Product Description

Silicon Steel

Silicon steel, also known as electrical steel, silicon electrical steel, lamination steel, relay steel, or transformer steel is specialty steel with silicon added to it, which improves its electrical resistivity and magnetic properties, and reduces hysteresis loss. This steel is ideal for various electrical applications where electromagnetic fields are important, such as transformers, magnetic coils, and electrical motors.

Electrical steel usually referred to as cold-rolled electrical steel, can be divided into two major categories including grain-oriented electrical steel and non-oriented electrical steel. Grain-oriented electrical steel, with its easy magnetization direction parallel to the rolling direction, has excellent magnetic properties in this direction including low core loss, high permeability, and low magnetostriction, and is widely used in the transformer industry. Further, it can obtain lower core loss by domain refinement treatment. Meanwhile, non-oriented electrical steel, featured by a random distribution of grain orientation and magnetic isotropy, is widely applicable to the motor industry.

Grain-oriented electrical steel usually contains a level of 3% silicon and is processed in a way to develop ideal properties in the rolling direction. Non-oriented electrical steel usually contains a level of 2%-3.5% silicon. It has similar magnetic properties in all directions, the so-called isotropy. Cold-rolled non-grain-oriented steel (CRNGO) is less expensive than cold-rolled grain-oriented steel (CRGO). CRNGO can be used in cost-oriented applications with the inconstant direction of magnetic flux, such as electric motors and generators. CRGO is usually in coil form and has to be cut into laminations further, being used in transformer core applications, such as certain internal parts in audio output transformers.

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Product Specification and Size :

Standard Size

ThicknessWidthSlittingInside DiameterOutside Diameter
0.35mm, 0.50mm, 0.65mmOriginal: 750~1290mm40~645mm508~610mm800~1550mm

Silicon Steels and Their Applications

Silicon steel is the most important magnetic material in industrial applications. The general applications include volt relays or pulse transformers from the generator, automotive, and transformer sectors.

Silicon steel is undoubtedly the most important soft magnetic material in use today. Applications vary in quantities from the few ounces used in small relays or pulse transformers to tons used in generators, motors, and transformers. Continued growth in electrical power generation has required development of better steels to decrease wasteful dissipation of energy (as heat) in electrical apparatus and to minimize the physical dimensions of the increasingly powerful equipment now demanded.

Substantial quantities of oriented steel are used, mainly in power and distribution transformers. However, it has not supplanted nonoriented silicon steel, which is used extensively where a low-cost, low-loss material is needed, particularly in rotating equipment. Mention should also be made of the relay steels, used widely in relays, armatures, and solenoids. Relay steels contain 1.25 to 2.5% Si, and are used in direct current applications because of better permeability, lower coercive force, and freedom from aging.

Applications for oriented silicon steel include transformers (power, distribution, ballast, instrument, audio, and specialty), and generators for steam turbine and water wheels.

Fields of Application

Fields of applicationGrain-oriented electrical steelNon-oriented electrical steel
Series GSeries PSeries RSeries ASeries AHSeries ARSeries AT
RotatorsLarge-sized motors

Medium-sized motors

Compressor motors

General motors

Small-sized precision motors

Motors for electric cars

Static deviceHigh-frequency motors

Large-sized transformers

Small-sized power transformers
Transformers for instruments

Reactors and magnetic amplifiers

Power switches

Transformers for welding

Voltage regulators

Magnetic sealers

Electromagnetic devices for accelerators

-Material Selection

Grain-oriented electrical steel

VarietiesCommon typeHigh induction typeDomain refinedhigh induction type
Large motors
Large transformers
Medium and small transformers
Distributing transformers
Voltage regulator
Reactor and magnetic amplifier
IF transformer

Mutual inductor
TV transformer
Radio transformer
Radio broadcast transformer

Mechanical Property

Mechanical Property
GradeYeild Strength(N/mm2)Ultra-TensionStrength(N/mm2)Ductility(%)Hardness(HV1

Insulating Coating

Insulating Coating
Coating typesM11M21
ComponentChromium containing , semi organic coatingChromium free, semi organic coating
Coating thickness(μm)0.7~1.50.8~5.0
Interlayer resistance(Ω•mm2 /slice)≥100≥100
Adhesive propertyClass A or class BClass A or class B
Punching propertyExcellentExcellent
Antirust propertyExcellentExcellent
Heat resisting propertyResistant annealing at 750 C, N2 protection, for 2hAnnealing resistance in general

Inspection Certificate


Product Processing


Product Packing





Q: Are you a manufacturer?

A: Yes , we are a manufacturer, We have own factory, which is located in JIANGSU,CHINA. We have a leading power in producing and exporting stainless steel.carbon steel, various nickel-based alloys etc. We promise that we are what you are looking for.
Q:Can we visit your factory ?
A:Warmly welcome once we have your schedule we will pick you up .
Q: Do you have quality control?
A: Yes, we have gained BV, SGS authentication.

Q: Can you arrange the shipment?
A: Sure, we have permanent freight forwarder who can gain the best price from most ship company and offer professional service.
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 15-25 days if the goods are not in stock, it is according to quantity.
Q:How can we get the offer?

A:Please offer the specification of the product,such as material,size,shape,etc.So wecan give the best offer.

Q:Can we get the some samples?Any charges?

A:Yes,you can get available samples in our stock.Free for real samples,but customers need to pay the freight cost.

Q: How do you make our business long-term and good relationship ?

A:We keep good quality and competitive price to ensure our customers' benefit; We respect every customer as our friend and we sincerrly do business and make friends with them, no matter where they come from.

Q:Are there any discounts now?

A:We have a full reduction activity for new buyers who send inquiry on the web page, that is, send demand information from the input box at the bottom of this page.

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