What is Cold Rolled Grain Oriented Steel?
CRGO is the acronym for Cold Rolled Grain Oriented Steel. A material that is mainly used in the core of a transformer. When used it gives the transformers and other electrical devices a strong magnetic core.
CRGO steel was first introduced to make the core of transformers in the 1940s. Almost straight away it was used to replace the previous hot-rolled steels by the 1950s. The production of Cold Rolled Grain Oriented Steel increased and by 1995 it was widely accepted globally and fast became the norm.
GNEE (Tianjin) Multinational Trade Co.,Ltd
GNEE Steel, established in 2008, is a leading manufacturer and supplier of diverse steel products in China. Our main products include hot/cold rolled steel, galvanized steel, galvalume steel, silicon steel,transformer,pre-painted steel, and stainless steel in coil, strip, sheet, plate, tube, bar, and so on.
We GNEE Steel will conduct various tests on the products, such as punching test, bending test, coating thickness test, etc. We also accept third-party quality inspections, such as SGS, ISO9001-2008, BV, CE, CCIC commodity inspection, etc. In addition, we can also provide deep processing services, such as cutting, slitting, profiling, punching, bending, etc.
Cold-rolled grain-oriented steel, also known as cold-rolled transformer steel, is an important ferrosilicon alloy used in the transformer (core) manufacturing industry1. Its production process is complex and the manufacturing technology is strict. It is mainly divided into two categories: common oriented silicon steel (CGO) and high magnetic induction oriented silicon steel (HiB). Let me explain these types and characteristics in detail.
Commonly oriented silicon steel (CGO): The grains of this silicon steel sheet are non-oriented and are usually used in the cores of motors or welding transformers. Its thickness is usually 0.30 or 0.35 mm, and it is made by pickling, cold rolling and annealing. Compared with hot-rolled silicon steel strips, cold-rolled oriented thin silicon steel strips have the characteristics of smooth surface, uniform thickness, high stacking coefficient, and good punching performance. They have higher magnetic induction and lower iron loss than hot-rolled silicon steel strips. Using cold strip instead of hot-rolled strip to manufacture motors or transformers can reduce its weight and volume by 0% to 25%. If cold-rolled oriented tape is used, the performance will be better, the power consumption of the transformer can be reduced by 45% to 50%, and the working performance of the transformer will be more reliable.
High magnetic induction oriented silicon steel (HiB): This silicon steel sheet also has grain orientation, but its performance is superior. In the rolling direction, the iron loss value is the lowest, the magnetic permeability is the highest, and it has a high magnetic induction value under a certain magnetizing field. The application range of HiB silicon steel includes cores of power transformers, pulse transformers and magnetic amplifiers.
Manufacturing Process of CRGO Steel
The production of CRGO steel involves a series of complex manufacturing steps. It begins with the melting of raw materials like iron ore in an electric furnace. Once melted, the molten steel is cast into thin slabs and then rolled multiple times under controlled conditions. The rolling process aligns the grains parallel to the rolling direction, imparting the unique grain orientation essential for the improved electrical properties of the final product. Additionally, the steel undergoes annealing, a heat treatment process that further enhances its magnetic properties. The end result is a highly efficient electrical steel ready to be utilized in various power applications.
Products Parameter
| Product Name | Cold Rolled Grain Oriented Steel | |||
| Standard | B23G110, B27G120, B35G155, B23R080-B27R095 | |||
| Thickness | 0.23mm-0.35mm | |||
| Width | 20mm-1250mm | |||
| Length | Coil Or As Required | |||
| Technique | Cold Rolled | |||
| Surface Treatment | Coated | |||
| Application | Widely used in transformers, generators, various household motors and micro-motors, etc. | |||
| Special Use | Silicon Steel | |||
| Sample | For Free （Within 10 KG） | |||
Features Of CRGO Cold Rolled Grain Oriented Steel
FEATURE 01
Low iron damage
FEATURE 02
High permeability
FEATURE 03
Smooth surface and uniform thickness
Properties of CRGO Cold Rolled Grain Oriented Steel
High magnetism:CRGO cold rolled grain oriented steel has great magnetic properties in the direction of rolling. This increased magnetism is because, in grain-oriented silicon steel, the overall magnetic properties of the material are dependent on those of the individual grains.
This magnetism confines and guides the magnetic field in the transformers. Therefore less magnetizing current is used to magnetize this steel.
High resistivity:Another important property of CRGO cold rolled grain oriented steel is its high resistivity levels. When silicon is added to the steel, it increases its resistivity which is otherwise quite low.
This high resistivity then reduces the core losses by minimizing the eddy current components there. Thus, the overall transformer working gets optimized.
High mechanical elasticity:Additionally, CRGO cold rolled grain oriented steel offers exceptionally high mechanical elasticity. So when it is used in the core of transformers or in any other motor or component, they add to their life. Mechanical elasticity helps when the object comes under strain, thereby allowing it to retain its shape.
Reduced magnetostriction:Magnetostriction is an important property as it helps in the conversion of electrical energy into mechanical, which is what transformers do. But high magnetostriction leads to high vibration levels. So, raising the silicon content in the steel helps lower magnetostriction, although it can’t be eliminated completely.
