Ed Fagan is a leading distributor of the high-magnetic-saturation alloy, Hiperco® 50A. Available from stock in the form of plate, select this soft magnetic alloy characterized by high purity in an array of thicknesses from 0.500&#; to 7.000&#;. Hiperco 50A plate conforms to ASTM A801 Alloy Type 1 and Mil A . It exhibits the highest magnetic saturation of commercially available soft magnetic alloys while maintaining low core loss as compared to electrical steel.
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Permanent magnets are graded by the maximum energy the magnet produces. Each grade of magnet material generates a Maximum Energy Product, or MGOe (Mega Gauss Oersteds). Typically, the higher the magnet grade, the higher the corresponding strength of the magnet. It is one way to measure the strength of a magnet. In electrical engineering and materials science, coercivity (also called magnetic coercivity, coercive field, or coercive force) is a measure of the ability of a ferromagnetic material to withstand an external magnetic field without becoming demagnetized.
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For ferromagnetic material, the coercivity is the intensity of the applied magnetic field required to reduce the magnetization of that material to zero after the magnetization of the sample has been driven to saturation. Coercivity then measures the resistance of a ferromagnetic material to demagnetization. Coercivity is usually measured in oersteds or ampere/meter units and is denoted as &#;Hc&#;. It can be measured using a B-H analyzer or magnetometer.
Ferromagnetic materials with high coercivity are called &#;magnetically hard materials&#; and are used to make permanent magnets. Materials with low coercivity are said to be &#;magnetically soft&#;. The latter are used in transformer and inductor cores, recording heads, microwave devices, and magnetic shielding.
Maximum Operating Temperature - The maximum temperature of exposure that a magnet can withstand without significant long-range instability (loss of magnetism) or structural changes.
Curie Temperature - Temperature at which a material loses its magnetic properties permanently.
Coercive Force, Hc - The demagnetizing force, in oersteds, required to reduce the residual induction (Br) of a fully magnetized magnet to zero (e.g. alnico has a low coercive force and can lose its strength if not stored properly).
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