I am replacing one of the ram rollers on my 5# Beaudry Utility Hammer. I was told to use 2" round D2 for the rollers and a machinist is turning them for me. I only have a gas forge for tempering. I do have access to stainless foil heat treat bags and an infrared temperature gun. The instructions for heat treating D2 may be more specific than I can manage. Do I need to send it out or is this something I can do myself. It is holding the heat for a consistent temperature over an hour that has me concerned. Any suggestions.

Strongly recommend finding a commercial heat treatment service that can handle this for you. The risk of catastrophic failure and the potential damage it could cause more than justify the possible cost. Besides, if improper heat treatment leads to fatal consequences, your heirs will have someone to sue.

thanks I am going to switch to A2 which is much more forgiving