Official Answer
Answer
Beryllium Copper (Alloy 25) should be specified in three scenarios: 1) Non-magnetic requirements, such as in MRI machines or sensitive electronic sensors where steel would interfere with magnetic fields; 2) Non-sparking environments, such as oil refineries or explosive handling, where a steel ring striking a surface could ignite vapors; and 3) High electrical conductivity requirements. CuBe2 has a tensile strength comparable to alloy steel (up to 1400 MPa) but with a much lower modulus ($E \approx 130$ GPa). This lower modulus must be accounted for in the design, as it will result in lower grip pressure and lower rotational speed limits compared to a steel ring of the same dimensions.
