Since the material used for the mandrel in this design is 4140, it can be seen from ASME Boiler and pressure vessel code that the yield strength of 4140 at 125 ° C is 930mpa. Consider a safety factor of 1.5
In this design, the material of mandrel is 4140, and referring to ASME Boiler and Pressure Vessel Code, we can know that the yield strength of 4140 at 125°C is 930Mpa. Considering the safety factor of 1.5