Grain Oriented Silicon Steel Coil Transformers | Low Core Loss & Stable Magnetic Performance

Product Overview: Grain Oriented Silicon Steel

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, North America, the Middle East, Asia, and beyond, CJM provides reliable materials and services tailored to transformer manufacturers worldwide.

These grain oriented silicon steel coils are primarily supplied for transformer core manufacturing, where low core loss, directional magnetic properties, and long-term performance stability are key selection criteria.

Our coils are suitable for:

• Power transformers (110kV–750kV)
• Distribution transformers
• Dry-type transformers
• Instrument transformers (CT/VT)
• EV charging transformers
• Solar & wind power inverter transformers

These applications require transformer grade silicon steel with stable magnetic induction, low iron loss, and consistent stacking performance, especially for high-efficiency power and distribution transformers.

Get Instant Pricing for Grain Oriented Silicon Steel Coils

We support bulk and wholesale silicon steel coil procurement for transformer manufacturers, EPC contractors, and electrical equipment distributors worldwide.

• Available Grades: 23QG110, 27QG120, 30QG120, 30QG130
• Coil Status: In stock for most standard thicknesses
• Processing: Slitting, cutting, lamination packing customization
• MOQ: 1 ton
• Delivery: 7–15 days to major markets
• Quote Lead Time: Within 24 hours through emails and instant reply through online chat.

➡ Send Your Width / Grade — Receive Your Quote

Technical Specifications of Grain Oriented Silicon Steel Coils

The specifications below follow standard electrical steel coil requirements for transformer core design. Mill test certificates (MTC), including iron loss and magnetic induction data, can be provided for each shipment upon request.

Category	Specification
Standards	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
Applications	Power transformers, distribution transformers, CTs, VTs, and more
Processing	Secondary recrystallization, laser scribing (optional)
Packaging	Export-safe with anti-rust paper, plastic wrap, steel strap, pallet

Chemical Composition (Typical Values)

Element	Max %
C	0.08
Si	2.9–3.2
Mn	0.50
P	0.10
S	0.015
Al	0.30

(Exact composition varies by grade; mill certificates provided.)

Magnetic & Mechanical Properties (Standard Requirements)

Grade	Thickness (mm)	W17/50 (W/kg)	B8 (T)	Tensile Strength (MPa)
23QG110	0.23	≤1.10	≥1.83	340–420
27QG120	0.27	≤1.20	≥1.80	340–420
30QG120	0.30	≤1.20	≥1.80	340–420
30QG130	0.30	≤1.30	≥1.78	340–420

Full test results with iron loss and magnetic induction can be provided upon request.

Processing Capabilities for Transformer Core Applications

CJM provides complete coil processing solutions for transformer manufacturers, including:

• Precision slitting: width tolerance ±0.2 mm
• Core lamination cutting
• Automatic stacking & packing
• Paper interleave (Kraft paper / Tissue)
• Coil rewinding & weight customization

This processing capability helps maintain uniform strip edges, controlled burr height, and consistent stacking performance during transformer core assembly.

Why Choose CJM for Grain Oriented Silicon Steel?

CJM operates as a global silicon steel supplier and processing partner, supporting transformer manufacturers with material selection, slitting, packing, and export coordination rather than mass steelmaking.

• 15+ Years of Expertise‌: Trusted supplier with a global footprint.
• 1 Million+ Tons Annual Inventory‌: Ensures stable supply and quick delivery.
• End-to-End Solutions‌: Combines sales, precision cutting, processing, and logistics.
• Global Markets‌: Serving Europe, South America, North America, the Middle East, Asia.

If you’re searching for a reliable silicon steel coil supplier, CJM provides consistent quality and fast delivery to help reduce your procurement cycle. We support OEM/ODM, fast delivery, and flexible logistics for global customers.

Logistics & Services

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

• Seaworthy steel-sheet & pallet protection
• Coil eye vertical or eye-to-sky based on customer requirement
• Edge protector + moisture-resistant wrapping
• Suitable for long-distance ocean shipment

Request a Quote for Grain Oriented Silicon Steel Today

We supply in-stock GO and HiB silicon steel coils, precision slitting services, and fast delivery for global transformer manufacturers.
For accurate pricing, please send us your size requirement and destination port — our engineers will reply with a tailored quotation within 24 hours.

Q: What is your company’s main products/services?

A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.

Q: Can I go to your factory for a visit?

A: Of course, we welcome customers from all over the world to visit our factory.

Q: What are your terms of payment?

A: 30% T/T deposite and 70% balance before shipment.

Q: What is your delivery time?

A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.

Q: Do you provide samples? Are they free or paid?

A: Samples are available for free,but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?

A:Yes, we fully accept ‌third-party inspections.

Q: Why should I buy from you not from other suppliers?

A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.

Q:How can you guarantee quality?

A: Always a pre-production sample before mass production;Always 100% inspected before shipment