chemically pure, unalloyed
round, with 1.5 to 22 mm diameter disks, flat or doomed, soldered as
rivets to a support and rods in production length square profiles,
plates and semi-finished parts on request
Products
The gases and metals we use to produce finished products are spread well over the Periodic Table of Elements. They are proof, on the one hand, of the flexibility of our powder metallurgic processes, and on the other, of a wide application spectrum for our products in the sectors of research, industry and electrical engineering.
All dimensions and compositions specified in the following are standard values. We will be happy to supply details of non-standard dimensions and compositions on request.
With the exception of the refractory pure metals tungsten and molybdenum, all the metals we produce are composite metals, i.e., composites consisting of metals that cannot (or only to a minor extent) be alloyed with one another, and that have unusual chemical, physical, and mechanical characteristics. This opens up a spectrum of uses far beyond the range of pure metals.
- Tungsten
-
surface black swaged or ground
Tungsten, pure
Tungsten with additive
with 1-2% by weight of lanthanum oxide additive (WL10 / WL15 / WL 20),
with 2% by weight of cerium oxide additive (WC 20),
round, 1 to 13 mm diameter in production length
square profiles, plates and semi-finished parts on request
- Molybdenum
-
chemically pure, surface swaged or ground
round up to 30 mm diameter
square profiles, plates and semi-finished parts on request
- Composite metals
-
sintered under protective gas, dimensions to customer’s specifications for use as contact material, electrode material and for special applications
Tungsten copper
Composition 60-90 % by weight W, balance Cu
as standard contact material for all voltage ranges for switching in air and under oil and SF6, as electrode material for spot welding, spark erosion and for special applicationsTungsten silver
Composition 50-85 % by weight W, balance Ag
as contact material in the low voltage range for switching in air,
as electrode materialTungsten carbide silver
Composition 40-75 % by weight WC, balance Ag
as contact material in the low voltage range for switching in airSilver nickel
Composition 15-40 % by weight Ni, balance Ag
as contact material in the low voltage range for switching in airSilver graphite
Composition 2-15 % by weight C, balance Ag
as contact material in the low voltage range for switching in air,
ensures reliable opening of contact parts
- Composite metals, low-gas content
-
sintered in a vacuum for use in vacuum interrupters and vacuum switching devices
Chromium copper
- in disks, up to max. 150 mm diameter
-
sintered in solid state
Composition 25-65 % by weight Cr, balance Cu
for medium-voltage, high-voltage, high-current
applications and for contactors -
sintered in liquid Cu phase
Composition 25-60 % by weight Cr, balance Cu
for special applications -
arc-melted
Composition 25-50 % by weight Cr, balance Cu
for special applications
Tungsten carbide silver
Composition 60-75 % by weight WC, balance Ag
dimensions: disks up to max. 75 mm diameter
for applications in the low-voltage range up to 7.2 kV,
with low chopping currentTungsten carbide silver cobalt
Composition 60-75 % by weight WC, 2-5% by weight cobalt, balance Ag
dimensions: disks up to max. 75 mm diameter
for applications in the low-voltage range up to 7.2 kV,
with low chopping currentTungsten copper
Composition 68-90 % by weight W, balance Cu
Dimensions: disks up to 35 mm diameter
for applications at voltages < 10 kV and switching currents < 5kATungsten copper antimony
Material as above, however with 1 % by weight Sb, to minimise chopping current and improve welding resistance.
- Heavy metals
-
Composition: 90-95 % by weight W
balance Ni and Fe (ferromagnetic) or Ni and Cu (paramagnetic)
composite metals with high tungsten content, i.e. a high density,
that are however comparatively easy to machine