This tool string is entirely BeCu-free (with the excpetion of the threaded ring on the end), has seen over 360 hours of down-hole time, and is ready to handle a lot more.
The Barrel is Nitronic-50, the battery intermodule and interconnects are SMS-167, and the rest 316 stainless steel. None of these parts experienced any galling issues whatsoever.
Here's a closer look at each component:
For comparison, have a look at the damage to the BeCu threaded ring on the same tool, exposed to the same conditions:
Next week, we put together the full string without BeCu, and send it downhole. Check back on Monday for the send-off.