GB Q Series CRGO Coil | 23Q080 23Q085 27Q095 Cold Rolled Grain Oriented Silicon Steel Coil

Stable low core loss performance for energy-saving transformer cores
Strict GB/T 2521 standard compliance for domestic & overseas power projects
Available in 0.23/0.27/0.30/0.35mm standard thickness
Supports precision slitting down to 20mm width with tight tolerance
C5/C6 RoHS lead-free insulation coating options available

Product Overview

GB Q Series CRGO (Cold Rolled Grain Oriented Silicon Steel Coil) is China national standard grain-oriented electrical steel, widely used for conventional distribution transformers, dry-type transformers and low voltage reactors.

Common commercial grades: 23Q080,23Q085,23Q090,27Q095,27Q100,30Q120,35Q135,35Q145,35Q155. The silicon content is controlled at 3.20–3.45%, delivering reliable magnetic performance with consistent grain orientation.

We provide mother coil width 700–1250mm, precision slitting service to minimum 20mm width with ±0.1mm tolerance. Multiple insulation coating choices: C5 general inorganic coating, C6 high insulation coating, RoHS compliant lead-free coating. Downstream processing services: flattening, cut-to-length, EI lamination stamping, toroidal core winding, stress-relief annealing. Every shipment comes with Mill Test Certificate (MTC).

CRGO Coil

Chemical & Mechanical Property Snapshot

Grade	C (Carbon) Max %	Si (Silicon) %	Mn Max %	P Max %	S Max %	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation A50 (%)	Magnetic Core Loss P17/50 (W/kg)
23Q080	0.05	3.20–3.45	0.10	0.025	0.02	340	470	≥10	0.80
23Q085	0.05	3.20–3.45	0.10	0.025	0.02	330	460	≥10	0.85
27Q095	0.05	3.20–3.45	0.10	0.025	0.02	325	455	≥11	0.95
30Q120	0.05	3.20–3.45	0.10	0.025	0.02	310	440	≥12	1.20
35Q135	0.05	3.20–3.45	0.10	0.025	0.02	305	435	≥12	1.35

Detailed Technical Specifications

Item	Specification
Product	GB Q Series Cold Rolled Grain Oriented Silicon Steel Coil (CRGO)
Included Grades	23Q080,23Q085,23Q090,27Q095,27Q100,30Q120,35Q135,35Q145,35Q155
Material Type	Grain Oriented Electrical Silicon Steel
Applicable Standards	GB/T 2521.2-2025, GB/T 2522, IEC 60404-8-7
Standard Thickness	0.23 mm,0.27 mm,0.30 mm,0.35 mm
Customized Thickness	Down to 0.18mm
Mother Coil Width	700–1250 mm
Precision Slitting Width	Down to 20 mm
Slitting Width Tolerance	±0.1 mm
Standard Coil ID	508 mm (20 inch)
Customized Coil ID	610 mm
Single Coil Weight	2–8 tons
Coil Splitting	Available per order
Insulation Coatings	C5 general inorganic coating; C6 high-insulation coating; RoHS lead-free coating
Available Processing	Flattening & cut-to-length, EI lamination stamping, toroidal core winding, stress-relief annealing, laser cutting
Main Applications	Distribution transformers, dry-type transformers, instrument transformers, low voltage reactors
Quality Documentation	Mill Test Certificate (MTC)
MOQ	5 Ton
Payment Terms	T/T, L/C at Sight
Delivery Time	7–15 working days after receiving deposit
Package	Waterproof paper + galvanized steel strap + seaworthy export wooden pallet

Product Comparison Table

Specification	23Q080	23Q085	27Q095	30Q120	35Q135
Thickness	0.23mm	0.23mm	0.27mm	0.30mm	0.35mm
Core Loss P17/50	0.80 W/kg	0.85 W/kg	0.95 W/kg	1.20 W/kg	1.35 W/kg
Key Feature	Ultra-low loss thin gauge	Low loss 0.23mm grade	Balanced cost & magnetic performance	Cost-effective general grade	Economical thick gauge
Typical Application	High efficiency small distribution transformer	Energy saving dry type transformer	Medium distribution transformer	General power reactor	Low cost power transformer
Coating Option	C5/C6/RoHS Lead-free	C5/C6/RoHS Lead-free	C5/C6/RoHS Lead-free	C5/C6/RoHS Lead-free	C5/C6/RoHS Lead-free

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

Photovoltaic Inverter Energy Storage Transformer, Wind Power Box Transformer, High-speed rail Traction Transformer

Transformer Voltage Current Metering Transformer Reactor Core

Military Special Power Supply Excitation Core of medical nuclear Magnetic Equipment

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What is GB Q series CRGO silicon steel used for?

GB Q series CRGO grain oriented silicon steel is mainly used for distribution transformers, dry-type transformers, instrument voltage/current transformers and low voltage reactor magnetic cores.

What is the difference between 23Q080 and 35Q135?

23Q080 is thinner (0.23mm) with much lower core loss for high efficiency transformers. 35Q135 is 0.35mm thicker grade with higher core loss, more economical for common low-cost transformer projects.

Can we slit GB Q series CRGO coil into narrow strips?

Yes, precision slitting service available, minimum slit width down to 20mm with ±0.1mm tight tolerance.

What insulation coating options for Q series CRGO?

C5 general inorganic coating, C6 high insulation coating, RoHS compliant lead-free environmental coating.

Can you provide MTC for GB Q series CRGO coil?

Yes, each batch is supplied with full Mill Test Certificate including chemical composition, mechanical and magnetic test data.

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GB Q Series CRGO Coil | 23Q080 23Q085 27Q095 Cold Rolled Grain Oriented Silicon Steel Coil