Magnetic Properties of Ferromagnetic Materials
Material | Treatment | Initial Relative Permeability | Maximum Relative Permeability | Coercive Force | Remanent Flux Density |
Iron, 99.8% pure | Annealed | 150 | 5000 | 1.0 | 13,000 |
Iron, 99.95% pure | Annealed in hydrogen | 10,000 | 200,000 | 0.05 | 13,000 |
78 Permalloy | Annealed, quenched | 8,000 | 100,000 | .05 | 7,000 |
Superpermalloy | Annealed in hydrogen, controlled cooling | 100,000 | 1,000,000 | 0.002 | 7,000 |
Cobalt, 99% pure | Annealed | 70 | 250 | 10 | 5,000 |
Nickel, 99% pure | Annealed | 110 | 600 | 0.7 | 4,000 |
Steel, 0.9% C | Quenched | 50 | 100 | 70 | 10,300 |
Steel, 30% Co | Quenched | ... | ... | 240 | 9,500 |
Alnico 5 | Cooled in magnetic field | 4 | ... | 575 | 12,500 |
Silmanal | Baked | ... | ... | 6,000 | 550 |
Iron, fine powder | Pressed | ... | ... | 470 | 6,000 |
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Index
Tables
Reference Brown |