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Help CenterDT4C Electromagnetic Pure Iron Bright Bar Ø5-19mm Cold-Drawn GB/T 6983-2008
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Shanxi Jurun Technology, based in Taiyuan's industrial hub, manufactures precision DT4C electromagnetic pure iron bright bars engineered for superior magnetic performance. Our cold-drawn bright bars deliver exceptional magnetic permeability with minimal core loss, making them ideal for sensitive electromagnetic applications where consistent material properties are critical.
Core Technical Advantages:
- Ultra-low coercivity (typically under 96A/m) ensures rapid magnetic response
- Cold-drawing process enhances grain orientation for directional permeability
- Surface roughness maintained at Ra ≤ 0.8μm for reduced eddy current losses
- Controlled carbon content ≤ 0.025% minimizes magnetic aging effects
Precision Specifications:
| Parameter | Value | Benefit |
| Maximum Permeability | ≥ 0.0115 H/m | Enhanced flux density in cores |
| Resistivity | ≥ 0.12 μΩ·m | Reduced eddy current losses |
| Density | 7.85 g/cm³ ±0.05 | Consistent volumetric calculations |
The cold-drawing process achieves dimensional tolerances within h9 per GB/T 1800.2, with straightness maintained at ≤1.5mm/m. This precision ensures seamless integration in automated assembly systems for components like:
- Relay armatures and yokes
- Transformer laminations
- Magnetic shielding assemblies
- Solenoid cores
Quality Assurance: Each batch undergoes:
- Spectrochemical analysis for purity verification
- Ring sample magnetic testing per GB/T 3656
- Surface inspection under 10x magnification
- Statistical process control of dimensional parameters
Manufactured at our Shanxi facility, these bright bars benefit from Jurun's decade-long expertise in electromagnetic materials. Our integrated production control - from billet selection to final drawing - guarantees batch-to-batch consistency essential for precision instruments. Partner with us for reliable material solutions that enhance your product's magnetic efficiency while reducing manufacturing rejects.
Frequently Asked Questions:
Q: What surface protection is provided during shipping?
A: Bars are coated with VCI anti-rust paper and bundled in wooden crates with moisture barrier.
Q: Can I request specific straightness tolerances?
A: Yes, custom straightness down to 0.5mm/m is available for diameters under 12mm.
Q: Is magnetic annealing available?
A: Hydrogen atmosphere annealing for optimal magnetic properties can be arranged with additional lead time.
Q: How does DT4C compare to electrical steel?
A: DT4C offers 30-50% higher permeability but lower saturation flux density than silicon steel.
Q: What certification documentation is provided?
A: Mill test certificates include chemical composition, magnetic properties, and dimensional reports.
Q: Is the diameter tolerance symmetrical?
A: Tolerances follow h9 standard which is unilateral minus tolerance for precision fitting.
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