1J50 NiFe Soft Magnetic Alloy
Key Properties of 1J50 Soft Magnetic Alloys
1. Magnetic Characteristics
High initial permeability (μi) – Enables efficient magnetization under weak magnetic fields.
High saturation induction (Bs) – Supports strong magnetic flux density.
Low coercivity (Hc) – Reduces energy loss during magnetization reversal.
Low hysteresis loss – Enhances efficiency in AC applications.
2. Electrical and Physical Properties
Low resistivity – While beneficial for DC applications, this increases eddy current losses in AC use.
Thickness-dependent performance – Thicker materials lead to higher eddy current losses, necessitating thin laminations.
Frequency sensitivity – Performance declines at higher frequencies due to increased skin effect and eddy currents.
Chemical composition (%)
| Ni | 49.0~51.0 | Fe | Bal. | Mn | 0.3~0.6 | Si | 0.15~0.3 |
| Mo | - | Cu | ≤0.2 | S | ≤0.02 | ||
| C | ≤0.03 | P | ≤0.02 |
Type of supply
| Style | Size | ||
| Wire | D= 0.1~8mm | ||
| Strip | W= 8~390mm | T= 0.3mm | |
| Foil | W= 10~100mm | T= 0.01~0.1 | |
| Rod | Dia= 8~100mm | L= 50~1000 | |
Mechanical property
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 685 | 780 | 3~35 |
Physical property
| Density (g/cm3) | 8.2 |
| Resistivity under 20℃(Ωmm2/m) | 0.45 |
| Linear expansion coefficient (20℃-200℃) X10-6/℃ | 9.2 |
| Saturation magnetostrictive coefficient, λθ/ 10-6 | 25 |
| Curie point, Tc/ ℃ | 500 |
Magnetic property
| 1J50 | Initial magnetic permeability | Max.magnetic permeability | Coercive force | Saturation induction intensity |
| Cold rolled strip/sheet material thickness, mm | μ0.08/ (mH/m) | μm/ (mH/m) | Hc/ (A/m) | Bs/T |
| ≥ | ≤ | |||
| 0.05 mm | 2.5 | 35 | 20 | 1.5 |
| 0.1~0.19 mm | 3.8 | 43.8 | 12 | |
| 0.2~0.34 mm | 4.4 | 56.3 | 10.4 | |
| 0.35~1.0 mm | 5 | 65 | 8.8 | |
| 1.1~2.5 mm | 3.8 | 44 | 12 | |
| Bar | ||||
| 8-100 mm | 3.1 | 25 | 24 | 1.5 |
Heat treatment process
| Annealing medium | Dry hydrogen ( dew point is no more than -40℃) or vacuum, with a residual pressure of no more than 0.1Pa |
| Heating temperature and speed | 1100~1150℃ |
| Heat preservation (h) | 3~6 |
| Cooling speed | Be cooled to 600℃ at a speed of 100 ~ 200 ℃/ h, then be quickly cooled to 300℃, discharging from the furnace. |
Applications
Electronics: The 1J50 Soft Magnetic Alloys are widely used to fabricate sophisticated electronic components such as magnetic heads and disk drives, enhancing the functionality and reliability of electronic devices.
Communications: The alloy is used to produce precise antennas and signal amplifiers, improving communication systems' efficiency and clarity.
Aerospace and defense: Its reliability and precision make it suitable for critical aerospace and defense applications, including sensors and permanent magnets, ensuring performance under demanding conditions.
