It can be seen that the maximum stress of the part is 163.2mpa.<br>For the required stress of materials, according to Chapter 1 of Chapter 1, Volume 1 of "Mechanical Design Manual (Sixth Edition)":
It can be seen that the maximum stress of the parts is 163.2Mpa. For the required stress of materials, according to the first chapter of the first part of the first volume of the Mechanical Design Manual (6th edition), there are: