Precision alloy, namely functional metallic materials, are metals and alloy that possess special physical properties. They can convert light, sound, magnetism, heat, pressure, displacement, angle, weight, speed, acceleration, etc. into electrical signals, or convert one type of physical quantity into another, thereby realizing the sensing, conversion and transmission of energy and signals.

There are many types of precision alloy, including different alloy matrices, such as iron base, nickel base, cobalt base, titanium base, copper base, manganese base, niobium base, vanadium base and noble metal base, with widely varying performance requirements.