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Help CenterElectromagnetic Pure Iron Hot Rolled Bar for Transformer Cores Ø20-120mm GB/T 699
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Shanxi Jurun Technology Co., Ltd., located in the industrial hub of Taiyuan, China, specializes in producing premium electromagnetic pure iron hot rolled bars engineered specifically for transformer core applications. Our Ø20-120mm bars manufactured under GB/T 699 standards deliver exceptional magnetic properties critical for energy-efficient electrical equipment. With decades of metallurgical expertise, we provide materials that significantly reduce eddy current losses while maintaining structural integrity under demanding operational conditions.
Key Technical Specifications:
- Material Composition: >99.8% pure iron with controlled trace elements
- Crystalline Structure: Directional grain orientation optimized for magnetic flux
- Surface Finish: Scale-free surface with ≤20μm roughness
- Straightness Tolerance: ≤1.5mm/m across all diameters
| Diameter (mm) | Permeability (μ) | Core Loss (W/kg) | Typical Application |
|---|---|---|---|
| 20-40 | ≥5000 | ≤2.8 | Small distribution transformers |
| 41-80 | ≥4800 | ≤3.2 | Medium power transformers |
| 81-120 | ≥4500 | ≤3.6 | Large industrial transformers |
Manufacturing advantages include our proprietary hot rolling technology that aligns the crystalline structure to enhance magnetic domain movement. This process delivers:
- Consistent magnetic properties throughout material length
- Reduced machining waste during core stamping
- Improved stacking factor (>97%) in laminated cores
- Thermal stability up to 150°C operating temperatures
Performance Benefits:
- Energy savings: Up to 15% reduction in no-load losses compared to conventional steels
- Acoustic performance: 3-5 dB noise reduction in transformer operation
- Service life: Minimum 30-year operational lifespan under standard conditions
As a Taiyuan-based manufacturer in China's steel heartland, Shanxi Jurun Technology maintains rigorous quality control through every production stage. Our electromagnetic pure iron bars undergo comprehensive testing including Epstein frame measurements, metallographic analysis, and dimensional verification. Partner with us for materials that meet exacting transformer industry requirements while optimizing your manufacturing efficiency. Contact our technical team today to discuss your specific core material needs and request material certification documentation.
Frequently Asked Questions:
-
Q: Why choose pure iron over silicon steel for transformer cores?
A: Pure iron offers higher saturation induction (2.15T vs 1.97T in Si-steel) and superior permeability, particularly beneficial for compact high-efficiency transformers. -
Q: Can you supply diameters outside the 20-120mm range?
A: Custom diameters are available upon request with minimum order quantities. -
Q: What packaging options do you offer?
A: Standard packaging includes VCI-coated steel strapping on wooden cradles. Special packaging for export shipping available. -
Q: What is your standard delivery lead time?
A: 30-45 days for standard sizes, subject to order volume and production schedule. -
Q: Do you provide material test certificates?
A: Yes, we supply GB/T 699-compliant mill test certificates with every shipment. -
Q: Can this material be welded during transformer assembly?
A: While possible with specialized techniques, we recommend mechanical joining methods to preserve magnetic properties.
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