BeCu

Beryllium copper (BeCu) is a precipitation-hardened copper alloy containing beryllium as the primary alloying element, known for combining high strength with excellent electrical and thermal conductivity. It is widely used in applications requiring both mechanical performance and electrical properties, particularly in aerospace, telecommunications, and precision instrumentation where weight savings and reliable electrical contact are critical. BeCu is valued over standard copper alloys and beryllium-free alternatives when designers need superior fatigue resistance, spring properties, and wear resistance without sacrificing conductivity—though its use requires careful handling due to beryllium's toxicity during processing.