0.27mm M4 cold rolled crgo laminated grain oriented silicon steel sheet for transformer iron core

Sep 28, 2025

Leave a message

Cold rolled grain-oriented silicon electrical steel Product Description


 

0.27mm M4 cold rolled crgo laminated grain oriented silicon steel sheet for transformer iron core

Cold rolled grain-oriented silicon electrical steel (CRGO) is a high-performance magnetic material used primarily in high-efficiency transformers, reactors, and other electrical equipment to enhance performance and reduce energy loss. Through a cold rolling process, its silicon content and crystal structure are aligned in the direction of the rolling, resulting in excellent magnetic permeability and low core losses in that direction.

 

CRGO electrical steel is generally used in transformer enterprises at home and abroad, applied to UHV transformers, high-efficiency transformers, etc.

 

silicon steel sheet Key Characteristics:

  • Silicon Content: Contains 2.9% to 3.5% silicon, which improves its magnetic properties.
  • Grain Orientation: Features a highly directional and regular crystal structure, aligning with the rolling direction. This is known as "Goss texture".
  • High Magnetic Permeability: Easily magnetized in the rolling direction, making it ideal for transformer cores.
  • Low Core Losses: Significantly reduces energy loss in electrical devices, improving efficiency.
  • High Electrical Resistivity: Contributes to lower energy dissipation.

 

Electrical Silicon Steel Manufacturing & Treatment:

  • Cold Rolling:

The process involves cold rolling, which refines the grain structure, ensures a uniform thickness, and enhances the final magnetic properties in the desired direction.

 

  • Secondary Recrystallization:

This treatment promotes the growth of specific crystal orientations, further boosting the material's magnetic capabilities.

 

  • Insulating Coatings:

Insulating coatings are applied to the surface to minimize eddy currents and improve overall insulation, which helps reduce core loss.

 

Electrical Silicon Steel Applications:

  • Transformer Cores:

The primary application for CRGO steel, where its superior magnetic properties enable the construction of more efficient transformers.

 

  • Reactors and Large Motors:

Used in other high-demand electrical components to improve efficiency and reliability.

 

Silicon Electrical Steel Benefits:

  • Increased Efficiency:

By minimizing core losses, CRGO steel makes electrical devices more energy-efficient.

 

  • Reduced Greenhouse Gas Emissions:

Higher energy efficiency in electrical grids helps lower greenhouse gas emissions and supports a sustainable energy transition.

 

  • Enables Renewable Energy:

CRGO steel's contribution to transformer efficiency is crucial for integrating and distributing renewable energy sources reliably.

 

Silicon Electrical Steel specifications

Electromagnetic Property Standard

Type

Thickness(mm)

Grade

Density

(kg/dm³)

Max.core loss

(W.kg)

Min. Magnetic induction

(T)

High magnetic induction type

0.27

27SQG090

0.90

1.89

0.960

27SQG095

0.93

1.89

0.960

27SQG100

0.96

1.89

0.960

27SQG110

1.05

1.88

0.960

Domain refined type

27SQGD080

0.80

1.89

0.960

27SQGD085

0.84

1.89

0.960

27SQGD090

0.87

1.89

0.960

27SQGD098

0.92

1.88

0.960

 

Typical Electromagnetic Property

Type

Thickness

(mm)

Steel grade

 

Max.core loss(W.kg)

Min. Magnetic induction(T)

Min. Laminated factor

50Hz or 60Hz

P1.5/50a

P1.5/60a

P1.7/50

P1.7/60b

J 800

High Magnetic Induction Type

0.27

27SGQ090

0.67

0.88

0.89

1.18

1.91

0.960

27SGQ095

0.69

0.91

0.92

1.22

1.91

0.960

27SGQ100

0.68

0.91

0.95

1.23

1.91

0.960

27SGQ110

0.70

0.93

1.00

1.27

1.90

0.960

Domain Refined Type

27SGQD080

0.61

0.80

0.80

1.06

1.91

0.960

27SGQD085

0.62

0.82

0.83

1.10

1.91

0.960

27SGQD090

0.62

0.84

0.85

1.12

1.91

0.960

27SGQD095

0.64

0.87

0.90

1.16

1.90

0.960

Low noise Type

27SQGD085LN

0.62

0.82

0.83

1.10

1.91

0.960

27SQGD090LN

0.62

0.84

0.85

1.12

1.91

0.960

No Glass Film Type

27SQG120NG

0.93

1.21

1.20

1.57

1.90

0.960

 

Typical Mechanical Properties

Norminal thickness

(mm)

Hardness

Hv1

Tensile strength

(MPa)

Yield strength

(MPa)

Elongation

(%)

Number of bends

(Times)

0.27

195

348

327

11

15

 

 

GNEE Featured Products

Gnee provides premium iron cores to the world. Our cores can be selected in a wide range of materials, shapes, applications, manufacturing techniques, etc., to meet customers' diverse demands. Explore our wide product range now~

Manufacturing Process

 

Raw Material Sourcing

1. Raw Material Sourcing

Slitting

2. Slitting

Punching

3. Punching

Laminating

4. Laminating

Core Forming

5. Core Forming

testing

6. testing

GNEE EC

Founded in 2008 and located in Anyang in China, Gnee Electric is a high-tech enterprise specializing in researching and manufacturing iron core products.
The company currently occupies over 20,000 square meters and employs more than 200 people, including over 80 professionals. After more than 18 years of development, we have built our own magnetic material production base and independently develope, produce, and sell various kinds of iron cores. The common types include silicon steel cores, motor cores, transformer cores, toroidal iron cores, special-shaped cores, custom cores, and others. Our cores are widely applied in different sectors including transformers, motors, mutual inductors, voltage stabilizers, welding machines, magnetic amplifiers, and instrumentation, providing diverse core solutions to global customers.

GNEE EC

30+

Types of Products

18k+

Happy Clients

 

 

 

Why Choose GNEE EC?

 

GNEE EC was founded in 2008, which is a National High-tech Enterprise & Famous Brand Enterprise in China, developing into a professional manufacturer and supplier of high-quality iron cores.

 

18+

Over 18 years of success in the iron core industry;
National High-tech Enterprise & Famous Brand Enterprises in China;

 
 

200+

Over 200 employees;
The R&D team has more than 80 experienced engineers and the production team has more than 100 skilled staffs;

 
 

35+

Annual turnover up to 35 million dollor per year;
Owns many sets of highly automatic winding, annealing, and assembling machines;

 
 

1,000+

Over 1000 customers in domestic and overseas markets;
core Products are exported to more than 70 countries in the world;

 

Gnee Iron Core Factory Overview

Gnee Iron Core Factory
Gnee Iron Core Factory
Gnee Iron Core Factory
Gnee Iron Core Factory
Gnee Iron Core Factory
Gnee Iron Core Factory

Meet Our Sales Manager

 

"The Core of the Iron Core, the Power of Leadership" - See Our Great Decision-Makers Deeply Engaged in the Magnetic Materials Industry.

CEO

Edison Zhang

CEO

General Manager

Kelly Zhang

General Manager

Sales Manager

Alex Cao

Sales Manager

 

 

Industries Served

 
Automobile Industry

Automobile Industry

New Energy

New Energy

Motor Applications
Motor Applications
Transformer Applications

Transformer Applications

modular-1

Our Mission

Strive To Create world-class Iron core brand

With 18 Years of industry experience, we focus on the research, development, and manufacturing of high-quality iron cores for electricity, industrial control, new energy, and automotive markets

Send Inquiry