Electromagnets
Copper Wire (insulation application dependent)
Permanent Magnets
Nd-Fe-B – Highest Strength/volume, moderate cost., moderate temperature extremes (150°C),
Sm-Co – High Strength/volume, highest cost, high temperature extremes (300°C)
Ceramic – Low Strength/volume, lowest cost, high temperature extremes (300°C)
Alnico – Moderate to High Strength/volume, high cost, highest temperature extremes (450°)
Frame Materials
Carbon Steels (1010, 1045) – high saturation flux, low cost, poor corrosion resistance
Martensitic Stainliess Steels (416, 430) – moderate-high saturation flux, moderate cost, good corrosion resistance
Nickel Super Alloys (Hiperco®) – highest saturation flux, highest cost, excellent corrosion resistance