Horizontal coil packing
Coil packed with its axis horizontal (eye-to-the-side), wrapped and secured for handling and sea transport.
Steel coils · illustrative photo1 / 5Illustrative photography · not the specific product
Electrical Steel · CRGO / GODomain-refined high induction
CRGO Grain-Oriented Electrical Steel — B27R090
Domain-refined, high-induction GO electrical steel coil at 0.27 mm nominal thickness, for low-loss transformer cores. Quoted to your required width, quantity and destination.
- Thickness
- 0.27mm
- Core loss P1.7/50
- ≤ 0.90W/kg
- Induction B8
- ≥ 1.87T
- Width
- 900–1200mm
- Inside diameter
- 508mm
- Density
- 7.65kg/dm³
Reference data: Baosteel GO technical manual · approval required
Overview
Low-loss GO steel for efficient transformer cores.
B27R090 is a domain-refined, high-induction grade of grain-oriented (GO / CRGO) electrical steel. In grain-oriented steel the crystal grains are aligned with the rolling direction, giving low core loss and high permeability when the strip is magnetised along that direction.
Domain refinement further reduces losses, which makes this type of grade a candidate for energy-efficient power and distribution transformer cores. Confirm final grade selection against your own core design and test requirements.
Technical values on this page come from the Baosteel GO electrical steel technical manual and are shown for evaluation. Supplier, final values and availability are confirmed in each quotation.
- Low core loss≤ 0.90 W/kg at 1.7 T, 50 Hz
- High inductionB8 ≥ 1.87 T
- Standard coil format900–1200 mm wide, 508 mm ID
Key facts
Reference data · approval required- Grade
- B27R090
- Family
- Electrical Steel › CRGO / GO
- Type
- Domain-refined high induction (R)
- Nominal thickness
- 0.27 mm
- Supply form
- Coil
- Density
- 7.65 kg/dm³
- Test basis
- GB/T 13789-2008
- Manufacturer
- Baosteel (reference manual)
- Origin
- China
Grade designation
How to read B27R090
Each part of the grade code tells you something about the material. Designation scheme per the Baosteel reference manual.
BPrefixManufacturer prefix
27Thickness×100 → 0.27 mm nominal
RTypeDomain-refined high induction
090Core loss×100 → max 0.90 W/kg at P1.7/50
- GConventional
- PHigh induction
- RDomain-refined HI (this grade)
Specifications
Sample layout · reference data (Baosteel GO manual) · approval requiredElectromagnetic properties
B27R090 · limit values
| Property | Value | Unit | Condition |
|---|---|---|---|
| Nominal thickness | 0.27 | mm | — |
| Max. specific total lossP1.7/50 | ≤ 0.90 | W/kg | 1.7 T, 50 Hz |
| Min. magnetic polarisationB8 | ≥ 1.87 | T | 800 A/m |
| Conventional density | 7.65 | kg/dm³ | — |
| Test basis | GB/T 13789-2008 | R grades | |
P1.7/50 — specific total loss at a peak polarisation of 1.7 T and 50 Hz. B8 — magnetic polarisation at a field strength of 800 A/m. Values are limits listed in the reference manual; per-shipment values are confirmed by test certificate where provided.
Compare GO grades
All CRGO grades| Grade | Type | Thk. (mm) | P1.7/50 (W/kg) | B8 (T) |
|---|---|---|---|---|
| B23R080 | Domain-refined high induction | 0.23 | ≤ 0.80 | ≥ 1.87 |
| B27R090 (this grade) | Domain-refined high induction | 0.27 | ≤ 0.90 | ≥ 1.87 |
| B23P090 | High induction | 0.23 | ≤ 0.90 | ≥ 1.87 |
| B27P095 | High induction | 0.27 | ≤ 0.95 | ≥ 1.88 |
| B30P105 | High induction | 0.30 | ≤ 1.05 | ≥ 1.88 |
| B35P125 | High induction | 0.35 | ≤ 1.25 | ≥ 1.88 |
| B23G110 | Conventional | 0.23 | ≤ 1.10 | ≥ 1.80 |
| B27G120 | Conventional | 0.27 | ≤ 1.20 | ≥ 1.80 |
| B30G120 | Conventional | 0.30 | ≤ 1.20 | ≥ 1.80 |
| B30G130 | Conventional | 0.30 | ≤ 1.30 | ≥ 1.80 |
| B35G135 | Conventional | 0.35 | ≤ 1.35 | ≥ 1.80 |
← Swipe to see all columns →
Equivalent grades · cross-reference
| Reference grade | GB/T (China) | IEC 60404-8-7 | EN 10107 | ASTM A876 | JIS C 2553 |
|---|---|---|---|---|---|
| B27R090 | To be confirmed | To be confirmed | To be confirmed | To be confirmed | To be confirmed |
| B23R080 | To be confirmed | To be confirmed | To be confirmed | To be confirmed | To be confirmed |
| B23G110 | To be confirmed | To be confirmed | To be confirmed | To be confirmed | To be confirmed |
← Swipe to see all columns →
Placeholder layout. Equivalent grades are indicative only and will be published once the client and supplier approve a cross-reference. Always specify the exact grade and standard in your enquiry.
