Final answer:
The endurance limit of AISI 1020 CD steel depends on the given context or specific information.
Step-by-step explanation:
The endurance limit of AISI 1020 CD steel is the maximum stress level at which the material can withstand an infinite number of stress cycles without failure or fatigue. It is typically measured in terms of stress amplitude. Unfortunately, the information provided in the question is incomplete, as '235' does not have a clear context. It is important to specify the units or provide more information in order to accurately determine the endurance limit of AISI 1020 CD steel.