17-4 PH is a chromium-nickel grade of stainless that may be hardened by a single low temperature precipitation-hardening heat treatment. Excellent mechanical properties at a high strength level may be obtained by such treatment. Scaling and distortion is minimized. 17-4 PH should not be used in the solution treated condition. The strength and corrosion resistance properties of 17-4 hold up well is service temperatures up to 800° F. Fabrication techniques for this steel is similar to those established for the regular stainless grades. 17-4 machines well, has excellent welding characteristics, and forges easily. The combination of good mechanical and processing properties makes this grade adaptable to a wide range of uses.