... Constantan wire(CuNi40) wire Size: 0.1mm-8mm Electric heating wire: NI80Cr20, Ni70Cr30, Ni60Cr15, CuNi45, CuNi40, ... CuNi34 etc. Constantan wire(CuNi40) wireSize: 0.1mm-8mmElectric heating wire: NI80Cr20, Ni70Cr30, Ni60Cr15, CuNi45, CuNi40, CuNi34, ... performance of Ni-Cr and Ni-Cr-Fe electric heating alloys Grade property performanceCr20Ni80Cr30Ni70Cr15Ni60Cr20Ni35Cr20Ni30% Main Chemical Composition ...