Supermalloy is an alloy composed of nickel (75%), iron (20%), and molybdenum (5%).
It is a magnetically soft material. The resistivity of the alloy is 0.6 Ω·mm2/m (or 6.0 x 10−7Ω·m). It has an extremely high magnetic permeability (approximately 800000 N/A2) and a low coercivity. Supermalloy is used in manufacturing components for radio engineering, telephony, and telemechanics instruments.