | 97 | 1.86T |
| B23R085 | 0.85w/kg | 97.2 | 1.88T | ||
| B27RK085 | 0.85w/kg | 97.5 | 1.89T |
We meticulously calculate and regularly update quotations based on your comprehensive drawings, ensuring precision and cost-effectiveness in every transaction.
Upon receiving your confirmation, we seamlessly transition into production, adhering stringently to the meticulously detailed drawings you provide to ensure flawless execution.
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1. Raw Material Sourcing
2. Slitting
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Founded in 2008 and located in Anyang in China, Gnee Electric is a high-tech enterprise specializing in researching and manufacturing iron core products.
After more than 18 years of development, we have built our own magnetic material production base and independently develope, produce, and sell various kinds of iron cores. The common types include silicon steel cores, motor cores, transformer cores, toroidal iron cores, special-shaped cores, custom cores, and others. Our cores are widely applied in different sectors including transformers, motors, mutual inductors, voltage stabilizers, welding machines, magnetic amplifiers, and instrumentation, providing diverse core solutions to global customers.
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