Materials and Semi-finished Products
Forms of Supply
Ribbons
Thickness: 0,05 mm – 0,15 mm
Width: < 640 mm (smaller standard sizes are available)
Length as demanded
w/o or with adhesive layer
Foils
Thickness: 0,05 mm – 0,15 mm
Width: < 640 mm (smaller standard sizes are available)
Length as demanded
w/o or with adhesive layer
Sheets and cuts
Thickness: 0,35 mm – 3 mm
Length: < 3000 mm
Width: < 750 mm
Sheets may be purchased complete or cut according to your requirements.
Properties of material
The nickel-iron alloy MUMETALL® is particularly well suited for applications requiring medium magnetic saturation induction, low magnetic coercive field strength and high permeability. Its high nickel content makes the mechanical working of MUMETALL® not unproblematic. Its magnetic properties however make the material one of the most common shielding materials. The high nickel content in most cases makes a surface corrosion protection unnecessary.
Among the most common applications of MUMETALL® are shielding for medium field strengths, multi-layer shielding, actuators and lamination stacks. MUMETALL® can be obtained through SEKELS GmbH as sheets, strip stock, final magnetically annealed foil, or rods, but also in form of finished parts.
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Forms of Supply
Properties of material
Amorphous Co-alloys (VITROVAC®) feature a unique combination of mechanical strength and hardness with soft magnetic properties. Furthermore due to the low magnetostriction of the alloys, the magnetic properties are almost insensitive against elastic deformations like e. g. small bending radii.
Due to the required rapid solidification production method, amorphous tapes are only available in a thickness of about 20 µm. They are ideal for effective magnetic shielding against weak magnetic fields, e. g. cable shielding.
Further information
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Forms of Supply
Rods, Bars
Diameter: ca. ca. 12,5 mm – 215 mm
Length: < 4000 mm (smaller standard sizes are available)
Properties of material
50 % CoFe-alloys (VACOFLUX® and VACODUR®) are the first choice for applications with demands concerning high magnetic flux densities (e.g. in flux concentrators, flux conductors). They are in particular suited for magnetic shieldings against strong fields, for magnetic yokes (for example in particle accelerators) and for motors and generators, where a maximum torque at a small volume is necessary. CoFe-alloys are brittle by nature and tend to “crumble” slightly if milled/turned. The correct thermal annealing is very important for the family of CoFe alloys. If not done properly the magnetic parameters will be significantly worse than the typical alloy data. VACOFLUX® is a versatile alloy with a broad spectrum of use, while VACODUR® allows to apply different thermal treatments, one optimizing the mechanical properties (with still superior magnetic properties) while the other generates optimal magnetic properties. This makes this alloy very useful for motor applications: The mechanically burdened rotor usually receives the mechanical annealing and stator the magnetic annealing treatment. Nevertheless both lamination types can be stamped or lasercut from one sheet of material, minimizing material losses!
Weitere Informationen
Soft Magnetic Cobalt-Iron Alloys PDF, Vacuumschmelze
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Forms of Supply
Sheets, Cuts
Thickness: 0,35 mm – 3 mm
Length: < 3000 mm
Width: < 750 mm
Sheets may be purchased complete or cut according to your requirements.
Properties of material
Compared to MUMETALL®, PERMENORM® 5000 H2 with its higher iron content has a higher saturation magnetisation and is therefore suitable primarily for applications in which stronger magnetic fields play a role. PERMENORM® 5000 H2 too does not usually need surface treatment to protect against corrosion.
The higher iron content also has disadvantages, however. Its dynamic properties (at higher magnetic field frequencies) are not as good as with MUMETALL®, and coercive field strength and therefore core losses are greater.
Apart from actuators and yokes, PERMENORM® 5000 H2 is often used in the area of magnetic shielding for medium and higher field strengths.
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Forms of Supply
Properties of material
With a similar composition to MUMETALL®, but treated with a special initial annealing process, CRYOPERM® 10 is an optimised shielding material for temperatures in the range of liquid nitrogen (approx. 77 K) or liquid helium (approx. 4,2 K). The magnetic properties of CRYOPERM® 10 at low temperatures are comparable to those of MUMETALL® at room temperature. This makes CRYOPERM® 10 the appropriate material for creating magnetic shielding for superconductors (especially SQUID sensors).
Further information
Brochure "CRYOPERM® 10" Vacuumschmelze
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Forms of Supply
Ribbons
Thickness: 0,5 – 2,0 mm
Width: ca. 270 – 280 mm
Length: as demanded
with adhesive layer only
Foils
Thickness: 0,5 – 2,0 mm
Width: ca. 270 – 280 mm
Length: as demanded
with adhesive layer only
Properties of material
SiFe-alloys are the classical 50/60 Hz transformer material. Their main advantage is a high saturation flux density in combination with a fairly high electrical resistivity (due to the adding of Si). Especially the gigh-grade alloy TRAFOPERM® is suitable for lamination core packages in standard and special applications.
