Sometimes referred to as "Radio Alloys," these copper-nickel alloys posses resistivities between copper and the CarTech CUPRON® alloys. They have been used in both wire and ribbon form where low to moderate resistivity is required. Their range of resistivity has enabled designs to be made with convenient sizes and desired resistance.

The number designation of each alloy corresponds to its specific resistivity. 30 alloy, closest in resistivity to copper, has been used in applications where only a small amount of resistance is required and relatively high temperature coefficient can be tolerated. In contrast, CarTech 180 alloy, closest to the CarTech CUPRON alloys, has been used where significant resistance is required or where a lower temperature coefficient of resistance (TCR) is necessary.

Applications for these alloys have included lead wires for resistors, heater wires for electric blankets, fuse wires, support wires and wire used in high-resistance magnetic coils.