Track pins

[tankbarrell]

There are other things to consider in this problem. Manganese track work hardens so the pin holes will not wear as much as might be thought after settling in.
Much of the hole and pin wear is to do with the grit getting in and acting as a grinding paste. Relative hardness is less important than a tough pin.

There is not much material in the link to fit a bush and I would have thought the work involved initially as well as at the point of fitting new bushes would be greater than having new track cast.