3J21 Alloy: High-Nickel Magnetic Material With Excellent Permeability, Low Core Loss.

3J21 Alloy Product Description

Overview: 3J21 alloy is a high-nickel, soft magnetic material with excellent magnetic permeability and low core loss characteristics. It is primarily used in applications where high magnetic performance and stability are crucial, such as in transformers, inductors, and other electronic components.

Chemical Composition:

• Nickel (Ni): 80%
• Iron (Fe): Balance
• Other Elements: Trace amounts of impurities and alloying elements

Physical Properties:

• Density: Approximately 8.4 g/cm³
• Melting Point: Around 1450°C (2642°F)
• Thermal Conductivity: ~13 W/(m·K)
• Electrical Resistivity: ~1.2 μΩ·m

Mechanical Properties:

• Ultimate Tensile Strength: ~700 MPa (approximate)
• Yield Strength: ~600 MPa (approximate)
• Elongation: ~25% (approximate)
• Hardness: ~200 HB (Brinell)

Magnetic Properties:

• Magnetic Permeability: High
• Core Loss: Low
• Saturation Flux Density: ~1.2 T (approximate)
• Curie Temperature: ~500°C (932°F)

Corrosion Resistance:

• Exhibits good resistance to oxidation and corrosion in various environments, making it suitable for use in harsh conditions.

Applications:

• Transformers: Used in transformer cores due to its high magnetic permeability and low core loss.
• Inductors: Ideal for high-performance inductors requiring stable magnetic properties.
• Magnetic Shielding: Employed in applications needing effective magnetic shielding and containment.

Fabrication and Processing: 3J21 alloy can be processed using conventional methods such as stamping, machining, and heat treatment to achieve desired magnetic and mechanical properties. It is often used in thin-sheet form or as laminations to reduce eddy current losses.

Advantages:

• High magnetic permeability improves efficiency in magnetic circuits.
• Low core loss contributes to energy savings in electronic components.
• Good mechanical properties and corrosion resistance enhance durability and performance.

Packaging and Delivery: 3J21 alloy is available in various forms including sheets, strips, and laminations, and can be customized based on specific application requirements. It is packaged to prevent damage during transport and storage.