An extremely strong precipitation hardened stainless steelFlange A 3x3

17-4 PH flanges are made from a precipitation hardened stainless steel most known for its exceptional strength and its ability to maintain its mechanical properties to 600°F. Compared to 316 stainless steel, 17-4 PH flanges yield strength is up over 4 times greater. When compared to Duplex 2205 flanges, the yield strength of 17-4 PH can be up to 2-½ times greater.

17-4 flanges are available in 8 different aged (precipitation hardened) conditions offering a variety of mechanical properties (see below). 

Resources: 17-4PH Torque SpecsFlange Dimensions, Flange Bolting Chart

Flange Types Available: Blind FlangesLap Joint FlangesSlip On FlangesSocket Weld FlangesThreaded FlangesWeld Neck Flanges


17-4PH Chemistry & Specifications

17-4PH Specifications: UNS S17400, Werkstoff 1.4542, AISI 630, ASTM A564-630, AMS 5604 Sheet, Strip and Plate, ASTM A 693 Plate

ASTM A564 GR 630
This specification covers bars and shapes (such as fasteners) of age hardened stainless steels such as 17-4PH. It includes hot-finished or cold-finished fasteners that are produced by hot rolling, extruding, or forging. Grade 630 shall be furnished in the solution-annealed or or age-hardened condition.

17 4 PH Chemistry


Common 17-4 Flanges:  Aged Conditions vs Tensile Strength

Tensiled Data vs Aged Condition Updated 3 2018

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