Machinable soft magnetic composite

Fluxtrol 25

Best elasticity of the family, excellent machinability

Fluxtrol 25 provides good performance over a wide range of frequencies. The material has the best elasticity of Fluxtrol materials, excellent machinability and reasonable thermal conductivity.

Note: There are many variables involved in an induction process. In order to utilize the fullest potential of our product, you must help narrow down the parameters you are operating with. Each grade of Fluxtrol material has its own distinctive properties that are beneficial to a certain range of electrical and design parameters.

Contact Fluxtrol Inc. to receive more information about which material is right for you.

To buy Fluxtrol 25, contact us or request pricing and we will be in touch shortly.

Fluxtrol 25 on common coil styles

Typical induction coil configurations where Fluxtrol 25 is applied as a magnetic flux controller.

2 Turn O.D. coil with Fluxtrol 25
2 Turn O.D.
Hair Pin coil with Fluxtrol 25
Hair Pin
I.D. Multi Turn coil with Fluxtrol 25
I.D. Multi Turn
Pancake coil with Fluxtrol 25
Pancake
I.D. Single Turn coil with Fluxtrol 25
I.D. Single Turn
Split and Return coil with Fluxtrol 25
Split and Return
Transverse Flux coil with Fluxtrol 25
Transverse Flux

Fluxtrol 25 properties

PropertyUnitsFluxtrol 25
µr initialperpNone22
µr maximumperpNone28
µr initialparNone11
µr maximumparNone12
BsT1.1
Dielectric StrengthkV/m25
κperpW/m-K5.0
κparW/m-K2.2
CTEperp1/K1.6 X 10-5
CTEpar1/K1.6 X 10-5
CpJ/g-°C0.54
Densityg/cm35.5
HardnessD scale85
Flexural StrengthperpMPA30.9
Flexural StrengthparMPA27.4
ModulusperpTangent 0.07% – MPA7,470
ModulusparTangent 0.07% – MPA9,890

perp = perpendicular and par = parallel to the pressing direction. Values are typical.

Fluxtrol 25 graphs

Fluxtrol 25 B-H Curve

Fluxtrol 25 B-H Curve

View data table
H (A/m)BperpBpar
2000.005
5000.0150.007
10000.0310.014
20000.0660.029
30000.1020.046
40000.1380.06
50000.1720.075
60000.2080.092
80000.2720.123
100000.3320.156
120000.3830.187
150000.4520.233
200000.5520.306
250000.630.373
300000.6980.434
350000.7540.492
400000.8050.543
500000.890.634

Fluxtrol 25 µᵣ vs H

View data table
H (A/m)µrperpµrpar
20022
5002411
10002511
20002612
30002712
40002712
50002812
60002712
80002712
100002612
120002512
150002412
200002212
250002012
300001812
350001711
400001611
500001410

Fluxtrol 25 Losses vs Flux Density

View data table
Pv = aB2(1-B/b)f + cB2f2
SymbolDescription
PvPower Density (W/cm3)
BMagnetic Flux Density (T)
fFrequency (kHz)
a, b, cConstants
Fluxtrol 25 ConstantsValue
a1.75
b1.4
c0.0025

Fluxtrol 25 Losses vs Frequency

View data table
Pv = aB2(1-B/b)f + cB2f2
SymbolDescription
PvPower Density (W/cm3)
BMagnetic Flux Density (T)
fFrequency (kHz)
a, b, cConstants
Fluxtrol 25 ConstantsValue
a1.75
b1.4
c0.0025

Fluxtrol 25 Stress-Strain Curve

View data table
Flexure Strainperp (mm/mm)Flexure Stressperp (MPA)Flexure Strainpar (mm/mm)Flexure Stresspar (MPA)
0.000000.00.000000.0
0.0020012.80.001009.1
0.0039922.10.0020016.7
0.0060026.20.0029922.0
0.0079928.20.0039925.0
0.0119930.10.0049926.5
0.0159930.90.0064927.4
0.0180030.80.0080026.4
0.0199930.00.0100021.8
0.0220027.70.0120016.7
0.0260021.00.0139912.4
0.0300013.20.016009.3

