National key high-tech enterprise specialized in R&D, production and sales of high performance permanent magnetic materials
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SmCo Magnets

SmCo (Samarium-Cobalt) magnets have obviously more excellent thermal properties as described later compared with NdFeB magnets and also good corrosion resistivity which remove the need for surface treatment. Reversible thermal demagnetizing rate of SmCo magnets is1/4 to 1/3 of that of NdFeB magnets. Some grades of SmCo magnets can be used at over 250℃, SmCo magnets are widely used in automotive parts and in hostile environments like heat resistant motors and precision magnetic sensors.


Tianhe provides two types of SmCo magnets: 1-5 type and 2-17 type respectively with various grades. case of 2-17 type, we can individually regulate the cohesive force iHc for ability of magnetizer the customers use. As our characteristic, in addition to general grades, we can also produce magnets with especially low thermal coefficient of Br(-O.OO8%/deg:20 to 200℃)" LT series.

Caution

1.The magnetized products should be kept away from floppy disks, magnetic CARDS, 

magnetic tapes, credit CARDS, electronic devices and electronic instrument boards, 

pacemakers and other medical devices or similar objects.

2.Please pay full attention to avoid any finger injury when applying the magnetized product since it possesses strong magnetic force.

3.Please pay full attention to avoid any damages or chips during transport and handling

since NdFeB and SmCo magnet possesses weak impact resistance. 







         Parameters                      unit                      SmCo5                      Sm2Co17            
Densityg/cm3
8.1-8.58.3-8.5
Curie Temperature700-750800-850
Recoil Permeability
1.00-1.051.00-1.1
HardnessHv450-500500-600
Electrical Resistivity
Ω·cm5-6×10-5
8-9×10-5
Compressive StrengthMpa420-680700-830
Thermal ConductivityW/m·k
12
Coefficient of Thermal Expansion(C ⊥)10-6/℃1311
Coefficient of Thermal Expansion(C //)10-6/℃68
Saturation FieldkA/m>1600>3200




          Dimension Range(mm)                     Plan view size(mm)                     Parallelism(mm)                     Perpendicularity (mm)            
0.5≤L≤10±0.04±0.040.5 degree for adjacent sides
10≤L≤50±0.05±0.05
L>50±0.1±0.1





Dimension Range(mm)          Cylindricity(mm)            Tolerance(mm)             Parallelism(mm)            
1≤D≤5±0.03±0.03±0.04
5≤D≤25±0.05±0.05±0.05
25≤D≤50±0.05±0.05±0.05
D>50±0.05±0.1±0.1





           Dimension Range(mm)                      Cylindricity(mm)                       Tolerance(mm)                     Parallelism(mm)          
1≤d≤3±0.04±0.04±0.04
3≤d≤5±0.04±0.04±0.04
5≤d≤15±0.05±0.05±0.05
d>15±0.1±0.05±0.1





          Item            Dimension Range(mm)                      Tolerance (mm)            
ThicknessT≤10±0.05
10<T≤25±0.05
LengthL≤10±0.04
10< L≤25±0.05
25< L≤63±0.05
L>63±0.07
Chordal LengthW>63±0.07
W>63±0.07




 

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