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17-7 PH is a precipitation hardening stainless steel that provides high strength and hardness, excellent fatigue properties, good corrosion resistance, good formability, and minimum distortion upon heat treatment. Alloy 17-7 PH provides valuable property combinations particularly well suited for aerospace applications. This special alloy also provides benefits for other applications requiring high strength and good corrosion resistance, as well as excellent properties for flat springs at temperatures up to 315°C (600°F ).
Availability 17-7PH is available in Sheet, Strip, Plate, Bars, Tube, Forgings. 17-7PH Foil (Shim) is available in various thicknesses. View stock list for further information. Foil Stock List, Sheet/Plate Stock List.
Specifications Type 17-7 PH Stainless Steel is covered by the following specifications: AMS 5528 Sheet, Strip and Plate AMS 5529 Sheet, Strip Cold Rolled AMS 5568 Welded Tubing AMS 5644 Bars and Forgings (Cap. ASTM A 564 Type 631) AMS 5678 Wire AMS 5824 Welding Wire MIL-S-25043 Cond. C, Sheet, Strip and Plate ASTM A 693, ASTM A 313, ASTM A 564, ASTM A 579 and ASTM A 705 ASME SA 564, SA 693 and SA 705 UNS S17700
Corrosion Resistance 17-7 PH provides corrosion resistance in conditions TH 1050 and RH 950 is generally superior to that of the standard hardenable chromium types of stainless steels such as Types 410, 420 and 431, but is not quite as good as chromium-nickel Type 304. Corrosion resistance in Condition CH 900 approaches that of Type 304 in most environments.
Formability In Condition A, Alloy 17-7 PH can be formed comparably to Type 301. It work hardens rapidly and may require intermediate annealing in deep drawing or in forming intricate parts. Spring-back is similar to that of Type 301. Alloy 17-7 PH is extremely hard and strong in Condition C. Therefore, fabrication techniques for such materials must be used.
Typical Mechanical Properties
Disclaimer Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.
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