Grain Oriented Electrical Steel In China
Lamnow can provide grain oriented electrical steel sheets called also transformer sheets. Our GOES steel lamination is widely used in transformer core and motor stator cores, helping improve efficiency and reduce energy loss.
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Premium grain-oriented electrical steel delivers low losses, high magnetic permeability, precise grain alignment, and improved efficiency for transformer cores and applications.
What is GOES?
Grain Oriented Electrical Steel (GOES) is a silicon-iron alloy with a silicon content of approximately 2.9%–3.5%.
Its crystal grains are highly aligned in the rolling direction, resulting in strong magnetic anisotropy. In the rolling direction, GOES exhibits the lowest core loss and the highest magnetic permeability.
Advantages Of Oriented Electrical Steel
- Low iron loss
- Excellent adhesion
- Low noise
- Good consistency
- Outstanding process ability
- Perfect dimensional accuracy
difference between GOES and NGOES
- GOES (Grain Oriented Electrical Steel) has strong magnetic properties in a specific direction. NGOES (Non-Oriented Electrical Steel) has uniform magnetic properties.
- GOES is mainly used in transformer cores where magnetic flux follows a fixed path. NGOES is typically used in motors, generators, and rotating electrical machines.
Grain Oriented Silicon Steel Material Manufactured
The production of Grain Oriented Electrical Steel material involves a complex and carefully controlled process.
The typical manufacturing process includes:
Hot rolling
Normalizing
Cold rolling
Decarburization annealing
High-temperature annealing
In addition, special inhibitors such as MnS (manganese sulfide) and AlN (aluminum nitride) are added to control grain growth.
Applications of Oriented Steel Lamination
The main area in which grain oriented electrical sheets are used are the cores of power and distribution (distribution) transformers, and motor stator teeth.
Grain Oriented Steel For Transformer Core
Grain oriented electrical steel is used in transformer cores, with in-die bonding in progressive stamping to ensure high efficiency, low core loss, and stable laminated structure.
Oriented Steel Motor Stator Teeth
Grain oriented electrical steel (20SQG1200) is used for motor stator teeth, with bonding technology applied to ensure low core loss, high efficiency, and stable laminated structure.
Grain Oriented Steel For Toroidal Core
Toroidal oriented steel lamiantion used in current transformers, voltage transformers, seactors, magnetic screens and audio transformers
Technical Specifications Of Cold Rolled Grain Oriented Sheets
| Thickness | Grade | Max.Core loss (W/kg)（P1.7/50） | Min. Induction (T)J800 | Min. Lamination factor |
|---|---|---|---|---|
| 0.18mm | 18SQG075 | 0.75 | 1.89 | 0.955 |
| 18SQG080 | 0.8 | 1.88 | 0.955 | |
| 18SQG085 | 0.85 | 1.88 | 0.955 | |
| 18SQG090 | 0.9 | 1.88 | 0.955 | |
| B18R055 | 0.55 | 1.89 | 0.95 | |
| B18R060 | 0.6 | 1.89 | 0.95 | |
| B18R065 | 0.64 | 1.89 | 0.95 | |
| B18R070 | 0.69 | 1.88 | 0.95 | |
| B18R075 | 0.74 | 1.88 | 0.95 | |
| 0.2mm | 20SQG075 | 0.75 | 1.89 | 0.955 |
| 20SQG080 | 0.80 | 1.89 | 0.955 | |
| 20SQG085 | 0.85 | 1.88 | 0.955 | |
| 20SQG090 | 0.90 | 1.88 | 0.955 | |
| 20SQG095 | 0.95 | 1.88 | 0.955 | |
| B20R060 | 0.60 | 1.89 | 0.95 | |
| B20R065 | 0.65 | 1.89 | 0.95 | |
