Initially designed for meters and instruments, AlNiCo (Aluminum Nickel Cobalt) magnets are well known for excellent temperature stability, high residual induction, and relatively high magnetic energy products since the 1930s. In the AlNiCo alloys family, isotropic and anisotropic magnets with different properties can be produced with different composition and production processes. AlNiCo can be divided to cast AlNiCo and sintered AlNiCo. When compared with cast AlNiCo, sintered AlNiCo perform with lower magnetic properties but better mechanical properties. AlNiCo are brittle and hard, not suitable for traditional maching processes except grinding processing.