Does one manufacturer use a "better" grade of S/S in their frames/slides than any other? - Or are the materials considered "trade secrets" and we'll never know the composition?
Let me clear something up, PH as in 17-4 PH means precipitation hardening. There are three common grades with respect to SS, 17-4, 15-5, and 13-8. They are used quite a bit in the aerospace industry, one example is landing gear. Other alloys that are precipitation hardened are some aluminums andOriginally posted by Metal Smith:
.... 17-4 PH (PH is for pre-heat-treated at the mill) is some tough stuff to machine, very strong steel
Yes, that is the true benefit of using PH alloys. You can machine to almost final dimensions in the annealed condition, much easier and faster, heat treat and final machine the part/assembly in less time than conventional heat treatable alloys.Originally posted by JiminCA:
The beauty of the precipitation hardening process is that it occurs at relatively low temps. Low heat treat temperatures equal less distortion of the workpiece.