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17-7 PH - Precipitation Hardened Stainless Steel

17-7 PH® is a martensitic 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 Specifications
17-7 SS
17-7 Stainless Steel
AISI Type 631
PH 17-7
UNS S17700
Alloy UNS S17700
Grade 631
Type 631
Coil, Sheet, Strip and Plate
AMS 5528

Sheet and Strip–Cold Rolled
AMS 5529

AMS 5644

Custom Shapes


Rod, Flats, Square, Coil, Plate, Sheet, Strip.
17-7 PH sheet sizes: 17-7PH sheet sizes

Compliance: Metals distributed by and thru MasterSource Company Inc. are in compliance with Section 1502 of the Dodd-Frank Act pertaining to conflict minerals.


PH 17-7 PH® is a registered trademark of Armco, Inc.

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Supplying aviation grade metals to the DoD and Aerospace industry.
Aerospace, Defense, Marine, Nuclear and Industrial Metals.
Exotic Metals & Hard to Find Metals.