Fluxtrol 25 stock sizes

Rounds / billets

Size in InchesSize in Millimeters
0.370 Ø X 2.003.500 Ø X 2.509.4 Ø x 50.889.0 Ø x 63.5
0.500 Ø X 2.004.000 Ø X 0.7512.7 Ø x 50.8101.5 Ø x 19.0
0.670 Ø X 2.004.000 Ø X 1.0017.0 Ø x 50.8101.5 Ø x 25.4
0.750 Ø X 2.004.000 Ø X 2.0019.0 Ø x 50.8101.5 Ø x 50.8
1.000 Ø X 2.004.500 Ø X 1.0025.4 Ø x 50.8114.3 Ø x 25.4
1.000 Ø X 3.004.500 Ø X 2.0025.4 Ø x 76.2114.3 Ø x 50.8
1.250 Ø X 2.005.000 Ø X 0.2531.7 Ø x 50.8127.0 Ø x 6.3
1.250 Ø X 3.005.000 Ø X 0.7531.7 Ø x 76.2127.0 Ø x 19.0
1.500 Ø X 2.005.000 Ø X 1.0038.1 Ø x 50.8127.0 Ø x 25.4
1.500 Ø X 3.005.000 Ø X 2.0038.1 Ø x 76.2127.0 Ø x 50.8
1.750 Ø X 2.005.500 Ø X 1.0044.5 Ø x 50.8140.0 Ø x 25.4
1.750 Ø X 3.005.500 Ø X 1.2544.5 Ø x 76.2140.0 Ø x 31.7
2.000 Ø X 2.005.500 Ø X 2.0050.8 Ø x 50.8140.0 Ø x 50.8
2.000 Ø X 3.006.000 Ø X 0.2550.8 Ø x 76.2152.4 Ø x 6.3
2.300 Ø X 2.006.000 Ø X 0.7558.4 Ø x 50.8152.4 Ø x 19.0
2.300 Ø X 3.006.000 Ø X 1.0058.4 Ø x 76.2152.4 Ø x 25.4
2.300 Ø X 5.126.000 Ø X 2.0058.4 Ø x 130152.4 Ø x 50.8
2.500 Ø X 2.006.500 Ø X 0.2563.5 Ø x 50.8165.1 Ø x 6.3
2.500 Ø X 2.506.500 Ø X 0.7563.5 Ø x 63.5165.1 Ø x 19.0
2.500 Ø X 3.006.500 Ø X 1.0063.5 Ø x 76.2165.1 Ø x 25.4
2.760 Ø X 2.006.500 Ø X 1.2570.1 Ø x 50.8165.1 Ø x 31.7
2.760 Ø X 2.506.500 Ø X 1.5070.1 Ø x 63.5165.1 Ø x 38.1
2.760 Ø X 3.006.500 Ø X 1.7570.1 Ø x 76.2165.1 Ø x 44.5
3.000 Ø X 1.006.500 Ø X 2.0076.2 Ø x 25.4165.1 Ø x 50.8
3.000 Ø X 2.008.000 Ø X 0.7576.2 Ø x 50.8203.2 Ø x 19.0
3.000 Ø X 2.508.000 Ø X 1.0076.2 Ø x 63.5203.2 Ø x 25.4
3.000 Ø X 3.008.000 Ø X 1.2576.2 Ø x 76.2203.2 Ø x 31.7
3.500 Ø X 1.008.000 Ø X 1.5089.0 Ø x 25.4203.2 Ø x 38.1
3.500 Ø X 2.008.000 Ø X 2.0089.0 Ø x 50.8203.2 Ø x 50.8

