Top Grade Unique Reed Switch Magnets/alnico Magnets

Top grade unique reed switch magnets/alnico magnets ndfeb neodymium permanent magnet, ring shaped magnet 1) Strong magnetic force 2) High intrinsic coercive force Feature of reed switch magnets/alnico magnets: 1) Material: Sintered/bonded Neodymium-Iron-Boron; 2) Grade:N33-N52,33M-48M,33H-48H,30SH-45SH,30UH-38UH and 30EH-35EH;29AH-34AH,28/30TH 3) Shape: ring,block,disc,bar and so on; 4) Size: according to customers' request; 5) Coating: Expoxy Resin Ni 6) Application: sensors,motors, rotors, wind turbines,wind generators, loudspeakers,magnetic holder, filters automobiles and so on. The table below compares the magnetic performance of neodymium magnets with other types of permanent magnets. Magnet Mr (T) Hci (kA/m) BHmax (kJ/m3) TC (°C) Nd2Fe14B (sintered) 1.0–1.4 750–2000 200–440 310–400 Nd2Fe14B (bonded) 0.6–0.7 600–1200 60–100 310–400 SmCo5 (sintered) 0.8–1.1 600–2000 120–200 720 Sm(Co, Fe, Cu, Zr)7 (sintered) 0.9–1.15 450–1300 150–240 800 Alnico (sintered) 0.6–1.4 275 10–88 700–860 Sr-ferrite (sintered) 0.2–0.4 100–300 10–40 450 Physical and mechanical properties Comparison of physical properties of sintered neodymium and Sm-Co magnets Property Neodymium Sm-Co Remanence (T) 1–1.3 0.82–1.16 Coercivity (MA/m) 0.875–1.99 0.493–1.59 Permeability 1.05 1.05 Temperature coefficient of remanence (%/K) –0.12 –0.03 Temperature coefficient of coercivity (%/K) –0.55..–0.65 –0.15..–0.30 Curie temperature (°C) 320 800 Density (g/cm3) 7.3–7.5 8.2–8.4 CTE, magnetizing direction (1/K) 5.2×10–6 5.2×10–6 CTE, normal to magnetizing direction (1/K) –0.8×10–6 11×10–6 Flexural strength (N/mm2) 250 150 Compressive strength (N/mm2) 1100 800 Tensile strength (N/mm2) 75 35 Vickers hardness (HV) 550–650 500–550 Electrical resistivity (Ω·cm) (110–170)×10–6 86×10–6 PHYSICAL PROPERTIES OF SINTERED NdFeB Temp.Coeff.of Br -0.09~-0.11%/? Specific Heat 0.12Kcal/(kg,?) Density 7.4-7.6g/cm3 Young’s Modulus 1.6x1011N/m2 Vickers hardness 600Hv Poisson’s Ratio 0.24 Tensile Strength 8.0Kg/mm2 Curie Temperature 310~340? Temp.Coeff.of Hc -0.50~-0.60%/? Thermal Conductivity 7.7Kcal/(m.h.?) Electrical Resistivity 114μΩ.cm Rigidity 0.64N/m2 Flexural Strength 25Kg/mm Compressibility 9.8x10-12m2/N Coeff. Of Thermal Expansion 4x10-6/? Relative recoil permeabilityμrev 1.05 Introduction of reed switch magnets/alnico magnets: 1,Metal injection molding, made from the stainless steel, tungsten, Iron-base alloy, tool steel, hard metal alloy. 2,Rare earth magnet, including sintered Neodymium-Iron-Boron, bonded Neodymium-Iron-Boron, sintered Samarium-Cobalt. All magnets are supplied in a wide range of shapes such as: rectangular blocks, discs, rings and segments. 3,Ferrite magnet: Hard ferrite magnet and soft ferrite magnet including the MnZn and NiZn. 4,Die-cast component, made from zinc, aluminum, magnesium alloys. Picture of reed switch magnets/alnico magnets: Other quality management SPC dada statistics., Advanced inspection equipments, Staff education, APQP FMEA , PPAP , SPC , MSA , 6 sigma , MIL-STD M105E Standard Ac=0 Sampling Method ( Zero Defect Plan ) , Traceable lot number naming method . ♣ Please do not hesitate to contact us with the following infomation if you have intention of purchasing,thanks 1.Drawings or samples (offering both will be preferred). 2.Purchasing quantity. 3.Materials and other requirements. Certification: reed switch magnets/alnico magnets