B23R085 0.23mm Ultra-Low Loss Grain-Oriented Electrical Steel
Jun 11, 2026
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B23R085 is a premium grade of Cold-Rolled Grain-Oriented (CRGO) electrical steel. It is defined by its 0.23 mm nominal thickness and a guaranteed maximum core loss of 0.85 W/kg at 1.7T/50Hz. This material is a critical component for high-efficiency power transformers and distribution transformer cores, where reducing no-load losses and improving energy efficiency are key design objectives.
As global energy-efficiency standards become increasingly stringent, B23R085 has become one of the most widely selected CRGO grades for S13, S15, S20, and other high-efficiency transformer designs.
Looking for high-quality B23R085 CRGO electrical steel for transformer manufacturing?
GNEE supplies grain-oriented electrical steel coils, slit coils, and cut laminations with strict quality control and flexible customization options. With export experience in more than 150 countries, we help transformer manufacturers reduce core losses, improve efficiency, and shorten procurement cycles through reliable global delivery and responsive technical support.
Send us your required grade, thickness, width, or annual demand, and our engineers will recommend the most cost-effective solution within 24 hours.
Understanding The B23R085 Specification
The nomenclature of B23R085 follows international standards such as IEC 60404 and manufacturer-specific standards like Baosteel Q/BQB 480.
- B: Baosteel brand.
- 23: Nominal thickness 0.23 mm
- R: Laser domain refined grain-oriented electrical steel
- 085: Maximum core loss P1.7/50 ≤ 0.85 W/kg
Technical Specifications
| Property | Typical Value | Test Condition |
|---|---|---|
| Nominal Thickness | 0.23 mm | -- |
| Maximum Core Loss P1.7/50 | 0.85 W/kg | 1.7T, 50Hz |
| Typical Magnetic Induction B8 | 1.88 T | 800 A/m |
| Lamination Factor | >95.5% | -- |
| Coating Type | Inorganic insulating coating | C-5 or Equivalent |
B23R085 Electrical steel Electromagnetic performance standard
Grade | Thickness (mm) | Density (kg/dm3) | Maximum iron loss P15/50 (W/kg) | Minimum Magnetic Induction B8 |
| B23R085 | 0.23 | 7.65 | 0.85 | 1.87 |
B23R085 Electrical steel equal grade
| BaoSteel | WISCO | NSC | JFE | Congent | TKS | POSCO | NI&SCo | AK |
| B23R085 | - | 23ZDKH85 23ZDMH85 | 23JGSD85 | H085-23 | 23PHD085 | - | - |
GNEE New Material 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 |
High-Quality & Fully Assembled Cores
- Maximum Weight of Automatically Stacked Core: An impressive 60 Tons
- Maximum Weight of Manually Stacked Core: A robust 120 Tons
- Gap Limit at the Joint: Precision engineering ensures a gap limit of less than 1mm
- Window Height Precision: Exacting standards yield a precision of ±1mm
- Window Width Precision: Unmatched precision with a tolerance of ±1mm
Why Is B23R085 Better Than Traditional 0.30 mm CRGO Steel?
One of the primary reasons transformer manufacturers choose B23R085 is its ability to reduce total core loss while maintaining excellent magnetic performance.
Lower Eddy Current Loss
Eddy current loss is proportional to the square of the steel thickness. Compared with conventional 0.30 mm CRGO steel, the thinner 0.23 mm gauge significantly suppresses circulating currents within the core.
As a result, B23R085 can reduce no-load losses by approximately 15%–20% compared with older-generation CRGO materials used in standard distribution transformers.
Higher Transformer Efficiency
Lower core loss means less electrical energy is converted into heat during operation. This directly improves transformer efficiency and reduces long-term operating costs for utilities and industrial users.
Reduced Operating Temperature
By generating less heat inside the core, B23R085 helps maintain lower operating temperatures, which can contribute to longer insulation life and improved transformer reliability.
The Science Behind The 0.23 mm Thickness
The total core loss of a transformer consists of hysteresis loss and eddy current loss.
Eddy Current Suppression
Reducing thickness from 0.30 mm to 0.23 mm increases electrical resistance across laminations and significantly lowers eddy current generation.
Domain Refinement Technology
Many premium B23R085 products undergo laser domain refinement or similar surface treatments. These technologies optimize magnetic domain structures and allow magnetic flux to move more efficiently through the steel.
High Magnetic Permeability
With a typical magnetic induction value above 1.88 T, B23R085 allows transformer cores to operate at higher flux densities while maintaining excellent efficiency and avoiding premature saturation.
