Products

Periodensystem mit allen verwendeten Elementen

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


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

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 applications

Tungsten silver


Composition 50-85 % by weight W, balance Ag
as contact material in the low voltage range for switching in air,
as electrode material

Tungsten carbide silver


Composition 40-75 % by weight WC, balance Ag
as contact material in the low voltage range for switching in air

Silver nickel


Composition 15-40 % by weight Ni, balance Ag
as contact material in the low voltage range for switching in air

Silver 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 current

Tungsten 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 current

Tungsten 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 < 5kA

Tungsten 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