Machinable soft magnetic composite

Ferrotron 559H

Highest dielectric strength, lowest losses at high frequencies

Ferrotron 559H provides proven flux concentrator performance with the highest dielectric strength in the Fluxtrol family of machinable soft magnetic materials and lowest losses at high frequencies. Almost constant magnetic permeability over a range of magnetic flux densities and frequencies. Material has good mechanical strength and thermal conductivity. Regarded by many to have the best machinability of the Fluxtrol family of materials.

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 Ferrotron 559H, contact us or request pricing and we will be in touch shortly.

Ferrotron 559H on common coil styles

Typical induction coil configurations where Ferrotron 559H is applied as a magnetic flux controller.

2 Turn O.D. coil with Ferrotron 559H
2 Turn O.D.
Hair Pin coil with Ferrotron 559H
Hair Pin
I.D. Multi Turn coil with Ferrotron 559H
I.D. Multi Turn
Pancake coil with Ferrotron 559H
Pancake
I.D. Single Turn coil with Ferrotron 559H
I.D. Single Turn
Split and Return coil with Ferrotron 559H
Split and Return
Transverse Flux coil with Ferrotron 559H
Transverse Flux

Ferrotron 559H properties

PropertyUnitsFerrotron 559H
µr initialperpNone16
µr maximumperpNone18
µr initialparNone11
µr maximumparNone13
BsT1.2
Dielectric StrengthkV/m140
κperpW/m-K5.5
κparW/m-K3.0
CTEperp1/K1.5 X 10-5
CTEpar1/K1.5 X 10-5
CpJ/g-°C0.51
Densityg/cm35.9
HardnessD scale89
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.

Ferrotron 559H graphs

Ferrotron 559H B-H Curve

Ferrotron 559H B-H Curve

View data table
H (A/m)BperpBpar
2000.0040.003
5000.010.007
10000.0210.015
20000.0440.031
30000.0670.048
40000.090.063
50000.1130.079
60000.1370.096
80000.1830.129
100000.2290.163
120000.2730.196
150000.3350.246
200000.4370.327
250000.530.406
300000.6130.482
350000.6900.556
400000.7590.625
500000.8790.751

Ferrotron 559H µᵣ vs H

View data table
H (A/m)µrperpµrpar
2001611
5001712
10001712
20001812
30001813
40001813
50001813
60001813
80001813
100001813
120001813
150001813
200001713
250001713
300001613
350001613
400001512
500001412

Ferrotron 559H 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
Ferrotron 559H ConstantsValue
a1.62
b1.6
c0.0005

Ferrotron 559H 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
Ferrotron 559H ConstantsValue
a1.62
b1.6
c0.0005

Ferrotron 559H 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
0.000513.60.000507.2
0.0010113.10.0010018.9
0.0020130.00.0020037.1
0.0030039.10.0029947.4
0.0039943.30.0040050.3
0.0049944.80.0045948.2
0.0060044.00.0050041.8
0.0060044.00.0059924.1
0.0070037.80.0070017.1
0.0080028.10.0080013.1
0.0090021.10.0090010.2

Ferrotron 559H stock sizes

Rounds / billets

Size in InchesSize in Millimeters
0.50 Ø X 2.003.50 Ø X 2.0012.7 Ø X 50.889.0 Ø X 50.8
0.50 Ø X 2.503.50 Ø X 2.5012.7 Ø X 63.589.0 Ø X 63.5
0.67 Ø X 2.004.00 Ø X 0.7517.0 Ø X 50.8101.5 Ø X 19.0
0.75 Ø X 2.004.00 Ø X 1.0019.0 Ø X 50.8101.5 Ø X 25.4
1.00 Ø X 2.004.00 Ø X 2.0025.4 Ø X 50.8101.5 Ø X 50.8
1.00 Ø X 3.004.50 Ø X 1.0025.4 Ø X 76.2114.3 Ø X 25.4
1.25 Ø X 2.004.50 Ø X 2.0031.7 Ø X 50.8114.3 Ø X 50.8
1.25 Ø X 3.005.00 Ø X 0.2531.7 Ø X 76.2127.0 Ø X 6.3
1.50 Ø X 2.005.00 Ø X 0.7538.1 Ø X 50.8127.0 Ø X 19.0
1.50 Ø X 3.005.00 Ø X 1.0038.1 Ø X 76.2127.0 Ø X 25.4
1.75 Ø X 2.005.00 Ø X 2.0044.5 Ø X 50.8127.0 Ø X 50.8
1.75 Ø X 3.005.50 Ø X 1.0044.5 Ø X 76.2140.0 Ø X 25.4
2.00 Ø X 2.005.50 Ø X 1.2550.8 Ø X 50.8140.0 Ø X 31.7
2.00 Ø X 3.005.50 Ø X 2.0050.8 Ø X 76.2140.0 Ø X 50.8
2.30 Ø X 2.006.00 Ø X 0.2558.4 Ø X 50.8152.4 Ø X 6.3
2.30 Ø X 2.506.00 Ø X 0.7558.4 Ø X 63.5152.4 Ø X 19.0
2.30 Ø X 3.006.00 Ø X 1.0058.4 Ø X 76.2152.4 Ø X 25.4
2.30 Ø X 5.126.00 Ø X 2.0058.4 Ø X 130.0152.4 Ø X 50.8
2.50 Ø X 2.006.50 Ø X 0.7563.5 Ø X 50.8165.1 Ø X 19.0
2.50 Ø X 2.506.50 Ø X 1.0063.5 Ø X 63.5165.1 Ø X 25.4
2.50 Ø X 3.006.50 Ø X 1.2563.5 Ø X 76.2165.1 Ø X 31.7
2.76 Ø X 2.006.50 Ø X 1.5070.1 Ø X 50.8165.1 Ø X 38.1
2.76 Ø X 2.506.50 Ø X 2.0070.1 Ø X 63.5165.1 Ø X 50.8
2.76 Ø X 3.008.00 Ø X 0.7570.1 Ø X 76.2203.2 Ø X 19.0
3.00 Ø X 1.008.00 Ø X 1.0076.2 Ø X 25.4203.2 Ø X 25.4
3.00 Ø X 2.008.00 Ø X 1.5076.2 Ø X 50.8203.2 Ø X 38.1
3.00 Ø X 2.508.00 Ø X 1.7576.2 Ø X 63.5203.2 Ø X 44.5
3.00 Ø X 3.008.00 Ø X 2.0076.2 Ø X 76.2203.2 Ø X 50.8
3.50 Ø X 1.0089.0 Ø X 25.4

