Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
Incoloy 800H Sheet
Incoloy 800H sheet (UNS N08810, Werkstoff 1.4876) is supplied to ASTM B409 / ASME SB-409 in thickness 0.4 mm to 4.75 mm with widths to 1500 mm in cold-rolled and bright-annealed (CRBA) or 2B finish from qualified Special Metals, VDM, Outokumpu and ATI mill sources. Sheet is the canonical thin-gauge form for fabricated furnace components (radiation shields, baffles, hood liners), thin-wall heat-exchanger fin material, expansion bellows for high-temperature compensators, exhaust-system thermal-management hardware, sulphur-recovery-unit (Claus) reactor internals and lab / process-instrumentation enclosures. The cold-roll and bright-anneal cycle holds the as-supplied surface to a Ra of 0.2 to 0.4 micron with consistent finish suitable for further fabrication by stamping, deep-drawing, spinning or laser-welding. Sheet is solution-annealed at 2050 deg F (1121 deg C) and quench-cooled to lock in ASTM grain size 5 or coarser. Each coil or sheared sheet carries an EN 10204 type 3.1 mill certificate by default with heat-number chemistry per B409 ranges, anneal cycle, mechanical results per ASTM A370, grain-size verification per ASTM E112 and dimensional report.
Sheet Dimensions per ASTM B409
| Property | Range |
|---|---|
| Thickness range | 0.4 mm to 4.75 mm |
| Width range | up to 1500 mm |
| Length | Coil or sheared (1.5, 2.0, 2.5, 3.0 m standard cuts) |
| Thickness tolerance | per ASTM A480 / B409 (typically +/- 5 percent at 1 mm thick) |
| Surface finish | 2B (cold-rolled, anneal, pickle, light skin-pass) standard; BA (bright-anneal) on call-out |
| Edge condition | Mill edge (default), slit edge per PO |
Sheet Manufacturing Route
- Hot-rolled coil source: Hot-rolled coil per ASTM B409, mill 3.1 cert verified.
- Pickle + cold-roll: HRAP coil pickled, then cold-rolled in multiple passes with intermediate anneal to reach final gauge.
- Bright anneal: Continuous bright-anneal line in hydrogen or dissociated ammonia at 2050 deg F locks in grain size 5 or coarser without surface oxidation.
- Skin-pass: Light cold-rolling pass to flatten and produce 2B finish.
- Slit / shear: Slit to ordered width, shear to ordered length.
- Inspection: Eddy-current on coil per ASTM B409 / A480; visual + dimensional per sheared piece.
- Mark + interleave: Heat number, grade, dimensions stencilled on each piece; interleaving paper between sheared pieces to protect 2B finish.
Sizes Stocked and Lead Times
| Thickness band | Width | Stock status | Lead time |
|---|---|---|---|
| 0.5 to 1.0 mm | 1000 / 1250 mm | Held in stock | 2 to 3 weeks |
| 1.0 to 2.0 mm | 1000 / 1250 / 1500 mm | Held in stock | 3 to 4 weeks |
| 2.0 to 3.0 mm | 1000 / 1250 / 1500 mm | Held in stock | 3 to 4 weeks |
| 3.0 to 4.75 mm | 1500 mm | Indent | 10 to 14 weeks |
Sheet-Specific Inspection and Marking
- Eddy-current per ASTM A480 on coil for surface and near-surface defects.
- Tensile + yield + elongation per ASTM A370 on transverse coupon per heat / coil.
- Grain size per ASTM E112 on coupon per heat / coil. Acceptance: grain size 5 or coarser.
- Surface finish: profilometer check on 2B finish (Ra 0.4 micron typical), BA finish (Ra 0.2 micron typical).
- Dimensional: thickness, width, length, flatness per ASTM A480.
- Marking: per ASTM B409 paragraph 13 - grade, dimensions, heat number, mill mark, paint stencil on each sheet, interleave paper between sheets to protect 2B finish.
Typical Sheet Service Conditions
| End-use | