FeCrCoMagnet are primarily of the Iron-Chromium-Cobalt composition. Some grades may also contain additions of
vanadium, silicon, titanium, zirconium, manganese, molybdenum or aluminum. We call them “machinable Alnico”, because they have very similar performance with Alnico Magnet,but they can be machined easily prior to heat treatment.
<ul class="check">
<li>FeCrCo also have good performance on temperature, their max operating temp. can reach 450°C. </li>
<li>Very machinable, all the magnets are very brittle expecially those rare earth magnets. FeCrCo is the only permanent magnetic material that can be machined by lots of method like drilling, press and all of the method can be used on any alloys Piror to their heat treatment(a process for making their magnetic properties.</li>
<li>FeCrCo is a material similar to Alnico that orient their magnetic direction( just for anisotropic) in heat treatment process. And also a material can form to shapes directly (rare earth magnets are usually cut from a standard magnet blocks,because they are orient during pressing process.)</li>
<li>FeCrCo can be made to a kind of special magnetic properties that have very low Hc but pretty Br, that have special usages.</li>
</ul>
Typical Magnetic Properties
Grade | Residual induction(Br) | Coercive Force(Hcb) | (BH)max | Mark |
---|---|---|---|---|
Br:Residual induction /Hcb:Coersive Force /Hcj:intrinsic Coersive Force /(BH)max:Max Energy Product | ||||
kGs(mT) | kA/m(kOe) | kJ/M3(MGOe) | ||
Fe Cr Co 1 | 8.8(880) | 37(0.46) | 12.7(1.60) | Isotropic |
Fe Cr Co 2 | 9.9(990) | 28(0.35) | 12.7(1.60) | Isotropic |
Fe Cr Co | 10.5(1050) | 16(200) | 8.0(1.00) | Isotropic |
Fe Cr Co 1 | 9.0(900) | 39(490) | 13.0(1.63) | Isotropic |
Fe Cr Co 5 | 13.5(1350) | 48(600) | 41.8(5.25) | anisotropic |
Fe Cr Co 250 | 14.0(1400) | 20(250) | 15.9(2.00) | anisotropic |
Fe Cr Co 640 | 12.0(1200) | 51(641) | 35.0(4.4) | anisotropic |
Grade | Residual induction(Br) | Coercive Force(Hcb) | Coercive Force(Hcj) | (BH)max | Mark |
---|---|---|---|---|---|
Br:Residual induction /Hcb:Coersive Force /Hcj:intrinsic Coersive Force /(BH)max:Max Energy Product | |||||
kGs(mT) | kA/m(kOe) | kA/m(kOe) | kJ/M3(MGOe) | ||
FeCrCo10/3 | 820(8.2) | 340(27) | 360(29) | 10(1.25) | Isotropic |
FeCrCo12/4 | 800(8.0) | 500(40) | 530(42) | 12(1.5) | Isotropic |
FeCrCo28/5 | 1000(10) | 570(45) | 580(46) | 28(3.5) | anisotropic |
FeCrCo30/4 | 1150(11.5) | 500(40) | 510(41) | 30(3.8) | anisotropic |
FeCrCo35/5 | 1050(10.5) | 630(50) | 640(51) | 35(4.4) | anisotropic |
FeCrCo36/5 | 1200(12.0) | 660(52) | 680(54) | 36(4.5) | anisotropic |
FeCrCo44/4 | 1300(13.0) | 560(44) | 570(45) | 44(5.5) | anisotropic |
FeCrCo52/5 | 1350(13.5) | 600(48) | 620(49) | 52(6.5) | anisotropic |
MMPA Class | Reversible Temperature Coefficient Br % Change per ºC (–50 to +200ºC) | Curie Temperature ºC | Max Service Temperature ºC |
---|---|---|---|
The listed values are approximate and should be used as a reference. Any magnetic or physical characteristics should be substantiated before selecting a magnet material. | |||
FeCrCo 2 | 0.036 | 640 | 500 |
FeCrCo 5 | 0.020 | 640 | 500 |
FeCrCo 250 | 0.030 | 640 | 500 |
Electrical Resistivity Ohm-cm x10-6 (at 20ºC) | Thermal Conductivity W/(m • K) | Coefficient Of Thermal Expansion 10-6/ºC |
---|---|---|
The listed values are approximate and should be used as a reference. Any magnetic or physical characteristics should be substantiated before selecting a magnet material. | ||
70 | 21 | 10 |