根据相关资料,随着我国特种设备法律法规及标准的日趋完善和成熟,近年来特种设备事故率呈明显的下降趋势。但是,相对于欧美发达国家,我们的事故率仍然高达其5～6倍,其中相当部分的事故直接或间接的和错用材料及选材不当有关系。且随着近年来锅炉压力容器等特种承压设备的运行参数的进一步提高,对材料的性能要求也越来越苛 According to the relevant information, as China’s special equipment laws and regulations and standards are increasingly perfect and mature, the accident rate of special equipment has shown a clear downward trend in recent years. However, compared with the developed countries in Europe and the United States, our accident rate is still as high as 5 to 6 times. A considerable number of accidents are directly or indirectly related to misuse of materials and improper material selection. And with the further improvement of operating parameters of special pressure-bearing equipment such as boilers and pressure vessels in recent years, the performance requirements of materials are also becoming more and more demanding