Soft Magnetic Shielding alloy 1J79
Chemcial composition
Alloy | % | Ni | Mo | Cu | C | Si | Mn | P | S |
1J79 | Min. | 78.5 | 3.8 | 0.3 | 0.6 | ||||
Max. | 80 | 4.1 | 0.2 | 0.03 | 0.5 | 1.1 | 0.02 | 0.02 |
1J79 Phycial propertities:
Denity | 8.6 g/cm³ |
Melting Point | 450°C |
1J79 minimum mechanical properties in the room temperature
Alloy | Shape | Propertities | |||
μO(mH/m) | μm (mH/m) | Hc (A/m) | Bs(T) | ||
1J79 | Cold Rolled strip | ≥31 | ≥250 | ≤1.2 | 0.75 |
| Bar, wire, plate | ≥25 | ≥125 | ≤2.4 | 0.75 | |
Specifications
permalloy, permalloy 80,
Permalloy is a kind of soft magnetic alloy,normally refers to 20% iron and 80% nickle content.
Permalloy is a kind of soft magnetic alloy,normally refers to 20% iron and 80% nickle content.
PERMALLOY ALLOY
Note:
Permalloy is also known as 1J79,1J85 in China(Chinese Standard).
Permalloy has a high magnetic permeability,loe coercivity,near zero magnetostriction,and significant anisotropic magnetoresistance.The low magnetostriction is critical for industrial applications,where variable stresses in thin films would otherwise cause a ruinously large variation in magnetic properties.Permalloy's electrical resistivity generally varies within the range 5% depending on the strength and the direction of an applied magnetic field.Permalloys typically have the face centered cubic crystal structure with a lattice constant of approximately 0.355nm in the vicinity of a nickel concentration of 80%.
Permalloy alloy physical properties available:Permalloy wire,also in bar,plate,sheet ,foil,etc.
Applications:
1.EI core,magnetic head core,magnetic shield case,head case,cassette tape magnetic shield plate,parts of watch,transducer,etc.
2.Permalloy is used in transformer laminations and magnetic recording head sensors,in its initial application,permalloy was wrapped around the insulated copper conductors of telecommunication cables,reducing signal distortion through improved inductive compensation of cable capacitive reactance.
3.It is widely used for fabricating the thin pieces that are laminated to form trasformer cores.
Classification | Alloy | Main chemical compositions (expect Fe) | Application | Magnetic hysteresis loop |
| high permeability and low coercive iorce in a weak magnetic field | 1J79; 1J80; 1J85; 1J851; 1J86 | 75%-83%Ni Cu and Mo etc | zero phase current mutual inductor. Power transducer precision current mutual inductor. Magnetic amplifier.switching made power supplier.magnetic shielding | common magnetic hysteresis loop |
| high permeability and high saturation magnetic induction | 1J55;1J50;1J50cd;1J46 | 45%-55% Ni | power transformer. Reactor pulse transformer | |
| high squareness ratio:higher saturation magnetic induction and maximum permeability | 1J34 | 33%-41% Ni; 25%-30% Co 2%-45 Mo | double polarity pulse transformer.direct current voltage transducer magnetic amplifier.magnetic modulator and pinnacle suppresser | square shape magnetic hysteresis loop |
| 1J40 | ||||
| 1J51 | 45%-67% Ni 1%-2% Mo | |||
| 1J52 | ||||
| 1J67 | ||||
| 1J86 | same as 1J86 | |||
| relatively constant permeability within a certain range of magnetic field temperature and irequency | 1J34h | 30%-35% Ni; 25%-60% Co Mo Nb etc | constant inductor.uni-polarity pulse transformer | flat magnetic hysteresis loop |
| 1J34kh | ||||
| 1J50h | same as 1J50 | |||
| 1J522 | ||||
| 1J66 | 64%-67% Ni Mo Mn | |||
| 1J67 | ||||
| 1J6721 | ||||
| 1J79h | same as 1J79 |
| Contact Person : | Andrew |
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