Products · Grain-Oriented
CRGO Steel — Cold-Rolled Grain-Oriented Electrical Steel (CGO & Hi-B)
CRGO steel is our core product family: cold-rolled grain-oriented silicon steel for transformer cores, rolled from 0.18 to 0.35 mm in conventional (CGO) and high-permeability (Hi-B) grades. It covers GB grades 23Q110 through 35Q155 and their Hi-B equivalents, cross-referenced to AISI M4–M6, EN 10107 and JIS C 2553 — supplied as coil, sheet or precision slit strip with C5 or C6 insulation and a mill test certificate.
Supplied forms
Coil, sheet or slit strip
CRGO is stocked as master coil and processed in-house to your order — cut to length or slit to width on precision lines.
Coil
Master and mill-edge coils, around 5 t, wound to your inner diameter and coil weight.
Sheet
Cut-to-length sheet in standard and custom lengths, ready for stamping or shearing.
Slit strip
Precision slit to width with tight tolerance, for stamping and lamination lines.
By thickness & grade
The CRGO range, across four standard systems
Family-level reference values. Thin Hi-B grades sit at the low-loss end; thicker conventional grades at the cost-balanced end. P1.7/50 = core loss at 1.7 T, 50 Hz (W/kg); B8 = induction at 800 A/m (T).
| Thickness | GB grade | AISI | EN 10107 | JIS C2553 | Core loss P1.7/50 | Induction B8 | Best for |
|---|---|---|---|---|---|---|---|
| 0.18 mm | 18QG075 Hi-B, domain-refined | M-2 (≈) | M075-18P | 18ZDKH075 | ≤ 0.80 W/kg | ≥ 1.90 T | Ultra-low-loss and higher-frequency cores |
| 0.23 mm | 23QG085 Hi-B | M-3 (≈) | M085-23P | 23ZH85 | ≤ 0.90 W/kg | ≥ 1.90 T | Highest-efficiency power transformer cores |
| 0.23 mm | 23Q110 Conventional | M4 (≈) | M110-23N | 23G110 | ≤ 1.05 W/kg | ≥ 1.85 T | High-efficiency small & medium cores |
| 0.27 mm | 27QG095 Hi-B | M-3 (≈) | M095-27S | 27ZH95 | ≤ 1.00 W/kg | ≥ 1.89 T | Premium distribution & power cores |
| 0.27 mm | 27Q120 Conventional | M5 (≈) | M120-27N | 27G120 | ≤ 1.20 W/kg | ≥ 1.83 T | General-purpose power & distribution cores |
| 0.30 mm | 30QG110 Hi-B | M-4 (≈) | M110-30S | 30ZH110 | ≤ 1.15 W/kg | ≥ 1.88 T | Large power cores with low no-load loss |
| 0.30 mm | 30Q130 Conventional | M6 (≈) | M130-30N | 30G130 | ≤ 1.35 W/kg | ≥ 1.80 T | Larger cores, cost-balanced |
| 0.35 mm | 35Q155 Conventional | M6 (≈) | M150-35N | 35G155 | ≤ 1.55 W/kg | ≥ 1.78 T | Large, lower-frequency cores and reactors |
Single-grade specifications are issued on the mill test certificate. Send your target datasheet and we confirm the closest match before quoting.
Technical & physical properties
Common to the CRGO range
By application
Matched to your transformer core
Power Transformers
Hi-B and M4/M5 grades for large power cores where no-load loss dominates lifetime cost.
Distribution Transformers
M5/M6 and 27QG095 grades balancing core loss against material economics for volume production.
Reactors
Conventional CRGO for shunt and series reactor cores under continuous magnetizing current.
Instrument Transformers
Tight-tolerance CRGO for CT/VT cores that must hold a stable accuracy class.
Grade equivalents
CRGO grades at a glance
Working from a European or Japanese spec? Match it to the Chinese equivalent below, or send a datasheet for confirmation.
