Cold Rolled Grain Oriented (CRGO) steel coil represents a specialized electrical steel product engineered for exceptional magnetic properties in specific directions. Manufactured through a precise cold rolling process followed by critical annealing, this material develops a distinct grain structure that aligns parallel to the rolling direction.
The production process begins with carefully selected steel slabs that undergo hot rolling, followed by cold reduction to achieve the desired thickness. What sets CRGO apart is the subsequent annealing in a controlled atmosphere that promotes grain growth orientation. This meticulous manufacturing approach results in steel with superior magnetic characteristics when magnetized along the rolling direction.
Key Technical Advantages of CRGO Steel Coils
1.Directional Magnetic Properties: The oriented grain structure delivers up to 30% better magnetic flux density in the rolling direction compared to non-oriented electrical steels.
2.Reduced Core Losses: CRGO steelย exhibits remarkably low hysteresis and eddy current losses, with typical core loss values ranging from 0.9-1.5 W/kg at 1.7T/50Hz.
3.Enhanced Efficiency: Transformers using CRGO steelย typically achieve 97-99% energy efficiency, significantly reducing operational costs.
4.Improved Permeability: The material demonstrates high permeability in the rolling direction, often reaching 1500-1800 under standard operating conditions.
Industrial Applications and Use Cases
CRGO steel coils serve as the backbone of electrical power distribution systems, with primary applications including:
Power Transformers: Large power transformers (50MVA and above) particularly benefit from CRGO’s directional properties.
Distribution Transformers: Medium-capacity transformers (10-50MVA) utilize CRGO for improved efficiency.
Specialty Electrical Equipment: Certain types of reactors, generators, and high-efficiency motors incorporate CRGO components.
Runfei’s CRGO Steel Coil Solutions
Runfei Steel, based in Tianjin, China, manufactures premium CRGO steel coils that meet multiple international standards including AISI, ASTM, BS, DIN, GB, and JIS. Our production facility combines advanced rolling technology with strict quality control measures to deliver:
Consistent Quality: Every coil undergoes rigorous testing for magnetic properties, surface quality, and dimensional accuracy.
Custom Solutions: Available in various thicknesses (typically 0.23mm to 0.35mm) and widths to meet specific application requirements.
Global Compliance: Our products carry ISO 9001, SGS, and RoHS certifications, ensuring worldwide acceptability.
Why Choose Runfei for Your CRGO Needs?
1.Technical Expertise: Our engineering team possesses deep knowledge of electrical steel production and applications.
2.Quality Assurance: We implement comprehensive testing protocols including Epstein frame testing for magnetic properties.
3.Supply Chain Reliability: Flexible packaging options and efficient logistics ensure timely global delivery.
4.Customer-Centric Approach: From small trial orders to large volume contracts, we adapt to your procurement needs.
For power equipment manufacturers seeking high-performance electrical steel solutions, Runfei’s CRGO coils offer the perfect balance of technical superiority and cost-effectiveness. Contact our team today to discuss how our products can enhance your transformer efficiency and performance.
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