Official Answer
Answer
Beryllium Copper (typically Alloy 25, UNS C17200) is used for wave springs in electronics due to its excellent electrical conductivity and non-magnetic properties. Beyond conductivity, it can be heat-treated to reach tensile strengths up to 200 ksi, comparable to some steels. This allows the spring to function as both a high-force mechanical contact and an EMI/RFI shield. In medical or scientific equipment like MRI machines, its non-magnetic nature is essential. The material is typically aged at $600^{\circ}F$ to achieve its maximum spring properties. However, designers must be cautious of its cost and the environmental regulations regarding beryllium handling during the manufacturing phase.
