Currently we are using a material that I am told is a modified 4340 called 300M. The shafts that fail show helical cracks down the length of the shaft. The failures have all shown up in trucks that are subjected to large amounts of towing. The currently the shafts are machined from 300M billet...
I am trying to make a tubing assembly for a dual fuel pump system my company sells. The working pressure of the system is 28,000 psi. The factory high pressure fuel lines are 8mm OD and 3mm ID. They are made of a steel alloy. I am trying to find a tubing supplier or someone who will build the...
