Pin material ?

   I managed to lose one of the pins that hold the lift link clevis to the lower arms on my "new" tractor - adjustment turnbuckle was froze up from several years sitting out in the woods . I made one from some mystery steel I have on hand but I got to wondering if I should have used some of the 4140 I have on hand or maybe case hardened it . The 4140 is larger diameter , so more waste . I hate wasting material if I don't have to . For all I know the piece I used is alloy , but it isn't marked . I usually mark bought material but found or gifted stock I don't always know what I've got so ...
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Snag
We live in a time where intelligent people
are being silenced so that
stupid people won't be offended.