Nimonic 80A Bolts
GH4080A · UNS N07080 · W.-Nr. 2.4952
Max temp
815°C
Tensile
1100 MPa
Sizes
M6-M100
Cert
EN 10204 3.1 / 3.2
Nimonic 80A (UNS N07080, GH4080A, 2.4952) is the highest-temperature grade in our standard fastener range, rated to 815°C and supplied to BS HR 401 and AMS 5828 at 1100 MPa tensile and 620 MPa yield in the solution-plus-aged condition. Strengthening comes from a fine, thermally stable gamma-prime Ni₃(Al,Ti) dispersion that does not over-age the way Inconel 718's γ″ does, so nimonic 80a bolts hold useful load capacity to 815°C.
Specifications
Composition in wt% per BS HR 401. Balance and residuals verified by 100% PMI on every lot.
Nimonic 80A questions we get most
Inconel 718 relies on the metastable γ″ phase, which coarsens and transforms to delta above roughly 650°C. Nimonic 80A fasteners use gamma-prime Ni₃(Al,Ti), which stays coherent and finely dispersed to 815°C, so stress-rupture life is far longer at temperature.
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