B20r070 Cold Rolled CRGO Electrical Silicon Steel Mother Coil for Green Electricity
Sep 26, 2025
Leave a message
Cold Rolled CRGO Electrical Silicon Steel Mother Coil Product Description
Mother Coil
Cold rolled grain oriented electrical steel (CRGO) is a specialized type of electrical steel used in the cores of transformers, particularly those for electrical power distribution systems.
Material Composition: CRGO steel is made from silicon (Si) primarily, with very low carbon (C) and phosphorus (P) content. The silicon content is typically around 3%, which helps in creating the necessary magnetic properties.
Grain Orientation: The term "grain oriented" refers to the crystal structure of the steel. During manufacturing, the steel is rolled in a way that aligns the grains in a particular direction, which enhances its magnetic properties in that direction. This alignment is crucial for minimizing energy losses (hysteresis and eddy currents) in transformers.
Thickness: Mother coils of CRGO steel can vary in thickness depending on the manufacturer and customer specifications. Typical thicknesses range from about 0.23 mm to 0.35 mm.
Width: Mother coils come in various widths, often ranging from 600 mm to 1300 mm or more, again depending on customer requirements and the capabilities of the manufacturing facility.
Coil Weight: The weight of a CRGO mother coil can vary significantly depending on its dimensions and thickness. A typical coil might weigh several tons.
Surface Finish: The surface of CRGO steel is usually treated to ensure smoothness and to meet specific electrical and magnetic properties. This can involve processes such as cold rolling, annealing, and insulation coating.
Applications: CRGO steel is primarily used in the production of transformer cores due to its high magnetic permeability, low core loss, and low magnetizing current. It allows transformers to operate efficiently with minimal energy loss.
Standards: CRGO steel typically meets international standards such as ASTM A876 and IEC 60404-8-1.
Packing: Mother coils are usually packed in a way that protects them from physical damage during transportation and storage. This can involve wrapping with protective materials and securing them on pallets.
Cold Rolled CRGO Electrical Silicon Steel specifications
We supply a wide spectrum of grades to cater to your every need: B30P120, B30P105, B30R100, 27QG120, 27QG100, 23Q110, 23QG100, 23QG095, 23RK090, 23RK085, 23QG085, 23RK085, 23QG085, 23RK080, 23RK075, B23R070, 20QG085, 20RK080, 20RK075, B20R070, B20R065,M0H,M1H,M2,M3,M4,M5.23HP75d, 23HP80d, 23HP85d, 23HP90d, 23HP95d, 23HP100, 23HP100d, 27HP100, 27HP110, 27CG110, 27CG120, 30CG120, 30CG130
Each grade is engineered to provide superior performance and reliability.
| Type | Grade | Width | Max Core Loss@P1.7T/50Hz | Lamination Factor(%) | Min Induction@B800 |
| Common Type | 23Q110 | 900-1200mm | 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 | 900-1200mm | 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 | 900-1200mm | 0.70w/kg | 97 | 1.86T |
| B23RK085 | 0.85w/kg | 97.2 | 1.88T | ||
| B27RK085 | 0.85w/kg | 97.5 | 1.89T |
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
1. Raw Material Sourcing
2. Slitting
3. Punching
4. Laminating
5. Core Forming
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.
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
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.
Edison Zhang
CEO
Kelly Zhang
General Manager
Alex Cao
Sales Manager
Industries Served
Automobile Industry
New Energy
Transformer Applications
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