Molybdenum (Mo) - Molybdenum alloys

We supply molybdenum with a purity of over 99.8 %. Like tungsten, molybdenum is a refractory metal with a high melting point. It has outstanding thermo-physical, mechanical and chemical properties.

By means of targeted and precisely controlled alloying procedures, we obtain molybdenum alloys with enhanced properties – exactly tailored to meet the strictest demands in the field of high-tech. These include, for example: molybdenum-lanthanum (ML), titanium-zirconium-molybdenum (TZM), molybdenum-copper (MoCu), molybdenum-tungsten (MoW).

Corrosion behavior of molybdenum
Molybdenum displays good resistance to most acids, alkaline solutions and non-metals. (Prerequisite: humidity < 60%; each individual application must be given separate consideration). At temperatures over 100°C, molybdenum is volatile in alkaline fluids and in fluids that give off oxygen. Molybdenum is very resistant to oxygen, nitrogen, noble gases, glass and molten metals – even at very high temperatures. Its corrosion behavior in connection with certain media can be further improved by forming alloys with other refractory metals.

Processing
Compared to tungsten, molybdenum can be formed at a lower temperature and is easier to process. Attention must be paid to the brittle-ductile temperature during forming - the thicker the material, the higher the preheating temperature. Molybdenum loses its brittleness above the brittle-ductile temperature - it can be reliably formed without cracking. It can also be cut, punched and machined with the correct preheating temperature.
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The most important properties of molybdenum
  • High melting point of 2620°C (2893K)
  • Low vapor pressure
  • High elastic modulus
  • Extremely high thermal stability and creep resistance
  • High thermal conductivity
  • Low expansion coefficient
  • Outstanding corrosion resistance
  • Good machinability
Applications
  • Stirrers for molten glass and metal
  • Carrier for power electronics in the semi-conductor technology
  • Components, heating elements in annealing furnaces, sintering systems
  • Evaporation crucibles
  • Thermo-protection tubes
  • Anti-friction coating
  • Power supply wires in light bulbs
  • Mesh wires
  • Anti-glare shields in automobile headlights
  • Components in the chemical industry
  • Catalytic converter components
  • Heat sinks
Available forms
  • Wires
  • Round rods
  • Profiles
  • Formed parts based on drawings

Molybdenum-Lanthanum oxide (ML)

Tiny quantities of lanthanum oxide particles (doping) change the microstructure of molybdenum considerably. With ML the doping amounts to 0.3 to 0.7 % of lanthanum oxide by weight. A fiber structure is created with fine grained (La₂O₃) particles.

ML is more creep resistant and has a higher recrystallization temperature than pure molybdenum. ML displays good weldability with itself and with other metals. The mechanical machinability of ML is better than that of pure molybdenum.
Application
  • In the lighting industry for retaining wires and feed wires
  • In the furnace industry for heat conductors, ribbons, wires
  • Sintering boats
  • Evaporating coils
  • Electrodes
Available forms
  • Profiles
  • Rods
  • Sheets
  • Components based on drawings and ready for mounting

Titanium-Zirconium-Molybdenum (TZM)

Adding small quantities of titan and zirconium and traces of carbon to the alloy results in enhanced specific properties. TZM is stronger compared to molybdenum, it has a higher recrystallization temperature (≥250°C) than pure molybdenum and better creep resistance. Good machinability. Used at temperatures between 700 and 1400°C.
Applications
Because of its specifically enhanced properties, TZM is used in
  • High-temperature technology
  • Hot channel nozzles
  • Anodes in x-ray tubes
  • Molds
  • Components in heat treatment equipment
  • Dies for isothermal forging
  • Hot channel nozzles in material technology
Available forms
  • Profiles
  • Rods
  • Sheets (no foils)
  • Components based on drawings and ready for mounting

Molybdenum-Copper (MoCu)

Molybdenum-copper is a composite material with up to 35% copper by weight. This ideal combination unites the good heat conductivity of copper with the low thermal expansion of molybdenum. Molybdenum-copper is excellently suited as a switching contact for high and medium voltage, as a component for passive heat dissipation (heat sinks) as well as for electrodes for electrical discharge machining and in electric resistance welding.
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