Official Answer
Answer
Beryllium Copper (Alloy 25, UNS C17200) is specified for its unique combination of high strength (comparable to steel), excellent electrical conductivity, and non-sparking properties. It is also non-magnetic, making it ideal for MRI medical equipment or sensitive electronic sensors. BeCu rings are typically age-hardened at $600^{\circ}F$ to achieve their full spring properties. Additionally, BeCu offers excellent corrosion resistance in marine environments. However, due to the toxicity of beryllium dust during manufacturing and the high material cost, its use is restricted to applications where these specific properties are mandatory.
