Type Analysis | Description | Physical Properties | Magnetic Properties
Workability | Heat Treatment | Typical Mechanical Properties

Type Analysis

Description

Hiperco 50A alloy is a soft magnetic alloy which has been used primarily as magnetic core material in electrical core material in electrical equipment requiring high permeability values at very high magnetic flux densities.
The magnetic characteristics of this alloy permit weight reduction, reduction of copper turns, and insulation in the end product when compared to other magnetic alloys having lower permeabilities in the same magnetic field range.

Physical Properties

Specific gravity.........................................8.20
Density
lb/cu in ................................................... 0.295
kg/cu m ................................................... 8200
Electrical resistivity
ohms c/mf ................................................ 253
microhm-mm ........................................... 420

Mean Coefficient of Thermal Expansion

Curie Temperature
°F ........................................................... 1710
°C ............................................................ 932
Saturation induction at
H = 250 oersteds(kilogausses) .................. 23
H = 19.9 at/m(Telsa) ................................ 2.3
Saturation magnetostriction
change in unit length x 10(-6) .................. 60

Magnetic Properties

Typical D.C. Magnetic Properties - Hiperco Alloy 50A
Solid ring specimen using ASTM-A-596 test method. Material heat treated to indicated temperatures.

Workability

Machinability
The following charts include typical machining parameters used to machine Hiperco 50A alloy. The data listed should be used as a guide for initial machine setup only.

• When using carbide tools, surface speed feet/minute (SFPM) can be increased between 2 and 3 times over the high speed suggestions. Feeds can be increased between 50 and 100%.

• Figures used for all metal removal operations covered are average. On certain work, the nature of the part may require adjustment of speeds and feeds. Each job has to be developed for best production results with optimum tool life. Speeds or feeds should be increased or decreased in small steps.

Heat Treatment

When selecting a heat treating temperature for the application, two factors should be considered:

• 1. For best magnetic characteristics, select the highest suggested temperature.

• 2. If the application requires specific mechanical properties higher than that produced when employing the highest temperature, select the temperature that will provide desired mechanical properties.

As temperature decreases, magnetic properties become less magnetic. Heat treating temperature for best magnetic properties should be 1625°F +/- 25°F (885°C +/- 15°C).Do not exceed 1652°F(900°C).
The heat treating atmosphere used must be nonoxiding and noncarburizing. Atmospheres such as dry hydrogen or high vacuum are suggested. Time at temperature should be two to four hours. Cool at a rate of nominally 180 to 360°F (100 to 200°C) per hour to a temperature of least 700°F(370°C), then cool naturally to room temperature.

Typical Mechanical Properties

Effect of Heat Treating Temperature on Hardness - Hiperco 50A alloy

Permendur 2V - Current Inventory Stock