China custom magnets,ndfeb magnets, smco magnets supplier

A variety of custom magnets can be tailored to meet global customers' requirements. When you request for quotation, please provide us a technical drawing with the following specifications as detailed as possible.

  1. Material type (sintered NdFeB magnets, bonded NdFeB magnets or sintered SmCo magnets) and grade/magnetic properties (please take the maximium working temperature Tw into consideration).
  2. Dimensions and tolerances.
  3. Need any coating? If yes, please confirm the coating type.
  4. Magnetization direction and/or number of magnetic poles.
  5. Order quantity.
  6. Other requirements if there are.

Please do not hesitate to call us, email us or leave us a message. We will respond to your inquiry within one business day.

>> Typical Physical and Chemical Properties of Some Magnetic Materials

   
Performance Name Unit Sintered NdFeB Bonded NdFeB Sintered Sm2Co17 Sintered SmCo5 Sintered Ferrite Injection Ferrite AlNiCo
Maximum Energy Product ((BH)max) MGOe 28 ~ 52 2 ~ 13 16 ~ 32 14 ~ 24 2 ~ 5 1 ~ 2 1 ~ 13
Intrinsic Coercivity (Hcj) kOe 11 ~ 35 6 ~ 14 8 ~ 35 15 ~ 30 2 ~ 5 2 ~ 4 1 ~ 2
Temperature Coefficient of Br (α) %/°C -0.09 ~ -0.12 -0.10 ~ -0.13 -0.030 ~ -0.045 -0.035 ~ -0.050 -0.2 -0.2 -0.02
Temperature Coefficient of Hcj (β) %/°C -0.40 ~ -0.60 -0.40 ~ -0.60 -0.20 ~ -0.30 -0.20 ~ -0.30 0.3 0.3 0.01 ~ 0.03
Curie Temperature (Tc) °C 310 ~370 300 ~ 350 800 ~ 850 700 ~ 750 450 ~ 480 450 ~ 480 750 ~ 890
Maximum Working Temperature (Tw) °C 230 150 350 250 250 150 500
Recoil Permeability (μrec) - 1.05 1.2 1.05 ~ 1.10 1.05 1.05 ~ 1.20 1.05 ~ 1.20 1.70 ~ 4.70
Density (ρ) g/cm3 7.4 ~7.7 4.0 ~ 6.5 8.3 ~ 8.5 8.1 ~ 8.4 4.8 ~ 5.2 3.3 ~ 3.9 6.9 ~ 7.4
Resistivity (ρ) μΩ·m 1.4 ~ 1.6 - 0.8 ~ 0.9 0.5 ~ 0.6 > 1×108 > 1×108 > 5×103
Thermal Conductivity (λ) W/(m·°C) 8 ~ 10 - 12 13 - - -
Vickers Hardness (Hv) MPa 500 ~ 600 - 500 ~ 600 400 ~ 500 480 ~ 580 - 520 ~ 630
Rockwell Hardness (HRB) MPa - 35 ~ 45 - - - - -
Compressive Strenght (σbc) MPa 1000 ~ 1100 200 800 1000 - - -
Bending Strength (σbb) MPa 200 ~ 400 - 150 180 300 90 ~ 160 -
Tensile Strength (σb) MPa 80 ~ 90 58 35 40 < 100 45 ~ 110 -
Young’s Modulus (E) GPa 150 ~ 200 - 120 130 - - -
Thermal Expansivity (α) 10-6/°C ∥3 ~ 4 1 ~ 2 ∥7 ~ 9 ∥5 ~ 7 7 ~ 15 - -
⊥1 ~ 3 ⊥10 ~ 12 ⊥11 ~ 13
Corrosion resistance ★★☆☆☆ ★★★☆☆ ★★★★☆ ★★★★☆ ★★★★☆ ★★★★☆ ★★★★★
Note:
∗ The above data are only for reference, specific magnets maybe have different values.