Vicalloy Wire（W.Nr. 2.4713,UNS K92839 / K92841)
Product Introduction
Vicalloy (W.Nr. 2.4713, UNS K92839 / K92841, 2J10) is an age-hardenable, machinable permanent magnet alloy based on an iron, cobalt, and vanadium matrix. In its annealed state, it is quite soft and can be cold-drawn into wire or cold-rolled into strip just like conventional alloys; we frequently supply this material in the annealed state in the form of rods, wires, and other shapes.
Its typical applications include:
Wiegand Sensors (Wiegand Wire): Electronic water meters, heat meters, passive rotary encoders, zero-speed sensors
Hysteresis Motors: Motor rotors, hysteresis brakes
Precision Instruments: Nautical compasses, gyroscopes, magnetic encoding devices
Micro-motors: DC motor excitation coils, miniature permanent magnet rotors
Aerospace: Navigation gyroscopes, magnetic components for satellite attitude control
Comparison with Similar Materials
| Comparison Item | Vicalloy | AlNiCo | NdFeB (N35) | Ferrite |
| Processing Method | Cold Forming | Casting/Sintering | Sintering + Grinding | Sintering |
| Does it string? | Yes | No | No | No |
| Heat Treatment Process | Solution Treatment + Aging | Casting + Tempering | Sintering + Coating | Sintering |
| Coercivity (kA/m) | 14-28 | 50-150 | >900 | 100-300 |
| Maximum Energy Product (kJ/m³) | 8-21 | 10-40 | 200-300 | 5-30 |
| Ductility | Good | Poor | Terrible | Poor |
| Cobalt Content | 52% | 24-40% | 29% | - |
Selection Logic: For permanent magnets requiring wire drawing, strip rolling, or stamping capabilities, Vicalloy is virtually the only choice; for applications where complex shapes are unnecessary and the objective is to maximize magnetic energy product, Neodymium-Iron-Boron is the preferred option; and for scenarios demanding high temperature stability, Alnico is the ideal selection.
Machining and Welding
The sequence of operations must not be disrupted; the degree of deformation is the critical factor. This constitutes the most fundamental threshold for Vicalloy-the direction and magnitude of deformation directly determine the quality of the final magnetic properties.
1. Process Route - A Three-Step Approach
Its standard process route is clearly defined: Solution Annealing → High-Deformation Cold Working → Aging. The sequence must not be altered, and the degree of deformation must not fall short.
2. Cold Working - Insufficient Deformation Results in Subpar Performance
"If the cold-drawing reduction falls short of 80%, the γ-phase cannot be effectively transformed into the α-phase; consequently, the magnetic properties achieved during the subsequent aging process will be significantly inferior. Therefore, simply drawing the material into a wire is not sufficient; the specific degree of deformation serves as a critical, non-negotiable parameter."
3. Aging - "Baking In" the Magnetic Properties
4. Specialized Processes for Wiegand Wire
5. Machining - Avoid Mechanical Processing After Aging
6. Surface Treatment - If nickel or zinc plating is required to extend service life, the specific plating process must be verified prior to execution (particular attention must be paid to the potential risk of hydrogen embrittlement when dealing with high-strength materials).
For more information, please contact:
Email: susan@lorkgroup.com
WhatsApp: +86 19937075488
Chemical Composition
(2J10, Vicalloy )
| element | Content Range |
| Fe | Bal |
| Mo | ≤0.12% |
| Cr | ≤4% (Selected grades) |
| V | 9-13% |
| Co | 50-53% |
Mechanical Properties
| Material | Numerical Value |
| Elastic Modulus | 186 GPa |
| Coefficient of thermal expansion | 12.0 ppm/°C |
| Curie temperature | 855℃ |
An easily overlooked point: after aging, Vicalloy can reach a hardness of HRC 60-putting it on par with tool steel. If you purchase the material in its aged state and attempt to perform precision machining on it, it is essentially a lost cause. Therefore, it is absolutely essential to complete all machining and shaping before subjecting the material to the final aging treatment.
Mechanical and Magnetic Properties
| Performance | Numerical Value |
| Density | 8.16 g/cm³ |
| Coercivity (Hc) | 14.3–18.3 kA/m (180–230 Oe) |
| Remanence (Br) | 0.9–1.2 T |
| Saturation Magnetic Flux Density Approx | Approximately 1.3 TB |
| Maximum Energy Product (BH)max | 8–21 kJ/m³ |
| Operating Temperature Range | -196°C to +300°C (Wiegand wire capable of reaching 300°C) |
Technical Consultation Prior to Quotation
We have compiled a summary of key technical parameters for Vicalloy-covering the key points frequently discussed during past inquiries and purchase orders-aimed at facilitating rapid quotation.
Diameter: The diameter range for standard products is 0.05–5.0 mm; Wiegand wire typically ranges from 0.25 to 0.51 mm (0.010–0.020 inches).
Form: Straight lengths, coils, or custom-cut lengths.
Condition: Cold-worked state (soft/semi-hard) or aged state (hard magnetic)?
Wiegand Wire: Is a special torsion-aging treatment required?
Recommendations for Selecting the Condition:
- Customers with in-house heat treatment capabilities → Purchase in the cold-worked state.
- Products intended for direct, immediate use → Purchase in the aged state.
- Customers manufacturing Wiegand sensors → Purchase finished Wiegand wire that has undergone the special torsion and aging treatment.
- For ultra-fine wires (<0.1 mm) with extremely small diameters, the drawing process is complex; consequently, both lead times and costs will be significantly affected.
Optional: Documents Required
- Magnetic Property Test Report (coercivity, remanence, etc.)
- MTC Material Certificate (including chemical composition and heat treatment records)
- Dimensional Inspection Report (diameter tolerance)
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