Grain-Oriented Electrical Steel Manufacturer

Longbank is a professional manufacturer of grain-oriented electrical steel for inductors, transformers, and other applications. We are manufacturing a variety of high-quality grain-oriented electrical steel to meet your business needs.

  • Various grades and insulation coating types are available
  • High-quality at a favorable cost
  • On-time delivery guaranteed
  • High permeability grain-oriented electrical steel

Longbank Grain-Oriented Electrical Steel

The grain-oriented electrical steel is an electrical steel that has about 3% of silicon level. It is produced with outstanding magnetic properties in one direction or in the rolling direction. The reason for their excellent magnetic properties in one direction is due to their crystal structure wherein the grains are well-aligned.

Grain-oriented electrical steel is commonly used in the production of cores for inductors, generators, HVDC or high-voltage direct current transmission systems, magnetic shields, reactors, and other applications that require low core losses and high permeability under high flux densities. It can also be used for different types of transformers such as high-efficiency stacked core transformers, distribution transformers, power transformers, and many more.

If you have questions regarding Longbank grain-oriented electrical steel, please do not hesitate to contact us!

Grain-Oriented Electrical Steel Series

Cold Rolled Grain-Oriented Silicon Electrical Steel

Th cold rolled grain-oriented silicon electrical steel is commonly used for micro-motors, numerous household motors, generators, transformers, and many more. They have low iron damage, high permeability, uniform thickness, and smooth surface.

Ultra-Thin Grain-Oriented Electrical Steel

The ultra-thin grain-oriented electrical steel has high magnetic induction, stable performance, high magnetic permeability, and low iron loss value in their rolling direction. They are commonly used for different types of transformer cores.

29 Gauge Cold Rolled Grain-Oriented Electrical Steel

The 29 gauge cold rolled grain-oriented electrical steel is widely used in machinery manufacturing, home appliances construction, container manufacturing, and so on. It has high strength, low core loss, and excellent workability.

0.3mm Cold Rolled Grain-Oriented Electrical Steel

The 0.3mm thick cold rolled grain-oriented electrical steel can be used in distribution transformers, audio output transformers, large power transformers, and other transformers. It is featuring high magnetic sensitivity, low core loss, uniform thickness, and a smooth surface.

0.5mm Cold Rolled Grain-Oriented Electrical Steel

The 0.5mm thick cold rolled grain-oriented electrical steel is commonly used for the lamination for electric motors, household motors, transformer cores, and more. It has a lot of features such as high saturation magnetic flux density, low iron loss, and excellent lamination factor.

Transformer Cold Rolled Grain-Oriented Electrical Silicon Steel

The transformer cold rolled grain-oriented electrical silicon steel can be used for producing a variety of transformer cores. It is widely used in power transformers distribution transformers, and more. It is used since it has high permeability, low hysteresis, low core losses, and more.

Grain-Oriented Electrical Steel by Grades (5)

  • M4 Grain-Oriented Electrical Steel

    The M4 grain-oriented electrical steel is commonly used for transformer cores, motor laminations, etc. It has well magnetic sensibility, well antistatic coating, high lamination factor, and smooth surface. The M4 grades have about 0.27 mm of thickness.

  • M5 Grain-Oriented Electrical Steel

    Longbank M5 grain-oriented electrical steel has features such as high magnetic sensitivity, low iron damage, and uniform thickness. It can be used for different types of reactors, transformers, and other electrical products. Also, its thickness is about 0.30 mm thick.

  • M2 Grain-Oriented Electrical Steel

    The M2 grain-oriented electrical steel is ideal for armatures, large generators, wound cores, and so much more. It has high magnetic flux density, high stacking factor, and reduced magnetostriction. M2 grades are usually about 0.18 mm thick.

  • M3 Grain-Oriented Electrical Steel

    The M3 grain-oriented electrical steel has a thickness of 0.23 mm. It is commonly used for reactors, distribution transformers, power transformers, and more. Also, it is featuring low iron damage, excellent permeability, and low core loss.

  • M6 Grain-Oriented Electrical Steel

    The M6 or 0.35 mm thick grain-oriented electrical steel can be used for the production of transformer cores, compressor motors, rectifiers, electric machinery, and many more. It is featuring high magnetic induction, magnetic permeability, excellent processing performance.

Longbank Grain-Oriented Electrical Steel Advantages

High Magnetic Permeability
High Magnetic Permeability

Longbank grain-oriented electrical steel has a high magnetic permeability feature that is very essential for the production of cores. They have high permeability or the ability to support magnetic fields.

Low Core Loss
Low Core Loss

The grain-oriented electrical steel has a low core loss that is very important for the core of transformers. Their low iron loss makes the transformers and reactors save more energy.

Low Magnetostriction
Low Magnetostriction

The grain-oriented electrical steel has low magnetostriction or a low probability to expand and shrink in magnetic fields.

