Answer: AISI 1018 CD
Explanation: What is 1018 cd steel?
1018 Cold Finished Carbon Steel Bar | Alro Steel
1018 cold finished steel is a general-purpose, low-carbon steel with good case hardening qualities. It is especially suited to cold forming and bending operations. 1018 is suitable for parts that require cold forming (such as crimping, swaging, or bending).