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        • Product Name  Silver tungsten
        • Views   264

                      

          Silver tungsten materials are used in industrial and domestic circuit breaker applications where good weld and erosion resistance is important. Various grades are available: - the higher silver grades have higher conductivity, and the higher tungsten grades have greater erosion and weld resistance.
          High contact pressures are required to ensure effective operation if used for frequent high current switching, where mixed oxides of silver tungsten can be formed, giving high contact resistance.
          Silver tungsten alloys contain between 25-50% silver and are mainly used for electrical contacts—generally heavy-duty devices subject to high current, such as circuit breakers, earth leakage breakers and miniature circuit breakers.

         

        Name
        Chemical symbol
        Chemical composition(%)
        Physical and mechanical properties
        Ag
        Impurity
        W
        Density/
        (g/cm3)
        Hardness
        HB
        Resistivity
        (μΩ·cm)
        silver-tungsten(30)
        AgW(30)
        70±1.5
        ≤0.5
        allowance
        11.75
        75
        2.3
        silver-tungsten(40)
        AgW(40)
        60±1.5
        ≤0.5
        allowance
        12.4
        85
        2.6
        silver-tungsten(50)
        AgW(50)
        50±2.0
        ≤0.5
        allowance
        13.15
        105
        3
        silver-tungsten(55)
        AgW(55)
        45±2.0
        ≤0.5
        allowance
        13.55
        115
        3.2
        silver-tungsten(60)
        AgW(60)
        40±2.0
        ≤0.5
        allowance
        14
        125
        3.4
        silver-tungsten(65)
        AgW(65)
        35±2.0
        ≤0.5
        allowance
        14.5
        135
        3.6
        silver-tungsten(70)
        AgW(70)
        30±2.0
        ≤0.5
        allowance
        14.9
        150
        3.8
        silver-tungsten(75)
        AgW(75)
        25±2.0
        ≤0.5
        allowance
        15.4
        165
        4.2
        silver-tungsten(80)
        AgW(80)
        20±2.0
        ≤0.5
        allowance
        16.1
        180
        4.6
        silver-tungsten(85)
        AgW(85)
        15±2.0
        ≤0.5
        allowance
        16.7
        195
        5