1J22 Soft Magnetic Alloy Strip 2.4T High Saturation Induction for Magnetostrictive Devices
1J22 Soft Magnetic Alloy (Permendur) for Magnetostrictive Devices
1. Product Overview
1J22, also known as Permendur, is an iron-cobalt-vanadium (Fe-Co-V) soft magnetic alloy with the highest saturation magnetic induction (2.2-2.4 T) among all soft magnetic materials. Combined with a high magnetostriction coefficient (60-100 ppm) and high permeability, 1J22 is the premier choice for magnetostrictive actuators, transducers, ultrasonic generators, sonar systems and torque sensors.
2. Key Advantages for Magnetostrictive Applications
- Ultra-High Saturation Induction (2.2-2.4 T): Delivers maximum magnetic energy density, enabling compact and high-power magnetostrictive devices.
- High Magnetostriction Coefficient (60-100 ppm): Provides strong and repeatable strain output for precise displacement and high-force actuation.
- High Permeability and Low Coercivity: Ensures fast response, low hysteresis loss and stable operation under high-frequency driving.
- Excellent Mechanical Strength: Withstands high vibration, shock and repeated cycling in ultrasonic and underwater acoustic applications.
- Good Temperature Stability: Maintains consistent magnetic and magnetostrictive performance over a wide operating temperature range.
3. Typical Chemical Composition
| Cobalt (Co) | 49.0-51.0% |
| Vanadium (V) | 1.80-2.10% |
| Iron (Fe) | Balance |
| Silicon (Si) | ≤ 0.30% |
| Manganese (Mn) | ≤ 0.30% |
| Nickel (Ni) | ≤ 0.50% |
| Copper (Cu) | ≤ 0.20% |
4. Magnetic Properties (Typical)
| Saturation Magnetic Induction (Bs) | 2.2-2.4 T |
| Magnetostriction Coefficient (λs) | 60-100 ppm |
| Coercivity (Hc) | ≤ 160 A/m |
| Remanence (Br) | ≤ 1.0 T |
| Maximum Permeability (μmax) | ≥ 4000 |
| Curie Temperature (Tc) | ~980 °C |
5. Physical and Mechanical Properties
| Density | 8.2 g/cm³ |
| Resistivity | 0.4 μΩ·m |
| Tensile Strength | 490-780 MPa |
| Elongation | ≥ 2% |
| Hardness | HRC 30-45 (Aged Condition) |
| Melting Point | ~1450 °C |
6. Available Forms and Specifications
Supplied as cold-rolled strip, sheet, round bar, wire and precision forgings in annealed, quenched or aged condition. Standard thickness from 0.05 mm to 3.0 mm for strip, width from 5 mm to 200 mm. Custom dimensions, tight tolerances (±0.01 mm for strip thickness) and fine surface finish (Ra ≤ 0.8 μm) available on request.
7. Heat Treatment Options
- Annealing: 750-850 °C, furnace cooling, for maximum soft magnetic properties.
- Quenching: 850-900 °C, oil or water quenching, for high hardness and mechanical strength.
- Aging: 480-520 °C for 3-5 hours, for optimal combination of hardness and ductility.
8. Typical Applications
- Magnetostrictive actuators and precision positioners
- Ultrasonic generators, transducers and welding equipment
- Sonar and underwater acoustic systems
- Torque sensors, vibration dampers and shock absorbers
- Magnetic shielding components and relay cores
- Aerospace and defense actuation systems
9. Quality Control and Packaging
Each batch is tested for chemical composition, magnetic properties and dimensional accuracy, with mill test certificates provided. Products are wrapped in waterproof paper and plastic film, then packed in export-grade wooden cases or cartons to ensure safe delivery worldwide.
Contact us for custom sizes, heat treatment specifications and volume pricing. Our engineers are ready to support your magnetostrictive device design.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.