Copper C17510 (Nickel-Beryllium Copper) trades some of C17200's extreme strength for substantially better electrical conductivity. This makes it the better choice when both performance and conductivity matter more than peak strength alone.
C17510 uses a lower beryllium content than C17200, combined with nickel, positioning it at the lower-strength, higher-conductivity end of the beryllium copper family – typically 45-60% IACS, more than double C17200's conductivity, with somewhat lower peak tensile strength.
Like other beryllium-bearing alloys, machining generates beryllium dust requiring strict exposure controls.
It retains good resistance to stress relaxation and good strength at elevated temperatures, and is therefore a good option for automotive, telecom, and oil and gas industry components that need a strong balance of conductivity and durability under sustained electrical or thermal load.