Beryllium copper (
BeCu), also known as
copper beryllium (
CuBe),
beryllium bronze and
spring copper, is a
copper alloy with 0.5—3%
beryllium and sometimes with other alloying elements. Beryllium copper combines high strength with non-magnetic and non-sparking qualities. It has excellent
metalworking, forming and machining qualities. It has many specialized applications in tools for hazardous environments, musical instruments, precision measurement devices, bullets, and aerospace. Beryllium-containing alloys create an inhalation hazard during manufacturing due to their toxic properties.