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What is CRGO Silicon Steel?
Cold-rolled grain-oriented (CRGO) silicon steel is a unique steel-silicon alloy designed specifically for making iron cores in transformers, generators, and large electric motors. It stands out for its excellent magnetic permeability, low core losses, and top-notch performance in magnetic applications.
CRGO Manufacturing Process
- Cold Rolling:
The Thickness：0.23 mm to 0.35 mm
- Annealing:
The material is annealed at high temperatures to develop an aligned grain structure, enhancing magnetic properties for optimal efficiency.
- Insulation Coating:
A thin insulation layer is applied to reduce eddy current losses and improve inter-laminar insulation, critical for transformer core performance.
Key Properties of CRGO Steel
- High Magnetic Permeability: Ensures efficient magnetic flux conduction.
- Low Core Loss: Reduces energy lost as heat, making it ideal for energy-efficient transformers and motors.
- Superior Surface Quality: Enhances performance and reliability in demanding environments.
Applications of CRGO Silicon Steel
Transformers:
Used in both power and distribution transformers to minimize energy losses.
Generators:
Improves efficiency and performance in large-scale power generation.
Large Electric Motors:
Ensures smooth operation and reduced power consumption.
CRGO Steel Grades and Their Importance
CRGO steel is classified based on core loss, magnetic flux density, and thickness. Popular grading systems include ANSI (M Grades), IEC (C Grades), and JIS standards. Lower-grade numbers, like M3, indicate better efficiency but come with a higher cost.
Key Parameters:
|
Core Loss (W/kg) |
Magnetic Flux Density |
Thickness: |
Silicon Content |
|
65/70/75/80/85/90/95 100/105/110/120 |
1.7 -2.0 Tesla |
0.23--0.3 |
3% |
CRGO Steel Grades and Their Properties
|
Grade |
Iron Loss (W/kg) |
Thickness (mm) |
Use |
|
M2 (High-Efficiency) |
0.90 – 1.10 |
0.23 – 0.27 |
Ideal for top transformers requiring high efficiency. Higher cost but reduces long-term expenses. |
|
M3 |
1.10 – 1.30 |
0.23 – 0.27 |
Used in power and distribution transformers with moderate efficiency needs. |
|
M4 |
1.30 – 1.50 |
0.27 – 0.30 |
Suitable for medium transformers, balancing cost and efficiency. |
|
M5 |
1.50 – 1.70 |
0.30 |
Perfect for budget-friendly projects with acceptable performance. Common in distribution transformers. |
|
M6 (Low-Efficiency) |
1.70 – 1.90 |
0.35 |
An economical option, suitable for less demanding applications. |
Why CRGO Grades Matter
- Energy Efficiency:
Choosing lower-loss grades reduces transformer no-load losses and improves energy savings.
- Operational Savings:
While higher-grade CRGO costs more upfront, it lowers energy costs over the equipment's lifespan.
Promisteel's CRGO Silicon Steel: The Promisis® Advantage
Promisteel, a global leader in CRGO silicon steel, offers premium products under its Promisis® brand, specifically designed for transformer manufacturing.
Advantages of Choosing Promisis®:
- High Magnetic Permeability: Ensures superior magnetic flux conduction.
- Low Core Loss: Reduces energy wastage in transformer cores.
- Custom Thickness and Dimensions: Tailored to meet customer needs.
For inquiries about CRGO silicon steel grades, specifications, and customization options, contact Promisteel now!
Contact us now to get a quotation
