1J79 Soft Magnetic Alloy
1J79 is a high-saturation magnetic induction soft magnetic nickel-iron alloy, also known as Permalloy. The corresponding grades for this alloy include Ni79Mo4, E11c, Malloy, Permalloy, and 79HM. It is widely recognized for its excellent magnetic properties, particularly in applications requiring high permeability and low coercivity.
Table of Contents
Type of 1J79 Alloy for Supply
| Form | Thickness/Diameter | Width | Length | Additional Notes |
|---|---|---|---|---|
| Sheet/Strip | 0.05 mm – 2.0 mm | 10 mm – 400 mm | Coils or custom lengths | Commonly used for transformers, magnetic cores |
| Wire | 0.05 mm – 5.0 mm | – | Custom lengths | Suitable for inductors, sensors, and coils |
| Rod/Bar | 5 mm – 100 mm | – | 1 m – 6 m | Used in electromagnetic devices and magnetic circuits |
| Foil | 0.02 mm – 0.1 mm | 10 mm – 300 mm | Rolls | For precision applications requiring thin layers |
| Tube | Outer diameter 10 mm – 50 mm | Wall thickness 0.5 mm – 5 mm | Custom lengths | Applied in special electromagnetic and shielding devices |
Chemical composition of 1J79
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 78.5 – 80.0 |
| Iron (Fe) | Balance |
| Molybdenum (Mo) | 3.8 – 4.2 |
| Manganese (Mn) | ≤ 0.5 |
| Silicon (Si) | ≤ 0.3 |
| Carbon (C) | ≤ 0.03 |
| Phosphorus (P) | ≤ 0.02 |
| Sulfur (S) | ≤ 0.02 |
Corresponding and Similar Grades to 1J79 Soft Magnetic Alloy
| Grade | Country | Notes |
|---|---|---|
| Permalloy | International | A widely recognized name for 1J79, used in many countries |
| Ni79Mo4 | China | The Chinese equivalent of 1J79, with a similar composition |
| E11c | UK | British standard equivalent, commonly used in the UK |
| 79HM | Russia | The Russian designation for this high-permeability alloy |
| Alloy 79 | USA | American equivalent often used in soft magnetic applications |
| Magnifer 7904 | Germany | German equivalent with similar properties and applications |
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1J79 Physical Properties
- Density: 8.6 g/cm³
- Melting Point: 1397-1427°C
In the annealed state, the physical properties of 1J79 are as follows:
- Tensile Strength: ≥560 MPa
- Elongation: ≥35%
- Hardness: ≤205 Hv
1J79 Material Characteristics
1J79 is a high-saturation magnetic induction soft magnetic nickel-iron alloy, containing 79-80% nickel. It is characterized by its high initial magnetic permeability, high maximum magnetic permeability, and low coercivity. The specific magnetic properties of 1J79 are as follows:
- Saturation Magnetic Induction: Greater than 0.75T
- Initial Magnetic Permeability: Greater than 25 mH/m
- Maximum Magnetic Permeability: Greater than 125 mH/m
- Coercivity: Less than 2.4 A/m
The microstructure of 1J79 is face-centered cubic (FCC) and belongs to the austenitic structure family.
1J79 Applications
1J79 is widely used in the manufacturing of various magnetic devices and components due to its excellent soft magnetic properties. Some typical applications include:
- Magnetic amplifiers
- Magnetic regulators
- Current transformers
- Pulse transformers
- Stepper motors in electronic watches
- High-precision computers
- Choke coils
- Shielding covers
