Grain Oriented Silicon Steel Coil Transformers | High Magnetic Induction · Low Core Loss

Productos

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CJM is a trusted supplier of Grain Oriented Silicon Steel Coils (GOES), offering a wide range of high-performance grades for power and distribution transformers. With over 15 years of industry experience, an annual inventory of 1 million+ tons, and a global presence across Europe, South America, the Middle East, India, and beyond, CJM provides reliable materials and services tailored to transformer manufacturers worldwide.

What is Grain Oriented Silicon Steel Coil?

Grain Oriented Silicon Steel Coil is a high-performance electrical steel designed specifically for transformer cores. Through advanced heat treatment and precise grain orientation control, the material delivers superior magnetic properties in the rolling direction, significantly reducing energy loss and enhancing transformer efficiency.

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Características principales

Artículo	Characteristic
Composing Component	Inorganic coating
Surface insulation resistance	Surface insulation resistance (Guaranteed Value: 30 Q.cm2/side) and excellent insulation
Adhesion	Fine adhesion, adhesion level ≥ B, close combination of coating and substrate, unease to peel
Lamination factor	Uniform coating and high Lamination factor make good lamination effect.
Processability	Excellent stamping and welding ability
Heat resistance	For the high magnetic induction type products, the coating can withstand 820°C stress relieving annealing in non-oxidation environment.
Corrosion resistance	The coating can immune from the corrosion of insulating coil,mechanical oil, cooling coil, antifreezing oil, rust preventive oil and Freon.
Limits of hazardous substances	The products comply with RoHS and REACH limited requirements for hazardous substances.

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Especificaciones técnicas

Category	Especificación
Normas	ASTM A876 / IEC 60404-8-7 / JIS C2552 / GB/T 2521
Grades	CGO: 30QG120, 30QG130 HiB: 23QG110, 27QG120
Coil Weight	1 – 10 tons (customizable)
Magnetic Induction (B800)	≥ 1.88 T
Core Loss (P1.7/50)	≤ 1.05 W/kg
Stacking Factor	≥ 0.96
Edge Type	Slit Edge or Mill Edge
Aplicaciones	Power transformers, distribution transformers, CTs, VTs, and more
Processing	Secondary recrystallization, laser scribing (optional)
Embalaje	Export-safe with anti-rust paper, plastic wrap, steel strap, pallet

Nominal Thickness (mm)	Nominal Width (mm)	Inner Diameter (mm)	Weight (t)
0.15、0.18、0.20、0.23、0.27、0.30	900~1200	508	2~5
Note:  Please consult us if you have special weight requirements.

Nominal thickness (mm)		Thickness tolerance (mm)	Transverse thickness tolerance (mm)	Longitudinal thickness tolerance (mm)	Width tolerance (mm)	Flatness (%)	Camber 2m (mm)
0.15		+0.008 – 0.015	≤0.010	≤0.012	0~+0.5	≤1.0	≤0.8
0.18
0.2
0.23		+0.010 – 0.020
0.27			≤0.012
0.3		+0.010 – 0.025
Nota:	(1) Traverse thickness deviation refers to the thickness difference between the sheet center and 15mm from the edge. (2) The longitudinal thickness difference is the difference of the measured maximum thickness and the minimum thickness in the longitudinal direction at an arbitrary 2m length of steel on a arbitrary coil. (3) Please consult us if you have special dimensional requirements.

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Applications of Grain Oriented Silicon Steel Coil

CJM’s grain oriented silicon steel coils are designed for advanced magnetic performance and energy efficiency. They are widely used across key segments of the power and energy industry. Below are the main application areas:

Power Transformers

Used in high-voltage transmission systems and substations, power transformers require high magnetic induction and minimal core loss. HiB grade silicon steel ensures long-term stability and reduced no-load loss in equipment operating at voltages up to 750kV.

