A beryllium cobalt copper alloy and its production method. This beryllium cobalt copper alloy is mainly used for making crystallizer liners used in cast steel, and can also be used for making other products with similar usage conditions and environments.

When casting steel, people have high requirements for the accuracy and heat transfer rate of the steel casting mold. Often, a layer of high-precision and good heat transfer rate inner liner is needed in the mold. Currently, some copper alloy inner liners are mainly used, but their accuracy, pressure resistance, heat transfer rate, and service life are not very good.