Incoloy 800H Fully threaded stud & nut sets
ASME B18.31.2ASTM B408
A Incoloy 800H stud-and-nut set brings controlled-carbon, coarse-grain performance for creep duty to the complete threaded connection. The stud and two nuts retain separate material conditions, thread checks and lot identities within one BOM.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution 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
Solution annealedThe specified solution treatment develops the controlled grain structure needed for sustained high-temperature creep duty.
What we can make in Alloy 800H
Stud
Finished stud length covers the flange stack, gasket and both nut engagements. Full-length thread permits nut positioning from either end for cover removal and flange assembly.
Nuts
Match nut thread class and proof-load requirements to the stud. Regular and heavy-hex patterns need different socket clearances and bearing footprints around the flange holes.
- Grade pairing
- Stud + two nuts
- Grade pairing
- Metric · UNC · UNF · 8UN · UNJ
- Grade pairing
- Component-by-component grades
- Grade pairing
- Heat and batch identification
- Final condition
- Solution annealed
- Inspection
- Component count · Mating thread fit · Individual dimensions
Manufacturing route
Studs, nuts and washers are manufactured and inspected as separate components before the specified quantities are packed as a set.
Heat treatment & final condition
The final solution-treated condition and grain-size requirement are recorded for the ordered H or HT grade. Final dimensions are inspected after the last thermal operation.
Finished geometry
Thread engagement, nut pattern and component grades are checked together. Each component retains its heat or batch identity in the set documentation.
Where 800H fits — and what matters
Furnaces & Heat Treatment
Retort and furnace-access coversIncoloy 800H fully threaded stud & nut sets supply the stud and two mating nuts for retort and furnace-access covers as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. Hot dwell, thermal expansion and repeated furnace cycles set the working load.
Power & Turbines
Hot-gas access covers and inspection closuresIncoloy 800H fully threaded stud & nut sets supply the stud and two mating nuts for hot-gas access covers and inspection closures as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. Hot dwell and start-stop expansion act on the supported or moving component.
Chemical Processing
Reformer access covers and hot-gas inspection closuresIncoloy 800H fully threaded stud & nut sets supply the stud and two mating nuts for reformer access covers and hot-gas inspection closures as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. These parts work in the heated equipment zone, where sustained loading and thermal expansion govern their section and clearance.
Same stud & nut set. Different material priorities.
Incoloy 800H material dataIncoloy 800
UNS N08800- Carbon
- ≤0.10%
- What changes
- General heat and oxidation resistance; no grain-size requirement in the family comparison.
Incoloy 800H
UNS N08810 · Current grade- Carbon
- 0.05–0.10%
- What changes
- Controlled carbon and coarse-grain condition for creep and stress-rupture duty.
Incoloy 800HT
UNS N08811- Carbon
- 0.06–0.10%
- What changes
- Tighter carbon and Al + Ti control (0.85–1.20%), with solution treatment and coarse grain for creep duty.
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 N08810 · heat number · ordered condition
- Final-part acceptance
- UNS grade, carbon and alloy chemistry, solution-treatment record and ordered grain-size evidence.
- Dimensional record
- Component count · Mating thread fit · Individual dimensions
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Matching Kit
Flange Stud Bolt Kits
Build your 800H stud & nut set enquiry
Questions about 800H fully threaded stud & nut sets
What makes a set traceable rather than simply bagged together?
The stud and each nut lot retain their material and production identities. Component counts, mating thread checks and final conditions are recorded against the set’s BOM.