Excellent Lamination Factor
Excellent Lamination Factor

Longbank grain-oriented electrical steel has an excellent lamination factor or stacking factor which will result in compact designs of transformer cores. It will also lead to less material needed.

Longbank Grain-Oriented Electrical Steel Production

There are a lot of processes when manufacturing the grain-oriented electrical steel. The following are some of the manufacturing processes:

BOF or basic oxygen furnace steelmaking – The basic oxygen furnace steelmaking is a process that involves blowing oxygen via a lance to transform the molten pig iron into steel.

Secondary refining & continuous casting – The secondary refining is a process conducted at a separate station before the hot metal desulfurization. After this process, the continuous casting will be done to solidify the steel.

Slab reheating – The slab reheating will be done to form and increase the texture.

The grain-oriented electrical steel will be then hot rolled and annealed at the temperature of 900 °C. After that process is cold rolling. Cold rolling is useful to form a sharp texture during the secondary recrystallization annealing.

Other processes of manufacturing the grain-oriented electrical steel also includes decarburization annealing and heat flattening coating.

Grain-Oriented Electrical Steel
Grain-Oriented Electrical Steel Production

Longbank Grain-Oriented Electrical Steel Surface Coatings

The grain-oriented electrical steel can be added with insulating coatings or finishes on their surface to improve their resistance to rust, oxidation, abrasion, and more. There are a lot of different types of insulating coatings. However, there are 2 types of coatings that are mostly used for the grain-oriented electrical steel such as:

C-2 Coating – The C-2 coating is an inorganic insulating coating that forms a glass-like film on the surface of the steel during the hydrogen annealing process. This coating consists of silicates and MgO or magnesium oxide. It can resist the temperatures during normal stress relief annealing. Also, it has enough resistance to interlamination for wound cores.

C-5 Coating – The C-5 coating is also an inorganic insulating coating. It has inorganic ceramic fillers to improve the electrical resistance of the steel. The C-5 coating is usually applied after the grain-oriented electrical steel is coated with the C-2 coating. It is usually applied for the grain-oriented electrical steel that will be used for oil-immersed or air-cooled cores. Also, it can resist the atmosphere at the stress-relief annealing if the temperature doesn’t exceed 815°.

The grain-oriented electrical steel can be applied with C-5 coating only or C-5 over C-2 coating.

Why Choose Longbank Grain-Oriented Electrical Steel?

Longbank is producing the grain-oriented electrical steel with a lot of advantages such as:

  • Longbank grain-oriented electrical steel has high magnetic permeability which results in lower inductions & low excitation currents.
  • The magnetostriction of Longbank grain-oriented electrical steel is very low and it has improved insulation properties which leads to reduction of noise emission.
  • Longbank grain-oriented electrical steel has a great lamination factor which will result in compact and better designs of different types of transformer cores.
  • The grain-oriented electrical steel from Longbank has low eddy current losses, low hysteresis, and high knee saturation characteristics.
  • Longbank grain-oriented electrical steel also improves productivity and increases the ease of winding.
Grain-Oriented Electrical Steel Production

Choose Longbank to Custom Your Grain-Oriented Electrical Steel

Grain-Oriented Electrical Steel
Grain-Oriented Electrical Steel

Start or flourish your steel business or transformer business by teaming up with Longbank!

Longbank is a reliable manufacturer that is focused on producing various types of high-strength grain-oriented electrical steel for transformers, inductors, generators, and for other applications. Aside from that, we are capable of customizing the grain-oriented electrical steel to ensure that we can fully satisfy your needs. We can produce them based on your desired thicknesses, sizes, surface finishes, types, and other specifications that you needed.

All of the grain-oriented electrical steel from Longbank are made from high-quality and carefully-selected raw materials. They are also manufactured using high-end manufacturing equipment. Every manufacturing process of the grain-oriented electrical steel is inspected to ensure its quality. They are also tested using different test methods such as Epstein testing, dimensional testing, single sheet testing, and other testing methods to measure their resistance, permeability, core loss, and their other characteristics.

Longbank is the ideal partner when it comes to supplying grain-oriented electrical steel! As a result of providing quality and cost-effective grain-oriented electrical steel and excellent services, many customers around the world have partnered with us.

For your inquiries, please feel free to contact us!

