Hiperco® 50A Alloy Supply : Vulcan Metal Group

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Hiperco® 50A is a high-permeability, soft magnetic alloy that belongs to the family of iron-cobalt-vanadium (Fe-Co-V) alloys. This alloy is known for its exceptional magnetic properties, making it well-suited for applications in electromagnetic devices where high magnetic permeability and low core losses are crucial. Here are some key features and applications of Hiperco® 50A:

Key Features:

High Magnetic Permeability:

• Hiperco® 50A exhibits high magnetic permeability, making it ideal for applications where magnetic flux needs to pass through the material with minimal resistance.

Low Core Losses:

• The alloy has low core losses, which means it dissipates minimal energy as heat when subjected to alternating magnetic fields. This property is essential for efficient performance in electromagnetic devices.

High Saturation Induction:

• Hiperco® 50A has a high saturation induction, meaning it can withstand and maintain a strong magnetic field without becoming saturated.

High Curie Temperature:

• The Curie temperature is the temperature at which a material loses its magnetic properties. Hiperco® 50A has a relatively high Curie temperature, allowing it to maintain its magnetic characteristics at elevated temperatures.

Applications:

Link to Youngson

Electromagnetic Devices:

• Hiperco® 50A is commonly used in the construction of cores for electromagnetic devices such as transformers, inductors, and magnetic shields.

Magnetic Actuators:

• The alloy is employed in magnetic actuators and sensors where a controlled and efficient response to magnetic fields is required.

Aerospace and Defense:

• Due to its high permeability and low core losses, Hiperco® 50A finds applications in aerospace and defense systems, particularly in components requiring precise control of magnetic fields.

Electric Motors and Generators:

• The alloy is used in the production of cores for electric motors and generators where high magnetic permeability and low core losses are critical for efficiency.

Medical Devices:

• Hiperco® 50A may be utilized in certain medical devices, particularly those that require controlled magnetic properties.

It&#;s important to note that while Hiperco® 50A offers excellent magnetic properties, it is also relatively expensive compared to other magnetic materials. The alloy is often chosen for applications where its unique combination of characteristics justifies the cost.

Manufacturers and suppliers of magnetic alloys, including Hiperco® 50A, can provide detailed technical specifications and guidance on the optimal use of the material based on specific application requirements.

Hiperco 50 and Hiperco 50 HS

It is important to avoid any contamination of the finished parts during the heat treatment. All parts must be cleaned thoroughly to remove any surface contaminants prior to annealing.

Batch heat treating in a sealed retort or welded box-type furnace is recommended. Thoroughly degreased and cleaned laminations can usually be stacked without an insulating media separation. To obtain the best degree of lamination flatness, a light weight can be placed on top of the stack.  It may be necessary to determine the correct amount of weight to assure that there is no sticking of the laminations within the stack height employed.

A dry hydrogen atmosphere or a high vacuum is recommended to minimize oxide contamination of the parts during annealing. When hydrogen is employed, the entry dew point should be dryer than -60°F (-51°C) and the exit dew point dryer than about -40°F (-40°C) when the inside retort temperature is above 900°F (482°C).

Anneal parts at /°F (704/871°C) for 2 to 4 hours in dry hydrogen or vacuum and cool at 250/400°F (139/222°C) per hour until 600°F (316°C) is reached.  After any cooling rate can be employed. The exact heat treat temperature to be employed will depend upon the application and the desired compromise between magnetic and mechanical properties. With increasing temperature from ° to °F (704° to 871°C), the magnetic properties improve while the yield and tensile strengths decrease. The temperature at no time should exceed °F (871°C) as an upper limit, as the soft magnetic characteristics start to decline due to formation of an austenitic phase.

For certain A.C. applications, improved magnetic characteristics and/or lower core loss are realized by creating a thin oxide layer on the surface of the annealed laminations. The surface oxide layer can be achieved by heating in an oxygen bearing atmosphere in the range of 600° to 900°F (316° to 480°C) for about 30 to 60 minutes. The exact baking parameters must be determined for the annealing facility employed and the thickness of oxide layer desired.

Hiperco 50A

Standard Treatment

Anneal parts at /°F (857/871°C) for 2 to 4 hours in dry hydrogen or vacuum and cool at 150/350°F (83/194°C) per hour until 600°F (316 °C) is reached, after which any cooling rate can be employed.

It is important to avoid any contamination of the finished fabricated parts during the heat treatment. All parts must be cleaned thoroughly to remove any surface contaminants prior to being placed in an air-tight retort.

A dry hydrogen atmosphere or a high vacuum is recommended to minimize oxide contamination of the parts during annealing. When hydrogen is employed, the entry dew point should be dryer than -60°F (-51 °C) and the exit dew point dryer than about -40°F (-40 °C) when the inside retort temperature is above 900°F (482°C).

Optional Treatments

• Centerless Ground Bars Less Than 1.250&#; (31.75 mm) Diameter

This duplex practice is only recommended for centerless ground bars in the size range given. Larger centerless ground bars, shapes, or hot rolled bars may be subject to cracking if quenched in this manner. This is a two-step treatment where the first step conditions the material for best machinability while the second develops optimum magnetic properties.

Preheat treat 2 to 3 foot lengths at °F (°C) for about 30 minutes in air or protective atmosphere and quench bars in cold agitated water with their long axes in the vertical position. This preheat treatment develops a coarse acicular martensitic type structure which imparts ductility to the material and improves machining of the finish part.

The second part of the duplex treatment involves the employment of the standard treatment as described earlier. At no time should the temperature of the second treatment exceed °F (871°C) because of the formation of a nonmagnetic austenitic phase which transforms upon cooling, thereby degrading magnetic properties due to transformation stresses.

• For Products Produced from Any Size Bar

This practice can be applied to all parts produced from bar products, regardless of their size since no rapid quench practices are required. It provides improved capability magnetic properties on especially large cross sections compared to those of the standard heat treatment. Note, however, it is a lengthy process and, therefore, more expensive.

Heat the finish machined part in dry hydrogen or high vacuum to °F (927°C) (heating rate is not critical) and hold at °F (927°C) for three to four hours. Cool at 20°F (11°C) maximum per hour to °F (732°C), then cool to 950°F (510°C) at 200°F (111°C) per hour. Cool at any rate thereafter.

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