Alloy 79 （Nickel-Iron Alloy 79）
Category: OTHER PRODUCTS
Alloy 79 is a specialized nickel-iron alloy known for its exceptional magnetic and electrical properties. It is widely used in electronic and precision instrumentation applications due to its high permeability, low coercivity, and excellent performance in alternating magnetic fields.
Chemical Composition
| Element | Weight Percentage (wt%) | Function |
|---|---|---|
| Nickel (Ni) | 78% - 80% | Ensures high permeability and low coercivity. |
| Iron (Fe) | Remainder (approx. 20%) | Provides structural stability and enhances magnetic performance. |
| Manganese (Mn) | ≤ 0.5% | Improves workability and stabilizes magnetic properties. |
| Silicon (Si) | ≤ 0.3% | Enhances corrosion resistance and oxidation stability. |
| Carbon (C) | ≤ 0.02% | Minimizes brittleness. |
| Phosphorus (P) | ≤ 0.02% | Controls inclusions and purity. |
| Sulfur (S) | ≤ 0.02% | Maintains material purity. |
Key Characteristics
High Permeability
Alloy 79 can achieve high magnetization levels at low magnetic field strengths, making it ideal for applications requiring efficient magnetic performance.
Low Coercivity
The alloy is easily magnetized and demagnetized, which minimizes energy losses during operation.
High Electrical Resistivity
It reduces eddy current losses, particularly in high-frequency applications.
Low Magnetic Hysteresis Loss
Alloy 79 performs well in alternating magnetic fields, offering low energy loss.
Thermal Stability
The alloy maintains its magnetic properties across a wide temperature range.
Corrosion Resistance
The addition of silicon and controlled impurities enhances its resistance to oxidation and environmental degradation.
Applications
Alloy 79 is utilized in a variety of industries for its exceptional magnetic properties. Common applications include:
Transformers
Used in power and audio transformers for efficient energy transfer with minimal losses.
Magnetic Shielding
Provides effective shielding against electromagnetic interference (EMI).
Magnetic Heads and Sensors
Utilized in precision measurement equipment and data recording devices.
Inductors and Chokes
Reduces energy loss in inductive components operating in alternating current (AC) systems.
Medical Devices
Used in MRI machines for magnetic shielding and other applications.
Aerospace and Defense
Ensures reliability in sensitive electronic components in challenging environments.
Advantages
- High Performance in AC Fields: Outstanding efficiency and low energy loss at high frequencies.
- Dimensional Stability: Resists deformation under thermal and mechanical stresses.
- Customizable Properties: Can be adjusted for specific applications by varying composition and heat treatment.
- Ease of Fabrication: Good machinability and weldability for various manufacturing processes.
Alloy 79 is the preferred material for engineers and scientists working on high-performance magnetic and electronic systems, delivering precision and efficiency across numerous applications.
Keywords: Alloy 79 （Nickel-Iron Alloy 79）
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Welcome to ZK Alloy, we are professional manufacturer for special alloy materials with twelve years experiences, we mainly produce inconel, monel, hastelloy, high temperature alloy and other nickel based alloy products, which are widely used in aerospace, oil and gas, energy and environmental, automotive, chemical, industrial valves, communication electronics and other industries.
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