- 23QG085 (GB, Hi-B) ≈ M-3 (AISI) ≈ M085-23P (EN) ≈ 23ZH85 (JIS) · 0.23 mm
- 23Q110 (GB) ≈ M4 (AISI) ≈ M110-23N (EN) ≈ 23G110 (JIS) · 0.23 mm
- 27Q120 (GB) ≈ M5 (AISI) ≈ M120-27N (EN) ≈ 27G120 (JIS) · 0.27 mm
- 30Q130 (GB) ≈ M6 (AISI) ≈ M130-30N (EN) ≈ 30G130 (JIS) · 0.30 mm
- 30QG110 (GB, Hi-B) ≈ M-4 (AISI) ≈ M110-30S (EN) ≈ 30ZH110 (JIS) · 0.30 mm
Equivalence is a working guide, not full interchangeability — confirm against actual test data before design release.
How we work
From enquiry to delivered coil
Send your spec
Thickness, grade, width and coating, or upload a drawing.
Quote in 24h
Pricing and availability within one business day.
Free samples
Test core loss and stampability, usually within a week.
Production & QC
Rolled, slit and tested to grade, with a mill certificate.
Export delivery
Moisture-proof packing and ocean freight to your port.
Packaging & export
Seaworthy packing to any port
Coil packaging
Moisture-proof kraft paper and VCI wrap, banded with edge and coil-eye protection.
Sheet & strip packaging
Strapped on wooden pallets or steel racks, corner-protected for forklift handling.
Container loading
Coils secured with dunnage and lashing, by container or in bulk for break-bulk.
FAQ
Sourcing CRGO from us
What is CRGO steel?
CRGO — cold-rolled grain-oriented silicon steel — has its grain structure aligned to the rolling direction, giving very low core loss and high permeability along that axis. It is the standard core material for power and distribution transformers operating at 50/60 Hz.
What is the difference between conventional CGO and Hi-B CRGO?
Both are grain-oriented. Hi-B (high-permeability) grades have sharper grain alignment and often laser or mechanical domain refinement, so at the same thickness they show lower loss and higher B8 — at a higher price. CGO covers the majority of cost-sensitive designs.
Which thickness should I choose?
Thinner gauges (0.18–0.23 mm) cut no-load loss and suit high-efficiency or higher-frequency cores; thicker gauges (0.30–0.35 mm) favour material economics and larger, lower-frequency cores. Core size and efficiency target decide it — send both and we advise.
How do M4/M5/M6 relate to GB grades?
As a working guide: M4 ≈ 23Q110, M5 ≈ 27Q120, M6 ≈ 30Q130/35Q155. These are close equivalents, not identical specs; we confirm against your datasheet before quoting.
Do you supply coil, sheet or slit strip?
All three — master or mill-edge coils, cut-to-length sheet, and precision slit strip to your width.
What surface coating and tolerances do you offer?
Standard C5 inorganic coating; C6 inorganic-organic on request. Thickness tolerance ± 4% of nominal; width tolerance ± 1.0 mm on slit strip.
Can you provide laser-scribed / domain-refined CRGO?
Yes, for the thinner Hi-B grades where further loss reduction is needed. Specify the target P1.7/50 and we quote the matching grade.
Can you match EN, JIS or AISI grades?
Yes — cross-reference to GB, EN 10107, JIS C 2553 and AISI is provided. Send the datasheet for confirmation.
What are your minimum order and lead time?
MOQ depends on grade, thickness and width; common gauges are often available within days, non-standard widths typically need several weeks. Free samples usually ship within one week.
What standards and certifications apply?
ISO 9001 and IATF 16949 production; material to GB, EN, JIS or AISI; RoHS/REACH compliance; mill test certificate with every shipment.
Why buyers choose Zhongxin
Mill-grade CRGO, export-ready service
Need CRGO steel for a specific core design?
Send your thickness, grade and width — or your target core loss and induction — and our engineers will confirm the grade and send a quote within 24 hours.
Request a quote → Ask for free samples
