Introduction
1J50 is a soft magnetic alloy. Soft magnetic alloys are magnetic alloys that are easily magnetized under the action of external magnetic fields, and the magnetic induction intensity basically disappears after removing the magnetic field. Soft magnetic alloys are divided into low-carbon electrical steel and Armko iron, silicon steel sheet, nickel-iron soft magnetic alloy, iron-cobalt soft magnetic alloy, iron-silicon aluminum soft magnetic alloy, etc. In the power industry, soft magnetic alloys mainly use alloys with high magnetic induction and low iron core loss under relatively off-magnetic fields. In the electronics industry, alloys with off-magnetic permeability and low coercivity under low-medium magnetic fields are mainly used. At high frequencies, thin strips or more ion resistivity alloys must be used. All strands are made of plates or strips.
Chemical composition
| Brand number | Chemical composition (mass fraction)% |
| 1J50 | C | P | S | Mn | Si | Ni | Cr | Co | Mo | Cu | Fe |
| ≤0.03 | ≤0.02 | ≤0.02 | 0.3-0.6 | 0.15-0.30 | 49-50.5 | - | - | - | 0.20 | margin |
Mechanical properties
| Resistivity μΩ·m | Density g/cm3 | Curie point ℃ | Saturated magnetostrictive coefficient | Brinell hardness HBS | Tensile strength MPa | Yield Strength MPa | Elongation % |
| 0.45 | 8.2 | 500 | 25 | Cold and hard | Soft | Cold and hard | Soft | Cold and hard | Soft | Cold and hard | Soft |
| 170 | 130 | 170 | 130 | 170 | 130 | 170 | 130 |
Average coefficient of expansion
| Linear expansion coefficient within the following temperature range /(x10-6/℃) |
| 20-100℃< | 20-200℃ | 20-300℃ | 20-400℃ | 20-500℃ | 20-600℃ | 20-700℃ | 20-800℃ | 20-900℃ |
| 8.9 | 9.27 | 9.2 | 9.2 | 9.4 |
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Application areas
The iron cores, pole boots, headphone diaphragms, ground leakage short circuits, gas safety valves, magnets, gyroscopes, automatic synchronization motors, electronic meter micro motors, etc. used in medium magnetic fields.