F&Q

Electrical steel is the iron-silicon alloy that runs the modern grid. It forms the magnetic circuit in every transformer, motor, and generator. Furthermore, it decides how much electricity becomes wasted heat. At Jiangsu Zhongtong Weiye Special Steel Co., Ltd., we supply both grain-oriented and non-oriented grades. Here is the plain-language guide.

What It Is Made Of

Electrical steel contains 2–4.5% silicon by weight. Silicon raises electrical resistivity. Furthermore, it lowers magnetic loss. Consequently, eddy currents struggle to flow. The iron base provides high saturation flux density.

How It Works

AC current creates a changing magnetic field. Furthermore, the steel’s magnetic domains align and flip each cycle. That alignment stores and releases energy. Higher permeability means the magnetizing current stays low. Consequently, the device runs efficiently.

Core Loss: The Key Metric

Core loss combines two losses:

• Hysteresis loss: energy spent flipping domains.
• Eddy current loss: circulating currents in the steel.

Thin laminations and high silicon content cut both. Consequently, 0.27 mm CRGO loses far less than 0.50 mm plain steel.

Two Main Types

Type	Grain direction	Best for	Typical grade
CRGO (grain-oriented)	Along rolling	Transformers	M3, M4, M5
CRNGO (non-oriented)	Random	Motors, generators	M19–M43

CRGO: For Transformers

CRGO grains align in the rolling direction. Consequently, flux flows easily one way. Transformers have unidirectional flux. Furthermore, they run at 50–60 Hz. Consequently, CRGO is the only choice for power transformers. We supply M3 Grain Oriented Electrical Steel, M4 Grain Oriented Electrical Steel, and M5 Grain Oriented Electrical Steel.

CRNGO: For Motors

CRNGO grains point in all directions. Consequently, it works where flux rotates. Motors spin. Furthermore, flux turns with the rotor. Consequently, motor stators and rotors use non-oriented steel. We supply M19 Non Oriented Electrical Steel for premium motor applications.

How to Choose a Grade

Ask four questions:

1. Transformer or motor? Transformer → CRGO. Motor → CRNGO.
2. What frequency? 50/60 Hz → standard thickness. kHz → thin gauge.
3. What efficiency class? IE3/IE4 → premium grade.
4. How much can you spend? Premium grade costs more but saves energy for decades.

What We Supply

We ship electrical steel coil:

• CRGO: M3, M4, M5.
• CRNGO: M19 and above.
• Thickness: 0.23–0.50 mm.
• Slit to width: ±0.05 mm.
• Coil ID: 508 mm or 406 mm.

Furthermore, we pack for ocean freight with VCI paper.

Get the Right Electrical Steel

Tell us your equipment type and efficiency target. We will recommend the correct grade and quote.

• Email: vera.liang@ztwysteel.com
• Location: Xishan District, Wuxi, Jiangsu, China
• Supply range: CRGO grain-oriented steel, CRNGO non-oriented steel, slit strip
• Slitting tolerance: ±0.05 mm
• Documentation: MTC with core loss, thickness, width, and insulation coating

We reply within one working day.