Official Answer
Answer
Beryllium Copper (typically Alloy 25, C17200) should be selected when the application requires: 1) Non-sparking properties (essential in oil and gas explosive environments); 2) High electrical conductivity; 3) Excellent corrosion resistance to seawater; or 4) Non-magnetic behavior. CuBe can be age-hardened to achieve tensile strengths up to 200 ksi, which is comparable to many steel alloys. However, it is significantly more expensive and requires specialized handling during manufacturing due to the toxicity of beryllium dust. Its modulus of elasticity is lower ($E \approx 19 imes 10^6$ psi), meaning the ring will be more flexible for a given thickness.
