Sintered Alnico
Sintered Alnico, also known as Alcomax, is a pressed composite material of Aluminium, Nickel & Cobalt so is a non corrosive material in water.
Compared with Cast Alnico Sintered Alnico was known to have slightly lower Br (remenance) and Hc (coercivity) but the differences have all but disappeared with current manufacturing processes.
Alnico magnets also have good temperature stability and a high working temperature. Their Low coercivity means that they are excellent for solenoid applications.
Benefits
High Br
Non-Corrosive in Water
Physically Hard
High Maximum Working Temp
Drawbacks
Low Hc
Unstable Price
Brittleness