B23R090 CRGO Electrical Steel Coil 0.23mm For Transformer with low iron loss
Jul 02, 2026
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What is B23R090 grain-oriented silicon steel coil?
B23R090 is a 0.23 mm grain-oriented electrical steel (CRGO) grade defined under GB/T 2521 standard, with a maximum core loss of 0.90 W/kg at 1.7T/50Hz.
It is specially engineered for ultra-high-efficiency power and distribution transformers, dramatically reducing no-load energy consumption and helping transformer manufacturers meet the most stringent no-load loss requirements specified by IEC 60076, DOE, EcoDesign, and national top-tier energy efficiency regulations.
Grade Naming & Product Definition
- B: Produced under Baosteel technical standard system
- 23: Nominal thickness of 0.23mm
- R: High magnetic induction (high-permeability) grain-oriented electrical steel
- 090: Maximum core loss of 0.90 W/kg under 1.7T, 50Hz test conditions
Positioning: Premium energy-saving CRGO steel for high-efficiency medium and small capacity transformers, new energy grid-connected transformers and low-loss reactor applications
We are not limited to grades from a single steel mill. In addition to Baosteel B23R090, we have established stable supply chains with leading manufacturers including WISCO and Ansteel. We can supply grain-oriented silicon steel coils such as B23P090, 23QG090, B23RD090-S and 23AR090 with the identical thickness and core loss performance. Customers can select the most suitable grade flexibly based on project certification requirements and cost budgets.
We currently hold around 400 metric tons of B23R090 in regular stock. However, 250 metric tons have already been reserved for export orders this month, leaving only 150 metric tons available for allocation.
If you require free A4-sized samples or small trial orders, please confirm your demand within this week. We will arrange production schedules on a first-come, first-served basis.
Submit your inquiry right now to receive our free multi-mill grade performance comparison sheet. Our team will also customize a cost-effective procurement solution tailored to your demands to effectively reduce your raw material purchasing expenses.
0.23mm 0.9 W/kg low iron loss Grain-Oriented Silicon Steel Specifications
| Item | Detailed Description |
|---|---|
| Grade Name | B23R090 |
| Nominal Thickness | 0.23 mm |
| Available Width Range | 800 mm – 1250 mm (custom slitting width available) |
| Product Form | Steel Coil / Cut-to-Length Sheets |
| Standard Coil Inner Diameter | 508 mm |
| Usual Coil Weight | 5–15 MT per jumbo coil |
| Available Edge Type | Mill Edge, Slit Edge, Deburred Edge |
| Insulating Coating Type | T4 Inorganic Coating (C5 Organic Coating Optional) |
| Executive Standard | GB/T 2521, IEC 60404, ASTM A665 |
| Equivalent Grades | B23P090, 23QG090, B23RD090-S, 23AR090 |
Core Magnetic Properties of B23R090 grain-oriented silicon steel
| Test Item | Test Condition | Guaranteed Value | Typical Actual Value |
|---|---|---|---|
| Specific Total Core Loss (P₁.₇/₅₀) | 1.7 T, 50 Hz | ≤ 0.90 W/kg | 0.85 W/kg |
| Specific Total Core Loss (P₁.₇/₆₀) | 1.7 T, 60 Hz | ≤ 1.19 W/kg | 1.13 W/kg |
| Magnetic Induction (B₈) | H=800 A/m | ≥ 1.89 T | 1.92 T |
| Lamination Factor | Standard Test | ≥ 95% | 95.5% |
| Density | - | 7.65 kg/dm³ | 7.65 kg/dm³ |
Mechanical Properties of B23R090 CRGO Electrical Steel
| Mechanical Index | Test Direction | Typical Value |
|---|---|---|
| Tensile Strength | Rolling (Longitudinal) | 352 MPa |
| Elongation Rate | Rolling (Longitudinal) | 6 % |
| Vickers Hardness | HV1 | 180 HV |
B23R090 CRGO Electrical Steel Equivalent Grades (0.23mm, P1.7/50 ≤0.90W/kg)
| Steel Mill | Baosteel | WISCO | Ansteel | Shougang | NSC (Japan) | JFE (Japan) | POSCO (South Korea) | TKS (Germany) | AK (USA) |
