Incoloy 800H Custom fasteners
ASTM B408
Incoloy 800H custom fasteners use controlled-carbon, coarse-grain performance for creep duty at drawing-defined bearing, locating or threaded interfaces. The manufacturing route starts with the functional datums and required final condition.
- 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
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
Head & drive
Choose the drive around the installed tool path: external flats need space around the head, while a socket recess needs axial access. Flange diameter determines the bearing footprint on the equipment face.
Shank & interfaces
Use shoulders and steps to locate tooling, pivots or covers rather than relying on thread clearance for positioning. Diameter tolerances and transition radii must match the mating bore and seat.
Thread & end form
Use unequal ends for housings and nuts with different engagement depths. Cross-holes, special tips and thread reliefs can provide pin retention, adjustment or clearance at a specific interface.
- Geometry
- Stepped shanks · Special heads · Ends
- Thread systems
- Metric · UNC · UNF · 8UN · UNJ
- Inputs
- Drawing · CAD · Parts list
- Final condition
- Solution annealed
- Inspection
- Drawing dimensions · Critical fits · Thread gauging
Manufacturing route
CNC machining suits samples and small lots. Cold heading or hot forging is selected for volume production according to alloy formability, head section and size.
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
Head geometry, bearing face, shank and thread fit are checked after the final machining and thermal operations.
Where 800H fits — and what matters
Furnaces & Heat Treatment
Heat-treatment fixturesIncoloy 800H drawing-based special alloy fasteners provide drawing-defined pins, stepped retainers or shoulder connections for heat-treatment fixtures. The loaded shoulder, locating fit and service-removal features establish the manufactured geometry. Hot dwell, thermal expansion and repeated furnace cycles set the working load.
Power & Turbines
Boiler-duct supports and hot auxiliary bracketsIncoloy 800H drawing-based special alloy fasteners provide drawing-defined pins, stepped retainers or shoulder connections for boiler-duct supports and hot auxiliary brackets. The loaded shoulder, locating fit and service-removal features establish the manufactured geometry. Hot dwell and start-stop expansion act on the supported or moving component.
Chemical Processing
Reformer tube-support and heater fixturesIncoloy 800H drawing-based special alloy fasteners provide drawing-defined pins, stepped retainers or shoulder connections for reformer tube-support and heater fixtures. The loaded shoulder, locating fit and service-removal features establish the manufactured geometry. These parts work in the heated equipment zone, where sustained loading and thermal expansion govern their section and clearance.
Same custom fastener. 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
- Drawing dimensions · Critical fits · Thread gauging
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your 800H custom fastener enquiry
Questions about 800H drawing-based special alloy fasteners
Which features control acceptance on a custom part?
The datum system and functional interfaces determine inspection: a locating shoulder, seal seat or short thread can be more important than the largest overall dimension. Keep these features identified on the revision supplied for manufacture.