Typical Users: Grid operators, transformer OEMs, utility companies

Distribution Transformers

Common in residential, commercial, and industrial power distribution, these transformers operate continuously and demand low energy loss. CJM’s GO steel enables better efficiency and temperature control, which leads to longer service life and lower operational cost.
Typical Users: Local utilities, building energy systems, rural electrification projects

Instrument Transformers (CTs and VTs)

Current and voltage transformers require precision magnetic properties for accurate power measurement and protective relays. GO steel’s stable permeability and low hysteresis make it ideal for these compact, high-accuracy devices.

Typical Users: Switchgear manufacturers, substation automation providers

Smart Grid and Renewable Energy Systems

As global energy shifts toward renewables, grain oriented silicon steel plays a critical role in solar inverter transformers, wind turbine step-up transformers, and smart grid control units. It supports compact design and low-loss operation essential for modern energy systems.

Typical Users: Solar and wind energy equipment manufacturers, EPC contractors

Industrial Power Systems

Factories and heavy-duty facilities rely on large transformers and reactors to regulate voltage and current. GO steel provides excellent magnetic stability and heat resistance under demanding industrial conditions.

Typical Users: Metallurgy plants, oil & gas facilities, cement and chemical industries

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¿Por qué elegir CJM?

• Más de 15 años de experiencia: Proveedor de confianza con presencia mundial.
• Inventario anual de más de 1 millón de toneladas: Garantiza un suministro estable y una entrega rápida.
• Soluciones integrales: Combina ventas, corte de precisión, procesamiento y logística.
• Mercados mundiales: Servimos a Europa, Sudamérica, Oriente Medio, India y más allá.

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Global Markets & Reach

CJM proudly serves clients in:

• Europa – Germany, France, Italy, Poland
• América del Sur – Brazil, Argentina, Chile
• Oriente Medio – UAE, Saudi Arabia, Egypt
• India and other fast-growing regions

We support OEM/ODM, fast delivery, and flexible logistics for global customers.

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Logistics & Services

With a massive inventory and in-house processing, CJM delivers fast, precisely cut silicon steel coils worldwide.
Our integrated service system ensures:

• Real-time supply chain support
• On-demand slitting & cutting
• Secure packaging for sea/air freight

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Get Your Electrical Steel Plate Today!

Looking for a reliable electrical steel plate partner? Contact CJM’s expert sales team today.

P: ¿Cuáles son los principales productos/servicios de su empresa?

R: Somos fabricantes profesionales de productos de acero al carbono, acero aleado y perfiles. Tenemos la experiencia del negocio de acero por más de 10 años y nuestros productos se exportan a Oriente Medio, Suramérica, Asia sudoriental, África, Asia del sur y del este etc.

P: ¿Puedo visitar su fábrica?

R: Por supuesto, invitamos a clientes de todo el mundo a visitar nuestra fábrica.

P: ¿Cuáles son sus condiciones de pago?

R: 30% T/T depósito y 70% saldo antes del envío.

P: ¿Cuál es su plazo de entrega?

R: Para las existencias, podríamos transportar las mercancías al puerto de carga dentro de los 7 días después de recibir el depósito; Para la producción, por lo general toma alrededor de 15-30 días después de recibir el depósito.

P: ¿Proporcionan muestras? ¿Son gratuitas o de pago?

R: Las muestras están disponibles de forma gratuita, pero el flete de mensajería será cubierto por la cuenta del cliente.

P: ¿Aceptan la inspección de terceros?

R: Sí, aceptamos inspecciones de terceros.

P: ¿Por qué debería comprarles a ustedes y no a otros proveedores?

R: Integrando los recursos superiores de la industria siderúrgica de China, proporcionamos a los clientes productos de acero de alta calidad a precios preferenciales, y podemos garantizar que las mercancías se entregan a los clientes a tiempo.

P: ¿Cómo garantizan la calidad?

A: Siempre una muestra de pre-producción antes de la producción en masa;Siempre 100% inspeccionado antes del envío