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Silicon steel classification follows two axes. First, by grain structure: CRGO or CRNGO. Second, by end use: transformer, motor, or generator grade. At Jiangsu Zhongtong Weiye Special Steel Co., Ltd., we supply both axes. Here is the matrix.

By Grain Structure

Type	Grains	Magnetic behavior	Best for
CRGO	Aligned (Goss texture)	Flux flows one way	Transformers
CRNGO	Random	Flux works all directions	Motors, generators

We supply M3 Grain Oriented Electrical Steel for transformers and M19 Non Oriented Electrical Steel for motors.

By End Use

Transformer Grade (CRGO)

Transformer-grade steel prioritizes ultra-low core loss. Furthermore, it offers high magnetic induction. Consequently, it suits UHV, distribution, and industrial transformers. Common grades: M3, M4, M5.

Motor Grade (CRNGO)

Motor-grade steel handles rotating flux. Furthermore, it balances punchability with low loss. Consequently, it suits home appliances, industrial drives, and EV traction motors. Common grades: M19–M43.

Generator Grade (CRNGO)

Generator-grade steel balances permeability with mechanical strength. Furthermore, it withstands outdoor conditions. Consequently, it suits wind, hydro, and industrial generators.

Main Application Areas

Sector	Example equipment	Steel type
Power grid	UHV transformer	CRGO
Industrial	Drive motor	CRNGO
Automotive	EV traction motor	CRNGO (thin gauge)
Home appliances	AC compressor	CRNGO
New energy	Wind generator	CRNGO
Other	Welder, induction cooker	CRNGO

How to Pick the Right Grade

Ask three questions:

1. Static or rotating? Static → CRGO. Rotating → CRNGO.
2. What frequency? 50/60 Hz → standard. kHz → thin gauge.
3. What efficiency class? Premium → higher grade.

Consequently, match grain structure to flux path, and grade to efficiency target.

What We Supply

We ship electrical steel coil:

• CRGO: M3, M4, M5.
• CRNGO: M19, M27, M36, M43.
• Thickness: 0.18–0.50 mm.
• Slit to width: ±0.05 mm.
• Coil ID: 508 mm or 406 mm.

Furthermore, we pack for ocean freight with VCI paper.

What We Do Not Do

We do not:

• Manufacture transformers or motors.
• Stamp finished laminations.
• Supply amorphous metal cores.

Consequently, we are your upstream classification-aware coil supplier.

Specify Your Silicon Steel

Tell us:

1. Equipment type (transformer, motor, generator).
2. Operating frequency (Hz).
3. Required efficiency class.
4. Strip width and coil ID.

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.