High lamination factors:Another important property of CRGO cold rolled grain oriented steel is that it offers high lamination factors. CRGO laminations help with minimizing eddy currents and hysteresis losses in transformers.
When a transformer’s core is laminated with CRGO cold rolled grain oriented steel material parallel to the magnetic field, it controls the induced electromagnetic flux and eventually the eddy currents.
Low power losses:As the CRGO cold rolled grain oriented steel offers high permeability, therefore it preserves power. And we know that an efficient transformer’s core should ideally allow low power losses. Therefore, cold-rolled grain-oriented steel is used to make the transformers’core.
Reduced curie temperature:As we know that pure iron has a high curie temperature. So, if transformed into an alloy by adding silicon contents in it, the curie temperature of steel can be reduced.
So, in the case of transformers and motors, it is important to keep the temperature below curie temperature. This can help activate spontaneous magnetism which is an essential element of transformers.
cold rolled grain oriented steel advantages
Enhanced Energy Efficiency
The primary advantage of CRGO cold rolled grain oriented steel lies in its ability to significantly enhance energy efficiency in power applications. Its unique grain-oriented structure minimizes core losses, reducing energy wastage and enabling more reliable and sustainable power systems.
01
Cost Savings
Due to higher energy efficiency, power systems using CRGO cold rolled grain oriented steel experience reduced operating costs. The lower energy losses translate into cost savings for end-users and contribute to a greener economy through reduced energy consumption.
02
Environmental Impact
The use of CRGO steel in power applications plays a vital role in reducing greenhouse gas emissions. By optimizing energy conversion and minimizing energy losses, CRGO cold rolled grain oriented steel helps mitigate the carbon footprint associated with electricity generation and consumption.
03
Reliability and Durability
The excellent magnetic properties of CRGO steel make power systems more reliable and durable. With reduced core losses, transformers and motors operate at lower temperatures, minimizing wear and tear and increasing their lifespan.
04
cRGO Cold rolled grain oriented steel application areas
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Transformers:Transformers play a crucial role in power transmission and distribution systems. CRGO steel is extensively used in transformer cores due to its exceptional magnetic properties. The grain-oriented structure of CRGO steel reduces core losses, including eddy current and hysteresis losses, making transformers more energy efficient. This translates into reduced power consumption and minimized environmental impact.
Electric Motors:Electric motors are an integral part of numerous industrial processes. By employing CRGO steel in motor cores, manufacturers can achieve higher energy efficiencies. The improved electrical properties of CRGO steel reduce losses during power conversion, resulting in improved motor performance and reduced energy consumption.
Renewable Energy Systems:In the era of clean energy, renewable power generation systems are gaining momentum. CRGO steel finds immense application in power generating systems like wind turbines and solar inverters. The utilization of CRGO steel in the core components of such systems ensures optimal energy conversion, thus maximizing power generation from renewable sources.
Power Transmission Lines:Efficient power transmission is crucial to address the ever-increasing energy demand. CRGO steel wires and cables are extensively used in power transmission and distribution networks. The low core loss and high permeability of CRGO steel cables minimize energy losses during transmission, enabling efficient power distribution over long distances.
Automotive Applications:With the electrification of vehicles, CRGO steel has also found its way into automotive applications. Electric vehicle motors utilize CRGO steel in their cores to enhance overall efficiency and extend the range of electric vehicles. By reducing energy losses, CRGO steel contributes to increased mileage and improved sustainability in the transportation sector.
Products Display
GNEE Steel, established in 2008, is a leading manufacturer and supplier of diverse steel products in China. Our main products include hot/cold rolled steel, galvanized steel, galvalume steel, silicon steel,transformer,pre-painted steel, and stainless steel in coil, strip, sheet, plate, tube, bar, and so on.
GNEE Steel is a leading international manufacturer of steel products. We provide raw materials, semi-finished and finished steel products for construction and architecture, home appliance, furniture, automobile, machinery manufacturing, advertising, and other industries. At GNEE Steel, there is a wide range of surface treatment methods, coating or painting types, base metal, steel grades, sizes, colors or patterns, and designs to meet different application needs. We also have some new materials, like nano-coated steel, to better meet your requirements.
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FAQ
Q: What is cold-rolled grain oriented steel?
Q: What is grain-oriented steel?
Q: Why is CRGO used in transformers?
Q: What are the advantages of CRGO steel?
Q: What are the different types of CRGO steel?
- The early grades of steel were known as M7(0.7watts /lb at 1.5T/60Hz) and M6(. ...
- Similarly, M5 M4 and M3 grades were developed in the late sixties.
- A new material called Hi-B has a remarkable degree of orientation and is 2 - 3 grade better than conventional CRGO steel products.
Q: What are the applications of CRGO?
Q: What is the manufacturing process of CRGO steel?
Q: What is the silicon content of CRGO steel?
Q: What is grain oriented steel used for?
Q: Which of the following is the advantage of using CRGO steel in transformers?
Henan GNEE Electric Co., Ltd. is well-known as one of the leading cold rolled grain oriented steel manufacturers and suppliers in China. If you're going to buy customized cold rolled grain oriented steel made in China, welcome to get pricelist from our factory. Quality products and low price are available.
Oriented Silicon Steel, 20QG080 0 20mm Cold Rolled Oriented Electrical Steel Coil, Oriented Silicon Steel Coil