Dimensions & tolerances
Sample layout · reference data (Baosteel GO manual) · approval requiredDimensions, tolerances & packing
Standard dimensions
| Dimension | Unit | Value |
|---|---|---|
| Nominal thicknessRange for GO grades: 0.23 / 0.27 / 0.30 / 0.35 | mm | 0.27 |
| Width | mm | 900–1200 |
| Coil inside diameter (ID) | mm | 508 |
| Coil outside diameter / coil weight | — | On request |
Dimensional & shape tolerances
| Tolerance | Unit | Value |
|---|---|---|
| Thickness0.27 mm (0.23 mm: ±0.02) | mm | ±0.03 |
| Width · trimmed edge | mm | 0 ~ +2 |
| Width · untrimmed edge | mm | 0 ~ +5 |
| Flatness | % | ≤ 1.5 |
| Camberper 2 m length | mm | ≤ 1.0 |
Coil handling · illustrativePacking & labelling
The reference manual describes two standard coil packing arrangements. The packing method, labelling and marking are agreed per order.
Vertical coil packing
Coil packed with its axis vertical (eye-to-the-sky) on a base, wrapped and secured for transport.
- Coil label with grade, dimensions and coil identification
- Moisture-protective wrapping for export shipment
- Special packing or marking requirements on request
Mechanical
Sample layout · reference data (Baosteel GO manual) · approval requiredTypical mechanical properties
Reference only, not guaranteed. Typical values by nominal thickness, shown for engineering orientation. They are not specification limits. The 0.27 mm column applies to B27R090.
| Property | Unit | 0.23 mm | 0.27 mm · this grade | 0.30 mm | 0.35 mm |
|---|---|---|---|---|---|
| Tensile strength | MPa | 352 | 358 | 361 | 364 |
| Yield strength | MPa | 330 | 333 | 336 | 340 |
| Elongation | % | 12 | 12 | 13 | 13 |
| Hardness | HV1 | 200 | 204 | 205 | 206 |
| Lamination factor | % | 96.5 | 97.0 | 97.5 | 98.0 |
← Swipe to see all columns →
Insulating coating
GO steel is supplied with an insulating surface coating. Coating type and requirements are confirmed per order.
On request
Stress-relief annealing
Guidance on stress-relief annealing after cutting or slitting is covered in the reference manual and can be shared with your enquiry.
Guidance on request
Applications
Where B27R090-type grades are used
Application fields listed for GO electrical steel in the reference manual. Confirm suitability against your own design.
01Power & distribution transformers
Low-loss wound and stacked cores for large, medium and distribution transformers.
02Large motors
Magnetic cores for large rotating electrical machines.
03Reactors
Reactors and magnetic amplifiers.
04Voltage regulators
Regulating equipment for power networks.
05Instrument transformers
Current and voltage (mutual) inductors.
Photos are illustrative and do not show client projects.Discuss your application
Documents
Datasheets & technical documents
PDFPending approvalRequest datasheet
Product datasheet — B27R090
Electromagnetic, dimensional and packing data for this grade.
PDFPermission requiredRequest copy
GO electrical steel technical manual (Baosteel)
Manufacturer's technical manual · third-party document, attribution retained.
PDFClient to confirmAsk about certificates
Mill test certificate (sample)
Example certificate layout · issued per shipment where available.
PDFPending approvalRequest document
Packing & labelling specification
Coil packing arrangements, labels and markings.
Related grades
Sample layout · reference data (Baosteel GO manual) · approval requiredCompare similar GO grades
Domain-refined high inductionB23R080CRGO Grain-Oriented Electrical Steel — B23R080
- Thickness
- 0.23 mm
- P1.7/50
- ≤ 0.80
- B8
- ≥ 1.87 T
High inductionB27P095CRGO Grain-Oriented Electrical Steel — B27P095
- Thickness
- 0.27 mm
- P1.7/50
- ≤ 0.95
- B8
- ≥ 1.88 T
High inductionB30P105CRGO Grain-Oriented Electrical Steel — B30P105
- Thickness
- 0.30 mm
- P1.7/50
- ≤ 1.05
- B8
- ≥ 1.88 T
P1.7/50 in W/kg. In this prototype every related grade opens the same detail template.