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An Article to Understand the Origin and Performance of Tellurium Copper

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    In a mine pit in Romania, Franz Joseph Muller from Vienna, the capital of Austria, discovered a mineral known locally as "strange gold." Sixteen years later, German mineralogist M. H. Klaproth dissolved the mineral in aqua regia, used excess alkali to partially precipitate the solution, removed gold and iron, and discovered this new element in the precipitate. He named it tellurium, with the element symbol Te. In the 1960s, the United States developed a high-conductivity and easy-to-machine copper alloy material to meet its industrial development needs, filling the gap in precision processing materials for copper alloys, namely C14500 tellurium copper alloy.

    QTe0.3 Element Composition (%)

    ElementContent
    Cu+Ag≥99.9
    Te0.20–0.35
    Bi＜0.001
    Fe＜0.008
    Pb＜0.01
    Zn＜0.005
    Ni＜0.002
    Cd＜0.01

    Due to its excellent machinability, superior electrical and thermal conductivity, and corrosion resistance, along with good hot and cold processing performance, the C14500 tellurium copper alloy is widely used in high-conductivity, high-corrosion precision electronic and electrical components, high-end electromechanical parts, modules and threaded cutting parts, plumbing fittings, electrical contacts, plasma and laser cutting parts, automobile starters and switch components, and other fields.

    Physical Properties:

    ItemValueUnit
    Density8.93g/cm³
    Electrical Conductivity87%IACS
    Thermal Conductivity350W/(m·K)
    Coefficient of Thermal Expansion18.010⁻⁶/K
    Elastic Modulus125GPa

    Mechanical Properties:

    ConditionHardness (HV1)Tensile Strength (MPa)Elongation % (A100)
    O45–70170–250≥25
    1/2H70–110250–350≥20
    H110–130≥350≥10

    Jintian Copper Industry has focused on copper processing for over thirty years, owning more than 40 subsidiaries and having production bases and research centers worldwide. It is a globally renowned copper processing company. The company not only produces high-end copper strips and phosphor bronze rods but also manufactures copper pipes, copper wires, copper bars, copper plates, electromagnetic wires, and magnetic steel products.

    The tellurium copper rods produced by Jintian Copper Industry are extruded with a 3250T large-tonnage press, featuring uniform structure, stable product performance, excellent surface quality, and superior machinability, arc resistance, and corrosion resistance, with conductivity of 85–94% IACS. They are widely used in new energy vehicle electrical connectors, plasma cutting nozzles, communication connector components, and more. Feel free to contact us for inquiries at: 0574-83005999.

    References
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