High Perm 49®

High Permeability 49 ® is a soft magnetic, 48% nickel-iron alloy that possesses the highest saturation flux density of any nickel-iron alloy. This alloy is used where efficient conduction of magnetic fields is critical offering low magnetizing forces, a high saturation flux density and low core loss.

Properties and Appearance

High Perm 49 ® exhibits low magnetostriction, meaning it doesn’t deform significantly when magnetized, which is important for minimizing noise in applications like transformers and sensors. Its combination of high permeability, low losses, and good stability makes it a go-to material for many high-tech and industrial applications.

• Magnetic Permeability: The alloy has an exceptionally high magnetic permeability, often exceeding 100,000, which allows it to conduct magnetic flux very efficiently.
• Magnetic Stability: The alloy is stable under various magnetic field strengths and can be easily magnetized and demagnetized.
• Saturation Magnetization: While it has a lower saturation magnetization compared to pure iron, it is sufficient for many applications requiring high permeability.
• Coercivity: High Perm 49 ® exhibits very low coercivity, which means it can easily switch its magnetization direction without significant energy loss.
• Electrical Resistivity: The alloy has moderate electrical resistivity, helping reduce eddy current losses in alternating magnetic fields.
• Curie Temperature: The Curie temperature, where the material loses its ferromagnetic properties, is typically around 450-500°C.
• Thermal Stability: The alloy has good thermal stability, maintaining its magnetic properties over a range of temperatures.
• Corrosion Resistance: It has moderate corrosion resistance; protective coatings may be required in harsh environments.
• Density: The density of High Perm 49 ® is approximately 8.6 g/cm³.
• Easy Fabrication: High Perm 49 ® can be easily formed, machined, and welded, making it versatile in manufacturing processes.
• Appearance: It appears as a dark gray metal with some shine. High Perm 49 ® is a shielding alloy.

For more detail see High Perm 49 ® Properties Datasheet. You can also find out more about Shielding Alloys here.

Applications and Uses:

High Perm 49 ® is a great choice when high permeability is required whereas nickel alloy may be a good choice where medium permeability is needed, (frequently, these materials are used together).

The saturation flux density of about 16000 gauss (1.6 Tesla) combined with high magnetic permeability and low core loss makes this a versatile alloy with many potential applications such as laminated cores, magnetic shields, electronics and communication devices. It is highly sought after in aerospace and defense industries, for research and education, as well as automotive, and commercial fields.

Here are some application examples:

• Magnetic Shielding: Due to its high permeability, High Perm 49 ® is often used in magnetic shields to protect sensitive electronic equipment from external magnetic fields.
• Magnetic Amplifiers: The material’s properties make it suitable for use in magnetic amplifiers, where precise control of magnetic fields is necessary.
• Relays: In electromagnetic relays, High Perm 49 ® is used for its efficient magnetic field conduction.
• Magnetic Sensors: Its low coercivity and high permeability make it ideal for magnetic sensors and detectors, where sensitivity to weak magnetic fields is crucial.
• Medical Devices: High Perm 49 ® is employed in medical imaging devices, such as MRI machines, to ensure high magnetic field efficiency and stability.
• Aerospace: The alloy is used in aerospace applications, particularly in components that require efficient magnetic field management.
• Power Supply Chokes: High Perm 49 ® is utilized in power supply chokes to improve efficiency and reduce losses.
• Transformers: The alloy is used in the cores of transformers, especially where low losses and high efficiency are required.
• Inductors: High Perm 49 ® is used in the cores of inductors for high-frequency applications.
• Telecommunications: The alloy is used in various components of telecommunications equipment, where efficient magnetic performance is required.

High Perm 49 ® Formats Supplied

Vulcan Metal Group supplies High Perm 49 ® in bar rounds, billet, sheet, strip, wire and wire shapes. We can make custom machined and finished parts supplied to print from materials we supply.

Request a quote for High Perm 49 ® or Contact us for more information on how Vulcan Metal Group can help you.

Vulcan Metal Group is certified to ISO 9001:2015, AS9100D, and is ITAR compliant. These credentials are just the starting point for our commitment and your minimum guarantee of quality and compliance with industry standards.