B23R085 vs B27R095 vs B30P105
Transformer designers often compare B23R085 with other grain-oriented electrical steel grades.
| Grade | Thickness | Core Loss P1.7/50 |
| B23R085 | 0.23 mm | 0.85 W/kg |
| B27R095 | 0.27 mm | 0.95 W/kg |
| B30P105 | 0.30 mm | 1.05 W/kg |
At 1.7T & 50Hz, B23R085 has around 19% lower core loss than B30P105, with equivalent magnetic performance. This makes it particularly attractive for energy-efficient transformer designs.
B23R085 vs B23P085
Although both grades have the same thickness and core-loss rating, they serve different performance requirements.
| Property | B23R085 | B23P085 |
| Type | Regular GO | High Permeability GO |
| Core Loss | 0.85 W/kg | 0.85 W/kg |
| Magnetic Permeability | Standard | Higher |
| Transformer Noise | Standard | Lower |
| Material Cost | Lower | Higher |
For premium low-noise transformers and ultra-high-efficiency applications, B23P085 is often preferred. For most power and distribution transformers, B23R085 provides an excellent balance between cost and performance.
How Much Energy Can B23R085 Save?
The reduction in no-load loss may appear small on paper, but the energy savings accumulate continuously throughout the transformer's operating life.
For example, if a 1000 kVA distribution transformer reduces no-load loss by 150 W through the use of B23R085, the annual energy savings can exceed:
- 150 W × 24 hours × 365 days = 1,314 kWh/year
Over a 25-year service life, this can translate into more than 32,000 kWh of electricity savings, helping utilities reduce operating costs and carbon emissions.
Industrial Applications of 0.23mm 0.85 0.85 W/kg electrical steel
B23R085 is widely used in industries where energy efficiency and reliability are critical.
Ultra-High Voltage (UHV) Transformers
Its low-loss characteristics make it suitable for long-distance power transmission systems.
Distribution Transformers
B23R085 is commonly used in S13, S15, and other high-efficiency transformer designs deployed in modern urban power grids.
Instrument Transformers
The excellent magnetic characteristics provide stable performance and high measurement accuracy.
Magnetic Shielding Components
The directional magnetic properties of grain-oriented steel also make B23R085 suitable for specialized shielding applications.
Manufacturing And Quality Control
Producing B23R085 requires advanced metallurgical processes and strict quality control.
Secondary Recrystallization
Manufacturers carefully control annealing conditions to develop the ideal Goss Texture ((110)[001]), which provides superior magnetic properties in the rolling direction.
Insulation Coating
A high-resistance phosphate-based coating is applied to prevent electrical contact between laminations and improve stacking performance.
Quality Verification
Each production batch undergoes rigorous testing for:
- Core loss
- Magnetic induction
- Coating adhesion
- Thickness tolerance
- Surface quality
Conclusion
B23R085 has become one of the benchmark materials for modern energy-efficient transformers. Its combination of ultra-low core loss, high magnetic induction, excellent permeability, and proven long-term reliability enables manufacturers to build smaller, quieter, and more efficient transformers.
For transformer manufacturers targeting higher efficiency standards and lower lifecycle costs, B23R085 remains one of the most cost-effective CRGO electrical steel grades available today.
Need a quotation for B23R085 CRGO steel?
Whether you need full coils, slit coils, or customized transformer core materials, GNEE can provide competitive factory pricing, mill test certificates, and fast delivery schedules.
Many customers discover that selecting the right CRGO grade can reduce transformer no-load losses by 10–20% while lowering overall production costs. Contact our team today for a free technical consultation and quotation tailored to your project requirement
Frequently Asked Questions
What Is The Difference Between B23R085 And B23P085?
Both grades have the same thickness and core-loss rating. However, B23P085 is a high-permeability grade that generally offers lower transformer noise and better magnetic performance.
Is B23R085 Suitable For Power Transformers?
Yes. B23R085 is widely used in power transformers, distribution transformers, and energy-efficient transformer cores.
How Does B23R085 Contribute To Energy Efficiency?
Its low core loss reduces the amount of electrical energy converted into heat, improving transformer efficiency and lowering operating costs.
Can B23R085 Reduce Transformer Noise?
Compared with conventional CRGO grades, B23R085 can contribute to lower vibration and noise levels. However, dedicated high-permeability grades such as B23P085 typically provide even better noise reduction.
What Is The Magnetic Induction Of B23R085?
Typical B800 magnetic induction values are 1.88 Tesla or higher, depending on the manufacturer.
Is B23R085 Available In Slit Coils?
Yes. Most major CRGO manufacturers can supply B23R085 in coils, slit coils, and cut laminations according to transformer production requirements.