"SteveB" wrote in message
I need a piece of round shaft about 18" long. It is for the bucket on a
loader, being the pin it swivels on. The ends are held in by mechanical
stops, no welding or fancy stuff. Looking at Metal Depot and the like,
and there are lots of different steels. Which steel should I use? I
want one hard enough to resist repeated abrasion. It will be lubricated
by common grease gun. Suggestions for number of steel type? I have
found these for $25 or less. Final length to be determined by
measurement. Anyone got a piece laying around? One inch diameter.
Cold rolled would probably do the trick, but while I have it apart, I
thought I'd put something in there that will last a long time.
You have recommendations here to case-harden. I'm not going to try to judge
this, because I don't have experience with the application.
But, if you decide to go that route, here are two thoughts: The ideal steels
for carburize-case-hardening are 1020, 8620, and 4620. You want to start
with a low-carbon steel. And a job like this is not something to do with a
torch at home. The best is to find a heat-treater who will throw your piece
in with his next batch and do it cheap.
If he's running carbo-nitriding, that's good: harder than carburizing,
softer than nitriding, the case thickness falls in between and should be
adequate for your job.
I'm not recommending this, just pointing out the best way to go about making
a case-hardened pin.