Rectangular blocks

Size in InchesSize in Millimeters
0.25 x 1.00 x 4.006.3 x 25.4 x 101.51.25 x 1.25 x 4.0031.7 x 31.7 x 101.5
0.25 x 1.50 x 4.006.3 x 38.1 x 101.51.50 x 2.00 x 4.0038.1 x 50.8 x 101.5
0.50 x 0.50 x 4.0012.7 x 12.7 x 101.52.00 x 2.00 x 2.0050.8 x 50.8 x 50.8
0.50 x 0.75 x 4.0012.7 x 19.0 x 101.50.25 x 3.12 x 8.756.3 x 79.2 x 222.2
0.50 x 1.00 x 4.0012.7 x 25.4 x 101.50.25 x 4.25 x 6.506.3 x 107.9 x 165.0
0.50 x 1.50 x 4.0012.7 x 38.1 x 101.50.25 x 6.50 x 8.756.3 x 165.0 x 222.2
0.50 x 2.00 x 4.0012.7 x 50.8 x 101.50.38 x 3.12 x 8.759.6 x 79.2 x 222.2
0.63 x 0.63 x 4.0016.0 x 16.0 x 101.50.38 x 4.25 x 6.509.6 x 107.9 x 165.0
0.63 x 0.75 x 4.0016.0 x 19.0 x 101.50.38 x 6.50 x 8.759.6 x 165.0 x 222.2
0.63 x 1.00 x 4.0016.0 x 25.4 x 101.50.50 x 3.12 x 8.7512.7 x 79.2 x 222.2
0.63 x 2.00 x 4.0016.0 x 50.8 x 101.50.50 x 4.25 x 6.5012.7 x 107.9 x 165.0
0.75 x 0.75 x 4.0019.0 x 19.0 x 101.50.50 x 6.50 x 8.7512.7 x 165.0 x 222.2
0.75 x 1.00 x 4.0019.0 x 25.4 x 101.50.63 x 3.12 x 8.75160 x 79.2 x 222.2
0.75 x 1.50 x 4.0019.0 x 38.l x 101.50.63 x 4.25 x 6.5016.0 x 107.9 x 165.0
0.75 x 2.00 x 4.0019.0 x 50.8 x 101.50.63 x 6.50 x 8.7516.0 x 165.0 x 222.2
1.00 x 1.00 x 2.0025.4 x 25.4 x 50.80.75 x 3.12 x 8.7519.0 x 79.2 x 222.2
1.00 x 1.00 x 3.0025.4 x 25.4 x 76.20.75 x 4.25 x 6.5019.0 x 107.9 x 165.0
1.00 x 1.25 x 4.0025.4 x 31.7 x 101.50.75 x 6.50 x 8.7519.0 x 165.0 x 222.2
1.00 x 1.50 x 3.0025.4 x 38.1 x 76.21.00 x 3.12 x 8.7525.4 x 79.2 x 222.2
1.00 x 1.50 x 4.0025.4 x 38.1 x 101.51.00 x 4.25 x 6.5025.4 x 107.9 x 165.0
1.00 x 2.00 x 4.0025.4 x 50.8 x 101.51.00 x 6.50 x 8.7525.4 x 165.0 x 222.2
1.25 x 1.25 x 3.0031.7 x 31.7 x 76.2

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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