Tag: Inconel 718 per ASTM B637

Inconel 718 per AMS 5962

Q: What is the difference between “standard” Inconel 718 and Inconel 718 per AMS 5962

A:  While nothing about Inconel 718 is standard, however the most popular variety of Inconel 718 bolts is per ASTM B637.  For this version of s, the bolts are age hardened to have a minimum tensile strength of 185 KSI and minimum yield of 150 KSI.  Inconel fasteners per AMS 5962 are not only age hardened but they are also cold worked or work strengthened to produce an extremely high minimum tensile strength of 220 KSI.

Inconel 718 Bolts Per ASTM B637

Q: What does it mean for Inconel bolts to be produced per ASTM B637.
A: The specification ASTM B637 is a raw material specification for both hot- and cold-worked precipitation-hardened nickel alloy rod, bar, forgings, and forging stock for high-temperature service. Inconel 718 bolts are one of several age hardened nickel alloys that use this raw material specification. Inconel bolts per ASTM B637 must meet specific mechanical properties including strength, hardness, and stress-rupture requirements.