Oriented silicon steel coil

Electrical steel sheets for transformer cores

20R070 High Magnetic Induction Grain-Oriented Silicon Steel

Key Selling Points

• Ultra-low iron loss (≤0.70 W/kg): Reduces no-load losses in transformers, leading to energy savings and lower operational costs over the transformer's lifetime.
• High magnetic flux density (≥1.86T): Allows for more compact transformer cores, reducing material usage and overall transformer weight.
• Precise thickness (0.20mm): Optimizes lamination factor and reduces eddy current losses, improving overall efficiency.
• Stringent impurity control: Strict control of C, S, N ensures consistent magnetic performance and reliability.
• Proven in global applications: Trusted by transformer manufacturers worldwide, including WEG in Brazil and clients in Mexico, ensuring reliable supply.

Technical Specifications

Models and Options

The 20R070 grade is available in coil or slit strip form. Various widths and insulation coatings can be customized to meet specific transformer core requirements.

Materials and Structure

Mainly composed of iron (Fe) with silicon (Si) added at about 3.0%-3.2%. Contains Al, Mn, and strictly controlled impurities (C, S, N) to ensure high magnetic permeability (Hi-B) performance.

Applications

Specifically designed for high-efficiency distribution transformers and power transformer cores. Suitable for applications requiring low loss and high efficiency, such as grid upgrades in Europe, Canada, and Brazil.

Customization

We offer in-house processing capabilities to provide precise secondary processing (slitting, cutting) based on customer specifications. Custom widths, coil weights, and packaging available upon request.

Case Study

Brazilian Transformer Manufacturer (WEG): 20R070 has been widely used in WEG's local transformer production in Brazil for over 10 years, meeting the energy efficiency standards of INMETRO and contributing to Brazil's grid modernization.

Mexican Transformer Manufacturer: Supplied batch quantities for the manufacturing of power transformers and distribution transformers, with stable operation verified over 10 years, supporting a business scale of ~$500 million annually.

FAQ

• Q: What is the minimum order quantity?
  A: The MOQ is 25 tons.
• Q: What are the available delivery terms?
  A: We offer EXW, FOB, and CIF delivery terms.
• Q: What payment terms do you accept?
  A: Typically 30% deposit and 70% before shipment (30/70).
• Q: Can you provide third-party testing?
  A: Yes, pre-shipment testing and third-party testing can be arranged.
• Q: How does this grade perform in cold climates?
  A: Our silicon steel retains at least 95% magnetic permeability at -40°C, ensuring reliable operation in extreme conditions (as validated in Canadian projects).
• Q: Do you offer custom slitting services?
  A: Yes, we have in-house processing for precision slit strips to meet your dimensions.
• Q: What is the typical lead time?
  A: Delivery time depends on the volume and specific requirements; please contact us for current lead times.
• Q: Is this product suitable for HVDC converter transformers?
  A: Yes, our ultra-low loss oriented silicon steel has been used in ±800kV HVDC projects, with magnetic flux density ≥1.92T and iron loss <0.85W/kg for specific grades.

Inquiry Information

Contact us today for pricing and availability.

• Email: sales-01@hlslind.com
• Phone/WhatsApp: +86 134-6700-2282
• Website: www.hlslind.com

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• Alt: 20R070 electrical steel sheets stacked for transformer lamination