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Forms of Supply
Properties of material
For applications that presuppose high saturation magnetisation but require defined magnetic properties, using a conventional iron substance or steel is not recommendable. Only painstaking processing and annealing can achieve reliable and reproducible magnetic material properties with pure iron.
Soft iron is employed principally in the area of magnetic systems, e. g. in pole shoes, yokes, as a magnetic anchoring mass and in the form of flux conductor plates. Soft iron shielding also makes it possible to control strong magnetic fields. Its high Curie temperature permits applications that would not be realisable with MUMETALL® or PERMENORM® 5000 H2, but coercive field strength and dynamic losses are distinctly higher than with the latter.
Typical magnetic properties after annealing
| Composition | 99,9 % Fe |
| µ40 (static) | ca. 1000 |
| Hc [A/m] | ca. 60 - 120 |
| Bs [T] | 2,15 |
| Curie-Temperatur [°C] | ca. 770 |
| Specific electrical resistance [µOhm * m] | 0,107 |
| Density [g/cm3] | 7,86 |
Futher Information
Flyer Soft Iron, PDF
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
DURACON® 45M
DURACON® 45M is a special CoNiFe alloy which combines mechanical hardness and strength with a very high thermal conductivity. It is therefore ideally suited for advanced mould and die tools for high productivity and/or excellent moulding impressions.
VACOMAX®, VACODYM®
VACOMAX® is the permanent magnet material of rare-earths and cobalt. These magnets feature especially high coercivities with simultaneously high saturation and excellent temperature and corrosion stability.
VACODYM® is the permanent magnet material offering the highest energy densities currently available.
Soft magnetic materials
Soft magnetic materials are essential components in many devices and are indispensable in modern electrical engineering and electronics. The wide range of applications, the steadily rising demands on the quality of components, devices and plants and ever increasing specialization call for a careful selection of the materials available in order to achieve the optimal solution.
Our focus is on metallic soft magnetic allloys, either crytalline from 80 % NiFe (MUMETALL®) to 50 % CoFe (VACOFLUX®), or amorphous (VITROVAC®) and nanocrystalline (VITROPERM®). We are familiar with alloy specific machining methods, from simple pre-cut parts to sophisticated composite systems.
In many applications soft magnetic alloys need to fulfil both mechanical and magnetic requirements. Or they need to be combined with other materials like permanent magnets or plastic materials.
Our service comprises the material selection based on all requirements, pre-cutting, machining, magnetic annealing, assembly to subsystems.
Dimensions
Thickness: ca. 20 µm – 2 mm
Width: 2,5 mm – 280 mm
Length: as demanded
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Alloys
Learn more about alloys for ribbons
MUMETALL® / VACOPERM® 100 / 80 % NiFe
CRYOPERM® 10
VACOFLUX® / VACODUR® / 50 % CoFe
PERMENORM® 5000 H2 / 50 % NiFe
TRAFOPERM® / Silizium-Eisen / 3 % SiFe
VITROVAC® 6025 X / 80 % Co
Dimensions
Thickness: ca. 20 µm – 2 mm
Width: 2,5 mm – 280 mm
Length: as demanded
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Alloys
Learn more about alloys for foils
MUMETALL® / VACOPERM® 100 / 80 % NiFe
CRYOPERM® 10
VACOFLUX® / VACODUR® / 50 % CoFe
PERMENORM® 5000 H2 / 50 % NiFe
TRAFOPERM® / Silizium-Eisen / 3 % SiFe
VITROVAC® 6025 X / 80 % Co
Dimensions
Thickness: 0,1 mm – 3 mm
Length: < 3000 mm
Width: < 750 mm
Sheets may be purchased complete or cut according to your requirements.
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Alloys
Learn more about alloys for sheets
MUMETALL® / VACOPERM® 100 / 80 % NiFe
PERMENORM® 5000 H2 / 50 % NiFe
VACOFLUX® 50 / 50 % CoFe
Soft Iron 99,9 % Fe
Dimensions
Diameter: 1 mm – 215 mm
Length: as demanded
Further possible material treatments
We cut, trim, slit, bend, stamp, weld and anneal – simple forms as well as more complicated geometries.
Thermal annealing
Please note, that with very few exceptions soft magnetic alloys, and in particular finished parts, need to be treated with a thermal annealing to obtain the desired magnetic properties.
Alloys
Learn more about alloys for rods
MUMETALL® / VACOPERM® 100 / 80 % NiFe
PERMENORM® 5000 H2 / 50 % NiFe
VACOFLUX® 50 / 50 % CoFe
Soft Iron 99,9 % Fe