High melting point refractory metals - WELD-TECH

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High melting point refractory metals


Suitable for high temperature applications!

Realy heavy metals as rod, sheets, foil or wires. We deliver according to your individual specifications and requests!
High-melting metals are characterized in particular by their high melting point, a very low coefficient of thermal expansion and good electrical and thermal conductivity. At room temperature they have a high resistance to acids. They are therefore described as very resistant materials.
Applications: Welding technology, medical technology, lighting industry etc..



    Tungsten (W) chemically pure 99.95% is a shiny grey, very brittle heavy metal with a very high density when pure.

          • W hardness HV 330 – 460
          • density 19.25 g/cm³20C)
          • Electrical conductivity 18.52 106 A V−1 m−1
          • Melting point 3695 K (3422 °C)
          • Available as round, square or rectangular bar and plate         Available as round bar, rectangular bar and square bar. Max. Length 350mm- 500mm
          • Tolerances according to customer specifications         Surface raw or machined (ground) according to customer specifications
          • Difficult to handle with milling machine


Tungsten lanthanum 1% (WL1%) is a shiny gray heavy metal that is easy to work with when alloyed. Alloy: 99% Tungsten 1% Lanthanum Oxide

      • Very good arc stability
      • Long service life with inert gas welding
      • Good ignition properties   very high specific weight
      • Good mechanical and machinability, much better than pure tungsten.
      • Highly economical production   radiation absorption
      • Good strength properties
      • Very corrosion and erosion resistant
      • Great stability and resistance to deformation   Elongation values of 10-15%
      • Alloy: 99% tungsten 1% lanthanum


Molybdenum (Mo) chemically pure 99.95% is a gray shiny metal

        • Hardness HV 160 - 250
        • Density 10.28 g/cm³
        • Electrical conductivity 18.2 M/ohm mm²106 A V−1 m−1
        • Melting point 2896K 2623°C
        • Molybdenum has the lowest coefficient of thermal expansion (CTE) of all pure materials
        • Available as bars, plates, square and rectangular bars.
        • Max length 300-500mm
        • Surface raw or mechanically processed (ground) to tolerance or according to customer specifications                                                   


Titanium Zirconium Molybdenum (TZM) Ti 0.44-0.55% Zr 0.06-0.12% balance Molybdenum is a gray lustrous metal.

            • Density: 10.1 g/cm³
            • Vickers hardness: 220 - 320
            • HV Hardness HV 200-250
            • Tensile strength approx. 85% formed N/mm² 800-1,000 Yield strength N/mm² 750-900
            • Elongation L=5D% 6-10 Modulus of elasticity kN/mm² 300
            • Physical properties Electrical conductivity 20 °C (293 K) MS/m approx. 15
            • Electrical resistance 20 °C (293 K) Ω•mm²mca. 0.06
            • Temperature coefficient of electrical resistance 1 K approx. 0.0046
            • Temperature coefficient of thermal expansion 0-300°C (273-573 K)1
            • Good strength properties at temperatures up to 1400 °C.
            • The recrystallization temperature of TZM is approximately 250°C higher than molybdenum and TZM offers better weldability.
Components for heat treatment plants,
spot welding electrodes    hot runner nozzles,


Tungsten copper 80% W / 20% Cu Tungsten copper is a composite material and has a heterogeneous structure

      • Hardness HV approx. 240
      • Density approx. 15.3 g/cm³
      • Electrical conductivity approx. 21.6 M/Ohm mm²
      • Available as a round rod from ø 4 mm to 20 mm     Max length 300mm - 500mm
      • Surface raw or machined (ground) according to customer specifications
      • Density (mass) to (15-15.5 g cm²)
      • Dimensionally stable and has high thermal conductivity
      • Good strength (service life)

EDM electrodes, balance weights, high voltage interrupters, welding electrodes, electrical contacts, darts/sports equipment, aerospace, shielding, power engineering and in various industrial applications. Tungsten copper is used wherever other copper materials are at their performance limits. (welding, eroding)
Tungsten copper can be machined well with carbide tools. If the cutting pressure is too high, fine contours can easily break out. A correspondingly small feed rate or grinding machining is therefore recommended for this heterogeneous material. Tungsten copper has a completely fibre-free, fine-grain structure with high hardness and a high modulus of elasticity.

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