| B20R070 | 0.69 | 1.89 | 0.95 | |
| B20R075 | 0.74 | 1.88 | 0.95 | |
| B20R080 | 0.78 | 1.88 | 0.95 | |
| B20R085 | 0.82 | 1.88 | 0.95 | |
| 0.23 | 23SQG080 | 0.8 | 1.89 | 0.955 |
| 23SQG085 | 0.85 | 1.89 | 0.955 | |
| 23SQG090 | 0.9 | 1.88 | 0.955 | |
| 23SQG095 | 0.95 | 1.88 | 0.955 | |
| 23SQG100 | 1.00 | 1.88 | 0.955 | |
| B23R070 | 0.7 | 1.90 | 0.955 | |
| B23R075 | 0.75 | 1.89 | 0.955 | |
| B23R080 | 0.79 | 1.88 | 0.955 | |
| B23R085 | 0.82 | 1.88 | 0.955 | |
| B23R090 | 0.88 | 1.88 | 0.955 | |
| 0.27 | 27SQG090 | 0.90 | 1.89 | 0.96 |
| 27SQG095 | 0.93 | 1.89 | 0.96 | |
| 27SQG100 | 0.96 | 1.89 | 0.96 | |
| 27SQG110 | 1.05 | 1.88 | 0.96 | |
| B27R080 | 0.80 | 1.90 | 0.96 | |
| B27R085 | 0.84 | 1.89 | 0.96 | |
| B27R090 | 0.87 | 1.89 | 0.96 | |
| B27R095 | 0.92 | 1.88 | 0.96 | |
| 0.30 | 30SQG095 | 0.95 | 1.89 | 0.965 |
| 30SQG100 | 0.98 | 1.89 | 0.965 | |
| 30SQG105 | 1.01 | 1.89 | 0.965 | |
| 30SQG120 | 1.05 | 1.88 | 0.965 | |
| B30R090 | 0.89 | 1.90 | 0.965 | |
| B30R095 | 0.92 | 1.90 | 0.965 | |
| B30R0100 | 0.96 | 1.89 | 0.965 | |
| B30R0105 | 1.00 | 1.89 | 0.965 |
Quality Control For Grain Oriented Electrical Steel
- Raw Material Verification:All GOES materials are sourced from leading steel manufacturers such as Baosteel and Nippon Steel, with full material certificates provided.
- Dimensional Inspection:Precision measurements are carried out to ensure accurate thickness, width, and cutting tolerances.
- Surface Coating Inspection:The insulation coating is checked for uniformity, adhesion, and resistance to peeling during processing, ensuring reliable interlaminar insulation.
- Magnetic Property Testing: Core loss and magnetic induction are tested according to international standards to ensure stable electromagnetic performance.
- Stacking Quality Control: Lamination stacking is controlled to achieve a high lamination factor and consistent stack height, reducing air gaps and improving efficiency.
Oriented Steel FAQS
GOES laminations are typically coated with insulation layers such as C-2 or C-5 coatings. These coatings provide electrical insulation between laminations, reduce eddy current losses, and improve stacking performance. High-quality coatings also ensure strong adhesion and prevent peeling during cutting, slitting, and core assembly processes.
Yes, GOES can be processed into customized forms to meet specific transformer designs. This includes precision slitting, cut-to-length laminations, step-lap cutting, and complete core assembly. Manufacturers can also adjust dimensions, coating types, and stacking methods to optimize performance, reduce core loss, and improve overall efficiency.
GOES without base coating is typically used when additional bonding processes such as adhesive bonding or backlack coating are required. It offers more flexibility for customized insulation systems and special manufacturing processes.
Laser scribed GOES is processed with fine laser lines on the surface to refine magnetic domains. This reduces core loss, especially under high-frequency or load conditions. It is widely used in high-efficiency transformers and premium electrical equipment.
Choose High-Quality Grain Oriented Electrical Steel Supplier
Choose high-quality grain oriented electrical steel for your project. Contact us today for competitive pricing, fast delivery, and customized solutions to improve efficiency and reduce core loss.
