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M A T E R I A L s

1. Carbon and Graphite

2. Other materials


1.1. Materials for ELECTROTECHNICS

For current transfer we offer Graphite, Electro-graphite, Copper-graphite, Silver-graphite, Carbon-graphite and Bakelite-graphite. The ranges of basic material characteristics are listed in the table below:

Density 1.4 (graphite) - 6.8 (silver-graphite) g/cm3
Specific resistance 0.03 (silver-graphite) - 2400 (bakelite-graphite) Ω mm2/m
Current density (recom.) 5 (bakelite-graphite) - 40 (silver-graphite) A/cm2
Circumferential velocity (max.) 18 (electro-graphite) - 80 (graphite) m/s

Products: brushes, grounding brushes and rings, contacts, contact strips, ...

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1.2. EXTRUDED materials

The ranges of basic material characteristics are listed in the table below:

Density 1.65 - 1.82 g/cm3
Specific resistance 5 - 18 Ω mm2/m
Compressive strength 14 - 42 N/mm2
Flexural strength 22 - 60 N/mm2
C.T.E. 1.4 - 2.5 10-6 / K
Heat conductivity 120 - 180 W / mK

Products: plates, linings, tubes, electrodes, heating rods, crucibles, moulds, stirrers...

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1.3. MOULDED materials

The ranges of basic material characteristics are listed in the table below:

Density 1.75 - 1.83 g/cm3
Specific resistance 14 - 38 Ω mm2/m
Compressive strength 53 - 170 N/mm2
Flexural strength 24 - 60 N/mm2
C.T.E. 3.5 - 5 10-6 / K
Heat conductivity 50 - 110 W / mK

Products: bearings, sealings, sealing rings, vanes, blades, plates, crucibles, ...

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1.4. ISOSTATIC materials

The ranges of basic material characteristics are listed in the table below:

Density 1.74 - 1.92 g/cm3
Specific resistance 9.5 - 21 Ω mm2/m
Compressive strength 63 - 137 N/mm2
Flexural strength 30 - 88 N/mm2
C.T.E. 3.3 - 5.6 10-6 / K
Heat conductivity 75 - 139 W / mK

Products: moulds, crucibles, electrodes, plates, bearings, sealing rings, ...

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1.5. Carbon and graphite SPECIALITIES

In this category you can find materials with carbon fibers (composites, foils and felts, cords and braids, ...) , materials such as boroncarbid, wolframcarbide and composite-carbide. Graphite spray and emulsion are newly available.
COMPOSITES have very high strength (flexural strength up to 185 N/mm2, compressive strength up to 350 N/mm2) and maintain all conventional graphite characteristics . Therefore they are more frequently used in those instances, where high-strength materials and materials with high thermal resistivity and stability are required.
We have a full range of carbon and graphite foils, felts, cords, and braids for thermal insulation and for sealing components
Boroncarbid and similar materials are most often used for production of shot blast nozzles.

Products: plates, heating elements, protective and insulating foils, sealing cords and braids, insulating linings, spray, shot blast nozzles, ...

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2.1. OTHER materials

According to customer requirements we can offer non-carbon and non-graphite materials such as:

-pumice
-asbestos free isolation plates
-boron nitride spray and suspension
-and many others .....

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