Rectangular blocks

Size in InchesSize in Millimeters
0.25 X 1.00 X 4.006.3 x 25.4 x 101.51.00 X 1.50 X 3.0025.4 x 38.1 x 76.2
0.25 X 1.50 X 4.006.3 x 38.1 x 101.51.00 X 1.50 X 4.0025.4 x 38.1 x 101.5
0.50 X 0.50 X 4.0012.7 x 12.7 x 101.51.00 X 2.00 X 4.0025.4 x 50.8 x 101.5
0.50 X 0.75 X 4.0012.7 x 19 x 101.50.25 X 6.50 X 8.756.3 x 165 x 222.2
0.50 X 1.00 X 4.0012.7 x 25.4 x 101.50.38 X 3.12 X 8.756.3 x 79.2 x 222.2
0.50 X 1.50 X 4.0012.7 x 38.1 x 101.50.38 X 4.25 X 6.509.6 x 107.9 x 165
0.50 X 2.00 X 4.0012.7 x 50.8 x 101.50.38 X 6.50 X 8.759.6 x 165 x 222.2
0.63 X 0.63 X 4.0016 x 16 x 101.50.50 X 3.12 X 8.7512.7 x 79.2 x 222.2
0.63 X 0.75 X 4.0016 x 19 x 101.50.50 X 4.25 X 6.5012.7 x 107.9 x 165
0.63 X 1.00 X 4.0016 x 25.4 x 101.50.50 X 6.50 X 8.7512.7 x 165 x 222.2
0.63 X 1.50 X 4.0016 x 38.1 x 101.50.63 X 3.12 X 8.7516 x 79.2 x 222.2
0.63 X 2.00 X 4.0016 x 50.8 x 101.50.63 X 4.25 X 6.5016 x 107.9 x 165
0.75 X 0.75 X 4.0019 x 19 x 101.50.63 X 6.50 X 8.7516 x 165 x 222.2
0.75 X 1.00 X 4.0019 x 25.4 x 101.50.75 X 3.12 X 8.7519 x 79.2 x 222.2
0.75 X 1.50 X 4.0019 x 38.1 x 101.50.75 X 4.25 X 6.5019 x 107.9 x 165
0.75 X 2.00 X 4.0019 x 50.8 x 101.50.75 X 6.50 X 8.7519 x 165 x 222.2
1.00 X 1.00 X 2.0025.4 x 25.4 x 50.81.00 X 3.12 X 8.7525.4 x 79.2 x 222.2
1.00 X 1.00 X 3.0025.4 x 25.4 x 76.21.00 X 4.25 X 6.5025.4 x 107.9 x 165
1.00 X 1.25 X 4.0025.4 x 31.7 x 101.51.00 X 6.50 X 8.7525.4 x 165 x 222.2

Other sizes and near-net shapes available on request: request pricing or contact us.

Compare Fluxtrol SMC grades

GradeTypeStandout properties
Fluxtrol AMachinableHighest maximum permeability and lowest magnetic losses at low to intermediate frequencies (favorable direction); good strength and thermal conductivity; readily machinable. High magnetic and thermal anisotropy.
Fluxtrol 100MachinableHighest thermal conductivity, saturation flux density and flexural strength of the family; magnetic properties similar to Fluxtrol A with much less anisotropy; good machinability with sharp tools and high spindle speeds.
Fluxtrol 50MachinableExcellent performance over a wide range of frequencies; good mechanical strength, machinability and thermal conductivity.
Fluxtrol 25MachinableGood performance over a wide range of frequencies; best elasticity of the family; excellent machinability; reasonable thermal conductivity.
Ferrotron 559HMachinableHighest dielectric strength and lowest losses at high frequencies; nearly constant permeability across flux densities and frequencies; regarded by many as the most machinable grade.
Ferrotron 559H OriginalMachinableSimilar to Ferrotron 559H with nearly constant permeability over a wide range of flux densities and excellent machinability.
Alpha-form MF / LFFormableMagnetic particles in a thermal-curing epoxy binder; molded onto the coil and oven-cured for quick, efficient installation on coils with low tolerances.
Fluxtrol LRMLaminate replacementDirect replacement for laminations; near-net shapes, lower coil-copper temperatures and shorter build time than lamination stacks.

Properties are qualitative. Grade selection depends on frequency, coil geometry, cooling and process: ask an engineer.

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