17-7 PH is a precipitation-hardened stainless steel that is well suited for aerospace and other applications requiring high strength and good corrosion resistance and formability. Type 17-7PH is a Chromium-Nickel-Aluminum, austenitic stainless steel. It is the most formable of all PH grades and has the highest strength and hardness. It is less magnetic than other PH grades and offers minimal distortion upon heat treatment. This material maintains its valuable properties at temperatures up to 800° F (427° C).
Density: 0.282 lb/inch3
Melting Range: 2560 - 2625°F
Poisson's Ratio: 0.272
Electrical Resistivity: 463 Ohm-circ mil/ft
High tensile strength and hardness to 600°F
Corrosion resistant
Excellent oxidation resistance to about 1100°F
Creep-rupture strength to 900°F
Chemical Analysis
| C | .07 |
| Mn | 1.00 |
| Ph | .04 |
| S | .03 |
| Si | 1.00 |
| Cr | 15.0-17.5 |
| Ni | 3.0-5.0 |
| Cu | 3.0-5.0 |
| Cb + Ta | .15-.45 |
