Thank You for Your Attention on Beiye!
1J85 is a kind of nickel-iron-molybdenum soft magnetic alloy which has extremely high initial permeability and maximum permeability with low coercive force, low hysteresis loss, low eddy-current losses and low magnetostriction in low-intensity magnetic field. Similar alloy's names in different standards:
Beiye designation | China Standard designation | America designation | Japan designation | Germany designation | International designation |
1J85 | Alloy4 | PC | NiFe15Mo | E1 |
Sensors
Transformers
Filters
Relays
Amplifiers
Loudspeakers
Flux concentrators
Earth leakage circuit breakers
Shielding
C | 0.02 | Ni | 80.0 |
Si | 0.25 | Mo | 5.0 |
Mn | 0.50 | Fe | bal. |
DC | AC, 50Hz | |
Thickness | 0.35mm (0.014in) | 0.35mm/0.014in |
Saturation Induction (at 80A/m) | 0.75T (7500Gs) | - |
Coercive force | 0.50A/m (0.00625Oe) | - |
Initial permeability (at 0.08A/m) | 125mH/m(100 000Gs/Oe) | 75mH/m(60 000Gs/Oe) |
* Typical values measured on rings sample after annealed at 1180°C in pure & dry Hydrogen and then tempered.
Soft | Hard | |
Hardness | 150 HV | 342 HV |
Yield Strength | 210 MPa (30.45 ksi) | 940 MPa (136.3 ksi) |
Tensile Strength | 560 MPa (81.2 ksi) | 1140 MPa (165.3 ksi) |
Elongation | 40% | 2.5% |
* Typical values for material tested in accordance with GB/T 4340.3, GB/T 228, GB/T 22315.
Density | 8.7 g/cm3 (0.31lb/in3) |
Melting Point | 1450 ℃ (2642oF) |
Curie temperature | 400 ℃ (752oF) |
Thermal expansion(20~100℃) | 10.9×10-6/℃ |
| Resistivity | 56 µΩ•cm |
Thermal conduction | 19 W/K |
In-process annealing: To relieve all strains and restore the alloy to a soft condition suitable for further cold rolling or drawing, forming, bending or similar operations, anneal at 1020~1080℃ for not more than 1 hour. Since the high nickel, high permeability alloys readily absorb carbon, sulfur, oxygen and other contaminants from combustion furnace gasses, in-process annealing should be conducted in dissociated ammonia, hydrogen, vacuum or inert gas atmospheres.
Final annealing: For maximum softness and optimum magnetic electrical properties, the cold deformed 1J85 alloy should be annealed in an oxygen-free, dry hydrogen atmosphere with a dew point below -40℃ at 1180℃ for 3~5 hours and then tempered.
Oil, grease, lacquer and all other contaminants must be removed before annealing. The individual parts should be separated by an inert insulating powder such as magnesium and aluminum oxide during hydrogen annealing.
Vacuum heat treatment could be used, but generally it results in a sacrifice in magnetic properties compared to heat treating in a dry hydrogen atmosphere.
