Custom NdFeB magnets, custom SmCo magnets, custom rare earth magnets

Custom Rare Earth Magnets

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

  1. Magnetic material type (sintered NdFeB magnets, bonded NdFeB magnets or sintered SmCo magnets) and magnet grade/magnetic properties (please take the maximum working temperature Tw into consideration).
  2. Dimensions and tolerances.
  3. Need any coating? If yes, please confirm the magnet 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 NameUnitSintered NdFeBBonded NdFeBSintered Sm2Co17Sintered SmCo5Sintered FerriteInjection FerriteAlNiCo
Maximum Energy Product ((BH)max)MGOe28 ~ 522 ~ 1316 ~ 3214 ~ 242 ~ 51 ~ 21 ~ 13
Intrinsic Coercivity (Hcj)kOe11 ~ 356 ~ 148 ~ 3515 ~ 302 ~ 52 ~ 41 ~ 2
Temperature Coefficient of Br (α)%/°C-0.09 ~ -0.12-0.10 ~ -0.12-0.030 ~ -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 ~ -0.300.30.30.01 ~ 0.03
Curie Temperature (Tc)°C310 ~370300 ~ 350800 ~ 850700 ~ 750450 ~ 480450 ~ 480750 ~ 890
Maximum Working Temperature (Tw)°C230150350250250150500
Recoil Permeability (μrec)-1.051.21.05 ~ 1.101.051.05 ~ 1.201.05 ~ 1.201.70 ~ 4.70
Density (ρ)g/cm37.4 ~ 7.74.5 ~ 6.58.3 ~ 8.58.1 ~ 8.44.8 ~ 5.23.3 ~ 3.96.9 ~ 7.4
Resistivity (ρ)μΩ·m1.4 ~ 1.6-0.8 ~ 0.90.5 ~ 0.6> 1×108> 1×108> 5×103
Thermal Conductivity (λ)W/(m·°C)8 ~ 10-1213---
Vickers Hardness (Hv)MPa500 ~ 600-500 ~ 600400 ~ 500480 ~ 580-520 ~ 630
Rockwell Hardness (HRB)MPa-35 ~ 45-----
Compressive Strenght (σbc)MPa1000 ~ 11002008001000---
Bending Strength (σbb)MPa200 ~ 400-15018030090 ~ 160-
Tensile Strength (σb)MPa80 ~ 90583540< 10045 ~ 110-
Young’s Modulus (E)GPa150 ~ 200-120130---
Thermal Expansivity (α)10-6/°C∥3 ~ 41 ~ 2∥7 ~ 9∥5 ~ 77 ~ 15--
⊥1 ~ 3⊥10 ~ 12⊥11 ~ 13
Corrosion resistance★★☆☆☆★★★☆☆★★★★☆★★★★☆★★★★☆★★★★☆★★★★★
Note:
∗ The above data are only for reference, specific magnets maybe have different values.