|---|---|---|---|---|---|---|---|---|---|
| Equivalent Grade | B23R090 | 23QG090 | 23AR090 | 23RD090-S | 23ZH090 | 23JGH090 | 23PH090 | M090-23P5 | 23H090 |
Dimensional Tolerance Table of Grain-Oriented Silicon Steel
| Nominal thickness | Nominal thickness tolerance | Longitudinal thickness | Traverse thickness | Width tolerance | Flatness | Camber within |
|---|---|---|---|---|---|---|
| mm | mm | mm | mm | mm | % | mm |
| 0.18 | ±0.015 | ≤0.020 | ≤0.010 | 0~+1 | ≤1.5 | ≤0.9 |
| 0.20 | ±0.015 | |||||
| 0.23 | ±0.020 | ≤0.025 | ≤0.015 | |||
| 0.27 | ±0.025 | |||||
| 0.30 | ±0.025 | |||||
| 0.35 | ±0.025 |
Key Performance Advantages of 0.23mm 0.90W/kg Low Iron Loss Silicon Electrical Steel
0.90W/kg Ultra-Low Core Loss for Long-Term Energy Saving
Approximately 25% lower core loss compared with conventional 23Q120 grades, and 10% lower than mainstream 23QG100 grades, significantly reducing end-user electricity expenses and shortening investment payback period.
0.23mm Thin Gauge for Reduced Eddy Current Loss
0.23mm thickness effectively suppresses eddy current loss under medium-high frequency conditions, improving overall efficiency of PV/wind grid-tied transformers and high-frequency reactors.
High Magnetic Induction for Compact Core Design
High magnetic induction value allows smaller core cross-section, reducing total steel consumption and lowering transformer manufacturing costs and overall equipment weight.
Stable Coating & Reliable Processability
Uniform insulating coating with good stress resistance; stable magnetic properties after stress relief annealing, compatible with high-speed automatic stamping lines and precision core stacking processes.
Imagine reducing transformer no-load loss by approximately 25% without changing your core design. That's exactly what B23R090 delivers.
Your competitors may tell you that "B23R090 and B23P090 deliver identical performance", yet actual test data never lies. The typical core loss of our B23R090 reaches only 0.85 W/kg, while batch inspection results for same-spec products from other brands usually range between 0.88 W/kg and 0.89 W/kg. Do not overlook this tiny gap of 0.03–0.04 W/kg: it translates to a nearly 5% difference in no-load loss for a large-sized transformer.
Manufacturing Process of B23R090 Grain-Oriented Silicon Steel
0.23mm 0.90W/kg Silicon Steel for Transformer
This CRGO steel is widely applied in 10kV~35kV oil-immersed distribution transformers, dry-type cast resin transformers, new energy photovoltaic & wind power grid-connected step-up transformers, as well as instrument transformers and low-noise series reactors with a capacity range from 10kVA to 2500kVA. It perfectly matches the production of Grade 1 ultra-high energy efficiency transformers such as S15, S20, SCB18 and SCB20 series for global export projects.
B23R090 vs B23R095 vs 23QG100
| Property | B23R090 | B23R095 | 23QG100 |
|---|---|---|---|
| Steel Type | Domain-refined high-permeability CRGO | Domain-refined high-permeability CRGO | High magnetic induction CRGO |
| Nominal Thickness | 0.23 mm | 0.23 mm | 0.23 mm |
| Maximum Core Loss (P1.7/50) | ≤0.90 W/kg | ≤0.95 W/kg | ≤1.00 W/kg |
| Minimum Magnetic Induction (B8) | ≥1.87 T | ≥1.87 T | Typically ≥1.88 T* |
| Recommended Applications | Ultra-high-efficiency power transformers, premium distribution transformers, renewable energy transformers | High-efficiency distribution transformers, industrial transformers | Standard energy-efficient distribution transformers |
| Relative Material Cost | Highest | Medium–High | Medium |
*The minimum magnetic induction value may vary slightly depending on the steel manufacturer and applicable product specification. Always refer to the mill test certificate (MTC) for the certified values.
