Incoloy 800 Stud Bolts
ASME B18.31.2ASTM B408
Incoloy 800 stud bolts pair an iron-nickel-chromium alloy with double-ended closure for retort, exchanger, and radiant-tube joints that need controlled tensioning and repeated disassembly. The alloy resists oxidation and carburization across both stud ends.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Annealed
EN 10204 3.1 MTC + heat-number traceability
Which standard is on your order?
Raw Material Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
AnnealedAnnealing reduces work hardening and restores ductility for the specified supplied condition.
What we can make in Alloy 800
Fully threaded
Two nuts clamp the flange or cover; usable thread length spans the assembled grip.
Double-end
A plain centre spans the grip, with a threaded portion at each end for the nuts.
Tap-end
One end engages a tapped casing; the exposed end accepts the cover nut.
- Threads
- Metric · UNC · UNF · 8UN · UNJ
- Forms
- Continuous thread · Double-end · Tap-end
- Final condition
- Annealed
- Inspection
- Thread size and fit; overall and effective thread length; end geometry; lot identification.
Manufacturing route
CNC machining suits samples and special end forms. Repeat lots use cut-to-length stock with rolling or cutting selected for the ordered thread and material condition.
Heat treatment & final condition
The ordered annealed or solution-treated state is retained in the lot record; forming and machining do not replace the specified thermal condition.
Finished geometry
End lengths, runout and effective thread engagement are checked separately from overall length; tap ends are gauged to their own fit requirement.
Where 800 fits — and what matters
Retort & muffle covers
Incoloy 800 Stud BoltsIncoloy 800 studs give retort accessory covers fixed mounting points in a heat-resistant alloy. The nuts can be removed while the studs remain installed, simplifying repeat access. Resistance to oxidation and carburization is useful at exposed thread ends and shanks near the furnace atmosphere.
Connection requirements
- Cover joint thickness, gasket type, and required preload
- Stud diameter, overall length, and nut engagement at each end
- Oxidising/carburizing duty, cycling history, and heat-number certification
Heat-exchanger & reactor covers
Incoloy 800 Stud Bolts800 studs can secure hot equipment accessories where the required load fits their specified condition. On a tapped mounting arrangement, the studs stay in the equipment while the cover and nuts are removed. This suits repeated access to moderately loaded, heat-exposed attachments.
Connection requirements
- Cover joint thickness, gasket type, and required preload
- Stud diameter, overall length, and nut engagement at each end
- Oxidising/carburizing duty, cycling history, and heat-number certification
Radiant tubes & circulation fans
Incoloy 800 Stud BoltsIncoloy 800 studs can anchor radiant-tube support brackets and furnace fan accessories in hot atmospheres. The accessible threaded end accepts nuts for adjustment and removal. Where the support carries a sustained load at high temperature, the creep-strength difference between 800 and 800H becomes a practical selection issue.
Connection requirements
- Support joint thickness, gasket type, and required preload
- Stud diameter, overall length, and nut engagement at each end
- Oxidising/carburizing duty, cycling history, and heat-number certification
Same stud. Different material priorities.
Incoloy 800 material dataIncoloy 800H Stud Bolts
A hot cover can keep its studs in tension for months between shutdowns. Incoloy 800H studs address that sustained load with the controlled-carbon, coarse-grain condition that improves creep and rupture strength over Incoloy 800. They belong in a stud-and-nut assembly designed for the operating temperature and long-duration load, with accessible nuts for cover removal.
Inconel 601 Stud Bolts
Inconel 601 studs provide fixed, oxidation-resistant mounting points for furnace covers, lining retainers and hot-side supports. Nuts can be removed while the stud stays installed. Projection and stand-off length help place the accessible nut away from the hot attachment point.
A-286 Stud Bolts
Exhaust manifolds can be removed from the accessible nut side while body-mounted A-286 studs stay installed. The alloy supplies elevated-temperature strength to carry the flange load. Fixed studs also help locate the gasket and manifold during reassembly, making this a practical form for repeatedly serviced hot joints.
From drawing to documented delivery
- 01Drawing & BOMForm, dimensions and quantity
- 02Material & formingGrade, heat and manufacturing route
- 03Final inspectionGeometry, threads and ordered tests
- 04Documents & dispatchLot records and identified packing
Order documents
- Material identity
- UNS N08800 · heat number · ordered condition
- Final-part acceptance
- Grade chemistry, supplied condition and ordered mechanical requirements.
- Dimensional record
- Thread size and fit; overall and effective thread length; end geometry; lot identification.
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Matching Kit
Flange Stud Bolt Kits
Build your 800 stud enquiry
Questions about 800 stud bolts & threaded rods
Does changing the stud alloy also change the nut selection?
The nut needs compatible internal threads, sufficient engaged height and a specified material condition. Select lubricant or surface treatment with the stud–nut pair, because assembly friction affects the preload obtained from tightening.