Premium 0.30mm Baosteel Transformer Core for Enhanced M3 Efficiency

Product Description

Product Description

 

Oriented silicon steel is a top-tier, low-carbon silicon iron alloy enriched with between 0.5% and 4.5% silicon. This remarkable material boasts exceptional high permeability, which dramatically minimizes Joule loss in power equipment. This not only significantly boosts efficiency but also enhances energy-saving capabilities, making it an economical choice. Additionally, it features reduced iron loss and an increased resistance coefficient, further elevating its superior performance.


Baosteel and WISCO are integral parts of the prestigious BAOWU group, with B30P120 from Baosteel offering high permeability, equivalent to 30QG120 from WISCO, ensuring outstanding magnetic performance.

Type	Grade	Width	Max Core Loss@P1.7T/50Hz	Lamination Factor(%)	Min Induction@B800
Common Type	23Q110	35-1200mm	1.10w/kg	97.2	1.82T
	23Q120		1.20w/kg	97.2	1.82T
	27Q120		1.20w/kg	97.5	1.82T
	30G120		1.20w/kg	98	1.82T
High Induction Type	B20P085	35-1200mm	0.85w/kg	97	1.86T
	B23P085		0.85w/kg	97.2	1.88T
	B23P090		0.90w/kg	97.2	1.88T
	B23P095		0.95w/kg	97.2	1.88T
	B23P100		1.00w/kg	97.2	1.88T
	B27P095		0.95w/kg	97.5	1.89T
	27QG100		1.00w/kg	97.5	1.89T
	B30P120		1.20w/kg	98	1.89T
Domain Refined High Induction Type(Laser)	B20R070	35-1200mm	0.70w/kg	97	1.86T
	B23R085		0.85w/kg	97.2	1.88T
	B27RK085		0.85w/kg	97.5	1.89T

Magnetic properties
Low core loss, high permeability, and excellent application performance that caters to advanced engineering needs.
Thickness tolerance
With good thickness tolerance and a high lamination factor, our product ensures superior quality and reliability.
Processing property
It is designed for seamless punching and cutting, maintaining excellent dimensional tolerance for precise engineering applications.
Insulation coating
Features small color deviation, good adhesiveness, and excellent resistance to heating and corrosion, with high insulation coating resistance. Our products comply with key regulations, including EU RoHS and REACH, ensuring safety and sustainability.

 

We meticulously calculate and regularly update our quotations based on your detailed drawings. This ensures unmatched precision and cost-efficiency, allowing you to maximize your investment.

Upon receiving your confirmation, we transition seamlessly into production, adhering strictly to the meticulously detailed drawings you provide. This guarantees top-notch quality and accuracy in every product we deliver.

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FAQ

 

1. Which products can we provide?
CRGO mother coils, slit coils, transformer lamination, and OEM transformer cores.

2. Who are we?
Established in 1988, we are pioneers in CRGO silicon steel products in China and the exclusive users of Bao-steel. We have also established a joint laboratory with Baosteel.

3.How can we guarantee quality?
Our production process adheres strictly to the ISO9001:2015 Standard. Before placing an order, our engineers perform meticulous calculations. Post-production, we conduct rigorous tests before dispatching the products.

4. Why should you buy from us instead of other suppliers?
With over 30 years of expertise in producing transformer cores, we utilize advanced German slitting and cutting systems, including the Georg 800 cross-cutting E-stack machine. Our annual production capacity exceeds 100,000 tons, making us a reliable choice.
 

Purchasing a good-quality transformer core is critical because it directly affects no-load loss, efficiency, noise, temperature rise, and service life. Below is a practical, industry-oriented guide you can use when sourcing cores from any supplier.

1. Define Your Technical Requirements First

Before contacting suppliers, be very clear about:

(a) Electrical parameters

• Transformer type: distribution / power / dry-type / amorphous

• Rating (kVA / MVA)

• Frequency: 50 Hz or 60 Hz

• Voltage class

• Target no-load loss (W) and exciting current (%)

• Noise limits (especially for distribution transformers)

(b) Core structure

• Core type: 3-leg, 5-leg, shell type

• Joint type: step-lap (preferred) or mitred

• Stacking factor requirement (≥ 0.97 for GO steel)

• Lamination thickness:

  • GO silicon steel: 0.23 / 0.27 / 0.30 mm

  • Amorphous: ~0.025 mm

2. Select the Right Core Material

(a) Grain-Oriented Silicon Steel (GOES)

Key points:

• Use Hi-B or Laser-scribed Hi-B

• Check steel brand and grade:

  • Examples: 23ZH90, 23ZH100, 27Q120, 30Q130

• Request original mill test certificate (MTC)

Important parameters to verify:

• Core loss (W/kg) @ 1.7 T

• Magnetic induction (B800 or B1000)

• Aging factor

• Coating type (C-5 / C-6)

(b) Amorphous Alloy (for ultra-low loss)

• Confirm alloy brand and ribbon source

• Check annealing process and brittleness control

• Ensure supplier has experience in amorphous cut-core handling

3. Evaluate the Core Manufacturer (Very Important)

A good core is not only about steel-it's about processing capability.

Ask about:

• Core cutting line (Georg, Föppl, or equivalent)

• Automatic step-lap cutting & stacking

• Annealing furnace (temperature control & atmosphere)

• Quality inspection equipment

Factory quality system:

• ISO 9001 mandatory

• ISO 14001 / ISO 45001 preferred

• Experience with utility / EPC / export projects

4. Key Quality Checks Before Purchase

Request the following before mass order:

(a) Prototype or sample core test

Ask for:

• No-load loss (W)

• Exciting current (%)

• Noise level (dB)

• Core weight & dimensions

(b) Documentation

• Steel MTC from original mill

• Core loss test report

• Dimensional drawing

• Packing & rust-prevention method

(c) Joint & stacking inspection

• Step-lap consistency

• No burrs on lamination edges

• Uniform pressure on yokes

• Proper insulation coating (no peeling)

5. Packaging & Logistics (Often Overlooked)

Poor packing can destroy a good core.

Ensure:

• Anti-rust protection (VCI paper / oil film)

• Strong wooden crate with shock protection

• No lamination displacement during transport

• Moisture protection for sea shipment

6. Supplier Qualification Checklist (Quick Use)

Uses branded GO steel (not mixed grades)
Provides mill certificates
Has step-lap cutting lines
Offers loss guarantee (contractual)
Supports FAT / third-party inspection
Has stable export experience

7. Recommended Purchasing Process

1. Shortlist 2-3 qualified core manufacturers

2. Compare technical proposal, not only price

3. Request sample core or reference projects

4. Place trial order

5. Approve supplier for long-term cooperation

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