Longbank Grain-Oriented Electrical Steel Fabrication

grain-Oriented Electrical Steel

Longbank is manufacturing grain-oriented electrical steel that exhibits these excellent features and characteristics:

  • high magnetic flux density
  • low magnetostriction
  • outstanding magnetic properties in 1 direction
  • superior insulation quality
  • strong crystallographic properties
  • high magnetic permeability
  • low eddy current losses and hysteresis
  • high knee saturation characteristics
  • excellent lamination factor
  • high corrosion resistance
  • low iron loss
  • energy-efficient
  • high stacking coefficient
  • high dimension accuracy
Grain-Oriented Electrical Steel

The grain-oriented electrical steel has a lot of applications. It is very important in the production of:

  • different types of transformers such as audio output transformers, power transformers, current transformers, distribution transformers, instrument transformers, small transformers, large power transformers, welding transformers, and more
  • different types of generators such as power generators, medium-size to large-size generators, etc.
  • magnetic shields
  • different types of reactors such as shunt reactors
  • wound cores
  • high-voltage direct current transmission systems
  • large rotating machines
  • electrical vehicle driving motors
  • ballast
  • inductors
  • stacked cores

Longbank Grain-Oriented Electrical Steel for Various Applications

0.1mm Grain-Oriented Electrical Steel

The 0.1mm thin grain-oriented electrical silicon steel is commonly used for high-frequency applications. It has low core loss characteristics at high-frequency applications which makes it very effective for the production of a wide range of transformers.

0.23mm Grain-Oriented Electrical Silicon Steel

The 0.23mm grain-oriented electrical silicon steel can be used for power transformers, magnetic amplifiers, pulse transformers, and many more. It is featuring low iron damage, high magnetic permeability, and excellent corrosion resistance.

Grain-Oriented Electrical Silicon Steel for Toroidal 3 Phase Transformers

Longbank grain-oriented electrical silicon steel can be used for toroidal 3 phase transformers since it has good insulation, excellent heat resistance, high magnetic permeability, low iron loss, and excellent mechanical properties. It can reduce the energy consumption of toroidal 3 phase transformers.

Grain-Oriented Electrical Silicon Steel for Motors

The grain-oriented electrical silicon steel has high induction, low core loss, low eddy current loss, and good processability. It is ideal to use for different types of motors such as electric vehicle driving motors. Moreover, it is used to improve the efficiency and performance of motors.

Cold Rolled Grain-Oriented Electrical Steel for Transformers

The cold rolled grain-oriented electrical steel is suitable to use for various types of transformers such as audio output transformers, large power transformers, current transformers, and so on. It is featuring excellent lamination factor, high magnetic permeability, and superior insulation quality.

  • “I am so glad I have found a reliable supplier of grain-oriented electrical steel that customizes exactly everything according to my needs! The grain-oriented electrical steel from Longbank is high-quality, high-strength, and uniform in thickness.”

  • “Longbank grain-oriented electrical has great quality, high permeability, and excellent lamination factor. They are perfect for my business and they exceeded my expectations!”

  • “I am really satisfied with my orders from Longbank! All the grain-oriented electrical steel I ordered was custom orders and they produce it according to my requirements. I would highly suggest Longbank as a supplier of quality grain-oriented electrical steel!”

What are the Manufacturing Processes of Grain-Oriented Electrical Steel?

The grain-oriented electrical steel can be produced using different manufacturing processes such as:

  • BOF or basic oxygen furnace steelmaking
  • Secondary refining
  • Continuous casting
  • Slab reheating
  • Hot rolling
  • Stress-Relief Annealing
  • Cold rolling
  • Secondary recrystallization annealing
  • Heat flattening and an insulation coating
  • Decarburization annealing
  • Inspection and domain refining
Is the Grain-Oriented Electrical Steel Suitable for Machining Processes?

Yes, the grain-oriented electrical steel is suitable for machining processes. In fact, they have an excellent processing performance. Some of the machining processes that are suitable includes:

  • Shearing
  • Punching
  • Stacking
  • Welding
  • Laser cutting
  • Stamping
  • Decoiling
What are the Available Thicknesses of the Grain-Oriented Electrical Steel and its Uses?

The grain-oriented electrical steel is available in a wide range of thicknesses such as:

0.15 mm to 0.10 mm Thicknesses – These thicknesses are common for the grain-oriented electrical steel that will be used for frequencies under 1 kHz.

0.025 mm to 0.05 mm Thicknesses – These thicknesses are for the grain-oriented electrical steel that will be used for higher frequencies.

Aside from these, custom thicknesses are available.

What is the Difference Between Grain-Oriented Electrical Steel and Non-Grain Oriented Electrical Steel?

The grain-oriented electrical steel has the highest magnetic permeability, lowest iron loss value in one direction, strong directionality, and higher magnetic induction value than the non-grain oriented electrical steel.

Also, the grain-oriented electrical steel has a silicon content of about 3%. On the other hand, the non-grain oriented electrical steel has about 1.5% to 3.0% of silicon content.

The grain-oriented electrical steel also requires lower content of oxide inclusions in the steel.

Moreover, the grain-oriented electrical steel is commonly used in static equipment and machines such as transformers. On the other hand, the non-grain oriented electrical steel is commonly used for rotating equipment such as generators, electric motors, high-frequency converters, etc.

Is the Grain-Oriented Electrical Steel Customizable?

Yes, the grain-oriented electrical steel is fully customizable. It can be customized based on your required specifications such as thicknesses, dimensions, insulation coatings, features, grades, and other specifications.

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