Magcraft Magnets . MFM 0.5” X 0.375” Rare Earth Disc Magnet (6)

SPECIFICATIONSThese disc magnets are 0.500 inch (12.7mm) diameter and 0.375 inch (9.5mm) thick. They are magnetized through the thickness. They are composed of grade 40 neodymium iron boron magnetic material and are plated in nickel-copper-nickel for a shiny corrosion resistant finish. Maximum working temperature is 176 F (80 C). Part Number NSN0642 Imperial Dimensions 0.5 inch diameter x 0.375 inch thick Metric Dimensions 12.7mm diameter x 9.525mm thick Material Sintered Neodymium-Iron-Boron (NdFeB) Shape Disc Plating Ni-Cu-Ni (Nickel) Magnetization Direction Thickness Grade N40 Pull Force (lbs[g]) 16.03[7271] Surface Field(G) 4912 Maximum Operating Temperature 80 Deg C (176 Deg F) Dimensional Tolerance +/-0.005" Magnet Quantity 6 Volume (cm3) 1.21 Weight (g) 9.05 Brand Magcraft Packaging Magpak Tube UPC 875661000429 Remanent Flux Density Br (kG [T]) 12.5-12.8 [1.25-1.28] Coercivity HcB (kOe [kA/m]) >=11.3 [>=923] Intrinsic Coercivity HcJ (kOe [kA/m]) >=12.0 [>=995] Maximum Energy Product Bhmax (MGOe [kJ/m3]) 38-41 [302-326] Density p(g/cm3) >=7.45 Compression Strength (Mpa) 600-1200 Bending Strength (Mpa) 150-380 Vickers Hardness (HV) 460-660 Recoil Permeability (urec) 1.05 Electrical Resistance (Ohm*mm2/m) 1.25-1.55 Curie Temperature Tc (°C) 310 Thermal Expansion Coefficient 100°C//(x10^-6/K) 6 Thermal Expansion Coefficient 100°C?(x10^-6/K) -1