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Constantan is resistance alloy, its main compositions are copper and nickel,it has high resistivity, lower resistance temperature coefficient, wider operated termperature reange(<500.c) and it has higher anti-corrosion,heatproof, fine processing property and weldability, ten times of thermal electro-motive force versus copper compared with manganin,so it can make thermocouple(operation temperature<=500.c~600.c) and processing termperature below 500.c-current resistors, inductive resistors elements, fuses,electric vacuum. electrical light source elements and compensated conducting wires of thermcouple etc.
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