Introduction
Permalloy magnetic alloy is of Fi-Ni alloy with a wide nickel content range of 35%-90%. The biggest characteristic of permalloy is high magnetic permeability of weak magnetic field. And its saturation induction density is generally within 0.6-1.0T.
Type of supply
| Style | Size |
| Wire | D= 0.1~8mm | |
| Strip | W= 8~390mm | T= 0.3mm | |
| Foil | W= 10~100mm | T= 0.01~0.1mm | |
| Rod | Dia= 8~100mm | L= 50~1000mm | |
Application
Permalloy is used in aviation industry and other electronic industries for manufacturing electronic elements with features of high sensitivity, exact size, small size, low high frequency loss, good stability of time and temperature and special function.
Chemical composition (%)
| Ni | 78.5~80.0 | Fe | Bal. | Mn | 0.6~1.1 | Si | 0.3~0.5 |
| Mo | 3.8~4.1 | Cu | ≤0.2 |
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| C | ≤0.03 | P | ≤0.02 | S | ≤0.02 |
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Mechanical property
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 980 | 1030 | 3~50 |
Physical property
| Density (g/cm3) | 8.6 |
| Resistivity under 20℃(Ωmm2/m) | 0.55 |
| Linear expansion coefficient (20℃-200℃) X10-6/℃ | 10.3~11.5 |
| Saturation magnetostrictive coefficient, λθ/ 10-6 | 2.0 |
| Curie point, Tc/ ℃ | 450 |
Magnetic property
| 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 |
| ≥ | ≤ |
| 0.01 | 17.5 | 87.5 | 5.6 | 0.75 |
| 0.1~0.19 | 25.0 | 162.5 | 2.4 |
| 0.2~0.34 | 28.0 | 225.0 | 1.6 |
| 0.35~1.0 | 30.0 | 250.0 | 1.6 |
| 1.1~2.5 | 27.5 | 225.0 | 1.6 |
| 2.6~3.0 | 26.3 | 187.5 | 2.0 |
| Hard drawn wire Diameter (mm) |
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| 0.1 mm | 6.3 | 50 | 6.4 |
| Bar Diameter (mm) |
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| 8-100 mm | 25 | 100 | 3.2 |
Heat treatment process
| Annealing medium | Dry hydrogen ( dew point is no more than -40℃) or vacuum, and the residual pressure is 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℃. |
Index
nickel iron alloy, alloy strip, alloy rod
