⚠️【IMPORTANT NOTICE】: Images are for illustrative purposes showing measurement points. Proportions in photos do NOT represent actual visual size. Please strictly refer to the numeric parameters in the SKU text.

📦 DT4 Soft Magnetic Pure Iron Rod / High-Purity Electromagnetic Iron Bar (Fe ≥ 99.9% / Armco Grade)

📏 Specifications & Material

• 🧪 Material Grade: DT4 Electrician Pure Iron (Internationally equivalent to Armco Pure Iron / JIS SUY / Soft Magnetic Iron)

• 🔬 Chemical Purity:Fe ≥ 99.85% ~ 99.99%, ultra-low carbon (

  $\text{C}\le 0.01\%$

  ) and low trace gas content

   

• 🧲 Magnetic Properties: High permeability (

  $\mu$

  ), high saturation flux density (

  $B_s$

  ), ultra-low coercivity (

  $H_c$

  ), and near-zero remanence

   

• ⚖️ Theoretical Density: ~

  $7.87{\text{ g/cm}}^3$

  (Solid homogeneous metallic matrix, defect-free)

   

• ✨ Surface Finish: Centerless precision ground / bright polished luster / deburred clean-cut ends

💡【Dual-Attribute Size Selection Guide】

To provide maximum sizing flexibility, Diameter and Length are separated into two individual drop-down menus:

1. Ordering Steps:

   • Step ①【Select Diameter】: Open the 【Diameter】 drop-down menu and choose your required rod thickness.

   • Step ②【Select Length】: Open the 【Length】 drop-down menu and choose your desired cut length.

2. Ordering Tip:

   • The final price will calculate automatically once both parameters are selected.

   • This product is a solid cylindrical round bar. Please verify your electromagnetic coil inner bore or machining dimensions before selecting.

🛡️ Key Features

• 🧲 Superior Soft Magnetic Responsiveness: Rapid magnetic saturation upon energization and instantaneous demagnetization upon power cutoff, eliminating residual magnetic interference.

• 🔬 Ultra-Low Carbon Purity: Minimal interstitial carbon, sulfur, and phosphorus impurities prevent domain wall pinning, drastically reducing hysteresis loss and eddy currents.

• 🦾 High Ductility & Machinability: Uniform, soft metallurgical structure allows easy turning, milling, drilling, tapping, and cold bending into complex pole pieces.

• ✨ Precision Ground Surface: Centerless ground for consistent circularity and smooth bright finish, ready for immediate assembly or secondary finishing.

⚙️ Applications / Usage

• ⚡ Electromagnets & Actuators: Solenoid valve plunger cores, relay yokes, electromagnetic clutches, and linear magnetic actuators.

• 🔬 Physics & Laboratory Research: Magnetic hysteresis loop testing specimens, flux concentrators, and sensitive magnetic shielding enclosures.

• 🧲 Instruments & Audio Hardware: Speaker T-yoke cores, magnetic sensor shields, and galvanometric transducer poles.

• 🏭 Vacuum Melting & High-Purity Raw Material: Pure iron evaporation pellets/rods for vacuum coating, and melting additives for soft magnetic alloys.

📩 Custom Services & Direct Support

• 🛠️ Custom Cutting & Machining: Precision cut-to-length service, custom turned diameters, center-drilling, tapping, and CNC machining per CAD drawings.

• 📦 Bulk Wholesale Discounts: Direct manufacturer supply. Volume tiered pricing is readily available for research institutes, universities, and industrial machine builders.

• 🤝 【Communication First · Please Do Not Open Cases or Leave Negative Feedback Prematurely】:

  • We firmly believe that direct communication resolves 100% of all issues.

  • Official dispute cases and platform return procedures involve automated review delays and complex international return paperwork. Before opening a dispute case or leaving neutral/negative feedback, please give us the courtesy to assist you directly.

  • Pure iron is sensitive to moisture (protective rust-preventative oil is applied prior to shipping). If your package encounters transit damage, surface corrosion from damaged packaging, or carrier delays, please contact us directly via eBay Messaging.

  • We guarantee a 100% satisfactory resolution (free express replacement or full refund) within 24 hours, keeping your project on track.