Beryllium nickel copper is a copper base alloy with supersaturated solid solution. It is a nonferrous alloy with good combination of mechanical properties, physical properties, chemical properties and corrosion resistance. After solution and aging treatment, it has the same high strength limit, elastic limit, yield limit and fatigue limit as the special steel; At the same time, it also has high conductivity, thermal conductivity, high hardness, wear resistance, high creep resistance and corrosion resistance. It is widely used in the manufacture of various mold inserts, replacing the welding electrode materials for molds with high precision and complex shapes made of steel, die-casting machines, injection molding machine punches, wear and corrosion resistant work, etc.