I am making a part for lifting a small weight of equipment by means of an api thread machined on the lifting part to mate with the lifted part. the drawing calls for AISI 1018. Due to availability I want to use AISI 1045. the weight might be a ton. The thread is api regular 3.3" dia, 5 tpi w/ 3" per foot taper. What could be the eventual problems resulting from this substitution?
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