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    Tungsten Wire

    Tungsten Wire
  • Tungsten Wire
  • Tungsten Wire
  • Tungsten Wire

    Standard: ASTM B760-86
    Material: W >99.95%
    Specific electrical: 0.055 Ohm x mm2/m resistance at 20 °C.
    Modulus of elasticity: 410 kN/mm2, at 20 °C.

    Tungsten Wire Applications

    Tungsten wire is universally used to make tungsten wire resistance for bulbs, lamps. It can also be used to make optical instruments, electric vacuum components, and high-temperature resistant parts. Tungsten wire is characterized by the highest melting point and excellent electric conductivity. It has a high-performance in sintering and high-temperature in recrystallization. For the above features, it can serve a long life in many applications.

    Dimensions and Tolerances of Tungsten Wire

    Tungsten wires’ diameters are generally expressed in inches or mils (thousandths of an inch). For thin wires from .001 inches up to .020 inches in diameter, the wire's diameter is measured by weight per unit length. That is, the weight expressed in mg of a 200 mm length of wire.
    The standard diameter tolerance is ± 3% of the weight measurement. Closer tolerances are available, depending upon the application for the wire product.

    Straightness of Tungsten Wire

    The wire may be finished in the unstraightened or as the drawn condition. The wire can also be straightened via mechanical or heat-treating processes. Typically, the measure of the straightness of a tungsten wire is obtained by cutting a ten inch long piece of wire and allowing it to lie on a flat, clean surface. The maximum deviation from a straight line along its length is the quantitative measure of its straightness. In general, as the degree of straightness increases, tensile strength decreases.

    Quality and Finish of Tungsten Wire

    The wire is free of scratches, kinks, and distortions because they are harmful to the product's intended end-use. Surface finish is supplied in the black, as drawn condition, where drawing lubricants and oxides are retained on the surface or in the cleaned condition by firing in hydrogen or electrochemical etching.

    Tungsten Wire Spooling

    The wire is free of scratches, kinks, and distortions because they are harmful to the product's intended end-use. Surface finish is supplied in the black, as drawn condition, where drawing lubricants and oxides are retained on the surface or in the cleaned condition by firing in hydrogen or electrochemical etching.

    Tungsten Wire Specifications

    Diameter (um) Length (m) Tolerance Weight (mg/200mm) Tolerance Dia. (mm)
    10<d<=18 >0.30-1 ±3 ±4
    18<d<=40 >1-5 ±2 ±2.5 ±3
    40<d<=80 >5-19 ±1.5 ±2.0 ±2.5
    80<d<=150 >19-68 ±1.0 ±1.5 ±2.0
    150<d<=300 >68-273 ±1.0 ±1.5 ±2.0
    300<d<=350 >273-372 ±1.0 ±1.5
    350<d<=500       ±1.5 ±2.0
    500<d<=1800       ±1.0 ±1.5

    Gold-Plated Tungsten Wire

    The most popular and legitimate application for gold-plated tungsten is as a corona discharge wire used to produce controlled electrical discharges in filtration and printing, as well as a variety of other processes.

    In addition to its use in air ionizers and in printing/photocopying, other interesting commercial and industrial applications of corona discharge include the following:

    • Removal of unwanted electric charges from aircraft surfaces
    • Manufacture of ozone for oxidation use
    • Sanitization of pool water
    • Scrubbing of particles from air conditioning systems
    • Removal of unwanted volatile organics (such as pesticides, solvents, or chemical weapons) from the atmosphere
    • Surface treatment of polymer films for use with adhesives or printing inks
    • Production of photons for Kirlian photography film exposure
    • Electrohydrodynamic (EHD) thrusters, lifters, and other ionic wind devices
    • Nitrogen laser
    • Surface treatment for tissue culture (polystyrene)
    • Ionization of samples for mass spectrometry or ion mobility spectrometry
    • Solid-state cooling components for computer chips

    The Data of Gold-Plated Tungsten Wire

    Diameter

    0.02 – 0.2 mm

    Tensile Strength

    56g/mg/200mm

    Gold-Plated Layer

    ≥99.99%

    Tungsten Content in The Core

    ≥99.92%

    Thickness of The Gold-Plated Layer

    0.3 um ± 10%

    Corrosion Resistance

    Soaked in concentrated nitric acid for 0.5 h at 80℃

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