Performance Comparison ：B23R090 vs B23R095 vs 23QG100
| Grade | Relative Core Loss* |
|---|---|
| B23R090 | 100% (Reference) |
| B23R095 | Approximately 5–6% higher than B23R090 |
| 23QG100 | Approximately 11% higher than B23R090 |
Relative comparison based on the guaranteed maximum specific total loss values (0.90, 0.95 and 1.00 W/kg) under identical test conditions of 1.7 T and 50 Hz. Actual transformer efficiency also depends on core design, manufacturing process and operating conditions.
Which Grade Should You Choose?
| If Your Priority Is... | Recommended Grade | Reason |
|---|---|---|
| Lowest possible no-load loss | B23R090 | Best energy efficiency with the lowest guaranteed core loss. |
| Best balance between efficiency and cost | B23R095 | Slightly higher core loss than B23R090 while offering a more economical solution. |
| Standard energy-efficient transformer production | 23QG100 | Widely used grade with stable performance and competitive cost. |
Why Choose GNEE Electric?
GNEE Electric – Value-Added Services
Flexible coil specifications: We supply prime quality, concession/off-grade, jumbo coils (12–15 tons), and small/mini coils (from 50 kg upward) to suit different production volumes and cost requirements.
In-house precision processing lines: Equipped with slitting, cut‑to‑length, automatic lamination stacking, laser cutting, edge finishing, and narrow strip recoiling equipment, supporting high‑precision customisation.
Core processing services: We offer precision slitting, cut‑to‑length blanking, laminated core stacking (limbs + yokes) per your drawings, and narrow strip pancake coil winding – delivering semi‑finished or fully assembled components.
Edge finishing options: Available in as‑rolled/mill edge, sheared/trimmed edge, slit edge, dressed/finished edge, deburred edge, square/right‑angle edge, rounded edge, chamfered edge, laser‑cut edge, and punched/stamped edge – meeting various insulation and voltage withstand requirements.
GNEE Electric – Packaging
1. Coil Weight ＜ 4 Tons
- Inner & outer special air anti-corrosion paper
- Overall thin plastic film sealing
- Internal & external paper corner protectors, end covers and surrounding protection plate
- Inner & outer metal angle protection rings
2. Coil Weight ≥ 4 Tons
- Based on the above packaging, an extra external buffer board is added for enhanced anti-collision protection.
All packaging is seaworthy, protecting coils from rust, scratches and deformation during long-distance transportation.
Attention: The global lead time for grain-oriented silicon steel has been extended, with some steel mills scheduling production all the way to Q4 2026. If you fail to place your order now, you may face delivery delays of more than three months, which will directly disrupt the delivery schedule of your export orders.
We have B23R090 in stock available for immediate slitting and shipment within 72 hours. Click "Request A Quote" to secure your priority production arrangement, and receive our complimentary 2026 Grain-Oriented Silicon Steel Price Trend Forecast Report.
Get in touch with us right away to obtain a free multi-mill grade performance comparison sheet. Our professional team will tailor the most cost-effective procurement solution to help you cut down your raw material costs.
FAQ
What is the thickness and standard dimension tolerance of B23R090 silicon steel?
B23R090 nominal thickness is 0.23mm. We provide full dimensional tolerance data including thickness deviation, width tolerance, flatness and camber to ensure stable processing for high-speed slitting and stamping. Available width ranges from 800mm to 1250mm with custom slitting service supported.
Can I get the official MTC and SGS test report for B23R090?
Yes. Each batch of our B23R090 silicon steel is attached with original mill test certificate (MTC). We can also provide third-party SGS inspection reports to support your overseas customs clearance, transformer energy efficiency certification and grid bidding projects.
Is B23R090 interchangeable with B23P090?
They can be used interchangeably in most transformer designs, but B23R090 adopts laser magnetic domain refinement technology. Its typical core loss is lower and operating noise is smaller, more suitable for super high-efficiency and low-noise transformer projects, while B23P090 is a more cost-effective choice for conventional high-efficiency products.
How can I get a cost-effective procurement plan for B23R090?
Submit your inquiry to get our free multi-mill grade performance comparison table. Our professional team will recommend the most suitable grade combination and customized bulk pricing scheme according to your transformer energy efficiency standard and budget, helping you effectively control raw material procurement costs.
GNEE Steel Grain-Oriented Silicon Steel Inventory
| 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 | ||
| B27P100 | 1.00w/kg | 97.5 | 1.89T | ||
| B30P120 | 1.20w/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 |