Alnico Magnets characteristics:

• Very temperature stable, great for high heat applications
• Maximum working temperature: 975° -1020°F
• May be ground to size
• Does not lend itself to conventional machining (hard & brittle)
• High residual induction and energy product compared to ceramic. Low coercive force compared to ceramic and rare earth materials (more subject to demagnetization)
• Most common grades of alnico are 5 & 8
• Applications: sensors, meters,generators, educational,telcomunications,

  Alnico Magnetic Characteristics.pdf

Physical Properties of Cast Alnico
Curie Temperature (℃)	760-890
Max. Operating Temperature (℃)	450-550
Resistivity (μohm.cm)	47-54
Hardness (Hv)	520-630
Density (g/cm⊃3;)	6.90-7.30
Relative Recoil Permeability (μrec)	1.70-4.70
Saturation Field Strength (kOe,kA/m)	2.7-6.3/215-500
Temperature Coefficient of Br (%/℃)	-0.025 ~ -0.02
Temperature Coefficient of iHc (%/℃)	+0.01 ~ +0.03

Cast Alnico Process Chart
Raw material -> forming- >smelting-> heat treatment-> surface treatment->precision grinding->inspection ->packing
Sintered Alnico Process Chart
Raw material ->powder-> forming-> sintered- >heat treatment-> surface treatment->precision grinding –>inspection- >packing



Alnico Magnet Applications:
 
Precision magnetic sensors for balance
Guitar pickups
Sensitive Relays and transformers
Speakers