Soft Magnetic Pure Iron Round Bar: Custom-Cut for Electromagnetic Performance
Beilun Metal delivers precision soft magnetic pure iron round bars, engineered as the foundational core material for high-performance electromagnets, relays, and transformers. We provide more than just raw material; we supply a customizable solution-available in your specified diameters and lengths-to maximize magnetic efficiency and streamline your manufacturing process. Our bars ensure high saturation flux density, low coercivity, and minimal energy loss, directly contributing to the power, responsiveness, and reliability of your electromagnetic devices.
Product Overview & Value Proposition
Our round bars are produced from high-purity iron (>99.8% Fe), with a controlled metallurgical structure optimized for superior soft magnetic properties. We understand that efficient magnetic circuits start with precisely dimensioned core stock. By offering custom diameters (from 10mm to 150mm) and cut-to-length services, we eliminate your primary material waste and machining time, delivering a component-ready product that integrates seamlessly into your production line.
Core Properties & Specifications
| Property | Specification / Benefit |
|---|---|
| Material Standard | High Purity Soft Magnetic Iron (Aligned with ASTM A848, DT4) |
| Key Magnetic Traits | High Saturation Induction (>1.8T), High Permeability, Low Coercivity & Hysteresis Loss |
| Available Diameter Range | Customizable: Standard range from Ø10mm to Ø150mm |
| Length | Custom-cut to your required length, minimizing your processing |
| Standard Condition | Annealed for optimal magnetic properties and machinability |
| Primary Application | Core material for electromagnets, relay armatures, transformer cores, and general magnetic circuits |
Frequently Asked Questions (FAQ)
Q1: How do I determine the optimal diameter and grade for my electromagnet design?
Our technical team can assist. The required diameter is primarily driven by your target magnetic flux and coil design. Please share your core geometry and performance goals (e.g., required pull force, inductance) for a tailored recommendation.
Q2: Do you perform stress-relief annealing after cutting the bars to length?
A: Yes. For applications where magnetic performance is critical, we strongly recommend and provide a final stress-relief anneal after cutting. This process removes machining stresses that can degrade permeability and increase core loss.
Q3: What tolerances can you hold on diameter and cut length?
A: We typically hold a diameter tolerance of ±0.1mm for cold-drawn bars. Cut-length tolerance is typically ±1.0mm. Tighter tolerances are available upon request and will be specified in your quotation.
Q4: Can I order a single bar for prototyping, or is there a minimum order quantity (MOQ)?
A: We support prototyping. While production MOQs apply for custom diameters, we can often supply sample lengths from existing stock sizes for your testing and validation.
Q5: How does your material ensure fast response in relays and actuators?
A: The low coercivity of our soft magnetic iron means it magnetizes and demagnetizes with minimal energy input and delay. This "fast magnetic switching" is essential for the rapid on/off cycles in relays and solenoids.
Q6: What information do you need to provide a quotation?
A: Please specify: 1) Material Grade (e.g., DT4E), 2) Diameter, 3) Cut Length, 4) Quantity (pieces or total weight), and 5) any special requirements (tolerance, finish, certification).
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