D1/4"X1/4" SmCo Samarium Cobalt Magnet

Samarium Cobatl magnets: good thermal stability, resistant to corrosion, resistant to demagnetization A samarium-cobalt

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Basic Info
Model NO. Sm2Co17
Product Name of SmCo Magnet D1/4"X1/4" SmCo Samarium Cobalt Magnet
Envrionment Management System ISO9001/14001
Certificate of SmCo Magnet CE/RoHS/SGS
Tolerance of SmCo Magnet +/- 0.05mm
Magnetization Direction of SmCo Magnet Axial/Radial/Multi-Poles Magnetization
Working Temp. of SmCo Magnet Max 840 C
Transportation of SmCo Magnet by Sea, by Air, by Express
Lead Time of SmCo Magnet 7-20days
Packing of SmCo Magnet Anti-Magnetizing Iron Box & Carton
Payment T/T, Paypal, Western Union
Transport Package Carton, Anti-Magnetizing Packing, Pallet
Specification D1/4"x1/4"
Trademark GME SmCo Magnet
Origin Xiamen
HS Code 850511100
Production Capacity 3000 Tons
Product Description



Disc / Round / Disk/ Arc......


Samarium Cobalt

Pull force

3.97 pounds


Axial/Radial/Multi-Poles Magnetization


5000 pcs

Leading Time

25-35 working days




ISO2000, TS16949, RoHS, CE, SGS & REACH


T/T, PayPal, Western Union
Samarium Cobatl magnets: good thermal stability, resistant to corrosion, resistant to demagnetization
A samarium-cobalt (SmCo) magnet, a type of rare earth magnet, is a strong permanent magnet made of an alloy of samarium and cobalt.
They are generally ranked similarly in strength to neodymium magnets, but have higher temperature ratings and higher coercivity.
samarium-cobalt (SmCo) magnets are brittle, and prone to cracking and chipping. Samarium-cobalt magnets have maximum energy products (BHmax) that range from 16 megagauss-oersteds (MGOe) to 33 MGOe, approx. 128 kJ/m3 to 264 kJ/m3; their theoretical limit is 34 MGOe, about 272 kJ/m3.
samarium-cobalt (SmCo) magnets are available in two "series", namely Series 1:5 and Series 2:17.
Sintered Samarium Cobalt magnets exhibit magnetic anisotropy, meaning they can only be magnetized in the axis of their magnetic orientation. This is done by aligning the crystal structure of the material during the manufacturing process.

Machining & Magnetization
Samarium Cobalt magnets offer strong resistance to demagnetization. All Samarium Cobalt magnets cannot be formed with conventional drilling, turning or milling processes, and must be ground before they are magnetized. Additionally, large or complex assemblies are usually magnetized prior to assembly. Standard tolerances for Samarium Cobalt magnets are +/-.005 for ground dimensions.
1:5 alloy material
1:5 offers 16 MGOe (energy product) to 22 MGOe and is made up of approximately 50% samarium and 50% cobalt. The 1:5 series has a maximum recommended operating temperature of 250°C. SmCo 1:5 magnets require lower field strengths than 2:17 materials to magnetize. In some instances, 1:5 material may be magnetized with multiple poles, provided that a magnetizing fixture is available.
2:17 alloy material
2:17 offers 24 MGOe to 32 MGOe and is composed of about 25% samarium, 5% copper, 18% iron, 2% hafnium or zirconium, with the remainder being cobalt. The 2:17 series has a maximum operating temperature of 350°C. Special grades of 2:17 are available which can operate to even higher temperatures. SmCo 2:17 requires a higher magnetizing field than alloy 1:5 does, and multiple pole magnetization is sometimes possible, provided that a magnetizing fixture is available.
Performance for samarium cobalt magnets:
MaterialGradeRemannenceCoercive ForceInstrinsic CoerciveMax EnergyDensityTemp
Cuire TempMax Working Temp.
(Br)(Hcj)(Hcb)(BHmax)(D)(Near Br)(Near Hcj)(TC)
SmCo 1:5
LTc(HM-10)59063049362001430183080108.2Temp Range%ºC700250
1:5 20-100ºC-0.004
(SmGd)CO5 100-200ºC-0.021

2:17 Sm2SmCo26M1030103007169000159220000207268.3-0.03-0.2800300
LTc(HMG-22)98098007159000150020000230238.3Temp Range%ºC840300
2:17 -50-25ºC0.005
(SmEr)2(CoTM)17 20-100ºC0.012
Features include:
Samarium cobalt magnets are hard and brittle and may chip or break if dropped.
They have high magnetic properties
Samarium cobalt magnets offer good thermal stability
Samarium cobalt magnets are resistant to corrosion
Samarium cobalt magnets resistant to demagnetization
Extremely resistant to demagnetization
high temperature stability (max operating temperatures between 250 °C (523 K) and 550 °C (823 K); Curie temperatures from 700 °C (973 K) to 800 °C (1,070 K)
Expensive and subject to price fluctuations (cobalt is market price sensitive)
Samarium cobalt magnets can easily chip; eye protection must be worn when handling them.
Allowing magnets to snap together can cause the magnets to shatter, which can cause a potential hazard.
Samarium-cobalt is manufactured by a process called sintering, and as with all sintered materials, inherent cracks are very possible. These magnets do not have mechanical integrity; instead the magnet must be utilized for its magnetic functions and other mechanical systems must be designed to provide the mechanical reliability of the system.
Comparison between neodymium and samarium cobalt
Remanence (T)1-1.30.82-1.16
Coercivity (MA/m)0.875-1.990.493-1.59
Relative permeability1.051.05
Temperature coefficient of remanence (%/K)0.120.03
Temperature coefficient of coercivity (%/K)0.55..-0.650.15..-0.30
Curie temperature (°C)320800
Density (g/cm3)7.3-7.58.2-8.4
CTE, magnetizing direction (1/K)5.2×1065.2×106
CTE, normal to magnetizing direction (1/K)0.8×10611×106
Flexural strength (N/mm2)250150
Compressive strength (N/mm2)1100800
Tensile strength (N/mm2)7535
Vickers hardness (HV)550-650500-650
Electrical resistivity (Ω·cm)(110-170)×10686×106

D1/4"X1/4" SmCo Samarium Cobalt Magnet

D1/4"X1/4" SmCo Samarium Cobalt Magnet

D1/4"X1/4" SmCo Samarium Cobalt Magnet