Inconel 718 Bolts
GH4169 · UNS N07718 · W.-Nr. 2.4668
Max temp
700°C
Tensile
1275 MPa
Sizes
M6-M100
Cert
EN 10204 3.1 / 3.2
Inconel 718 (UNS N07718, GH4169, 2.4668) is a precipitation-hardened nickel-chromium bolting grade rated to 700°C and supplied to ASTM B637 and AMS 5662 at 1275 MPa tensile and 1030 MPa yield in the aged condition. Strengthening comes from gamma double-prime (γ″) Ni₃Nb precipitates, which gives inconel 718 bolts and inconel 718 fasteners the highest room-temperature strength of any common superalloy fastener together with good creep-rupture behaviour to 700°C.
Specifications
Composition in wt% per ASTM B637. Balance and residuals verified by 100% PMI on every lot.
Inconel 718 questions we get most
Continuous service is limited to about 700°C (1292°F). Above 650°C the γ″ strengthening phase begins to over-age and transform to the stable delta phase, so long-term creep strength drops. For sustained service above 700°C we recommend Nimonic 80A (815°C) instead.
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