The performance of metal materials is generally divided into two types of process performance and performance. The so-called process performance refers to the performance of the metal material in the process of manufacturing, the performance of the metal material under the specified cold and hot processing conditions. The quality of the metal material process determines the adaptability of the metal forming process. Due to the different processing conditions, the required process performance is also different, such as the casting properties, weldability, malleability, heat treatment performance, cutting processability and so on. The so-called use of performance refers to the performance of mechanical parts under the conditions of use, the performance of metal materials, including mechanical properties, physical properties, chemical properties. The quality of the use of metal materials determines its scope of use and service life.