An extremely strong precipitation hardened stainless steel17-4 PH Bolts

17-4 PH bolts 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 bolts yield strength is up over 4 times greater. When compared to Duplex 2205 bolts, the yield strength of 17-4 PH can be up to 2-½ times greater.

17-4 bolts are available in 8 different aged (precipitation hardened) conditions offering a variety of mechanical properties (see below). Extreme Bolt & Fastener also offers bolts per ASTM F593 Grade 630. This fastener specification ensures the yield and tensile strengths for sensitive applications.

Resources: 17-4PH Torque Specs

17-4 PH Bolt Types: Hex BoltsShoulder Bolts


17-4PH Chemistry & Specifications

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

17 4 PH Chemistry


ASTM F593, Grade 630

This specification covers seven groups of stainless steel alloys, with ASTM F593, Grade 630 applying 17-4PH. ASTM F593 Grade 630 covers the requirements for 17-4PH stainless steel bolts, hex cap screws, and studs sized 0.25 to 1.50 inches, inclusive, in nominal diameter. It is intended for common use and for service applications requiring general corrosion resistance.

ASTM F593 Grade 660 chart B


Common 17-4 Fastener:  Aged Conditions vs Tensile Strength

Tensiled Data vs Aged Condition Updated 6 2018

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