Copper alloys containing beryllium as the main alloying element are called beryllium copper alloys. Beryllium copper alloy is the most widely used among beryllium alloys, accounting for more than 90% of all beryllium alloy consumption. Beryllium copper alloys are divided into high beryllium high strength alloys (containing beryllium 1.6%-2%) and low beryllium high conductivity alloys (containing beryllium 0.1%-0.7%) according to the beryllium content. The beryllium content in beryllium copper series alloys is generally less than 2%. In the early days, beryllium copper belonged to military products, and its applications were concentrated in military industries such as aviation, aerospace, and weapons; in the 1970s, beryllium copper alloys began to be widely used in civilian fields. Now beryllium copper is widely used in electronics, telecommunications, computers, mobile phones and precision instruments, and other applications. The spring is made of beryllium copper, which has a large elastic coefficient, good formability, and long service life; it can suppress overheating and fatigue when manufacturing electronic components; Achieve high reliability and miniaturization of equipment; manufacture electrical switches, which are small, light, and highly sensitive, and can be repeated 10 million times. Beryllium copper also has good castability, thermal conductivity, and wear resistance. It is an ideal casting and forging material. It can be used as a structural material for safety tools, precision castings, and repeater of submarine communication cables. It can also be used to manufacture high precision, The film cavity of the plastic molding mold with complex configuration.