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Old 07-06-2020, 05:14 PM   #3
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Join Date: Dec 2018
Location: Humboldt, TN
Posts: 6
Default Re: O/T What material would you use for new axle shafts?

I agree with Mr. Neilson. The air hardening tool steels would be brittle. I would use 4140 as machined. It will work harden some in use and should hold up well in the splines, and less likely to break out a key way.
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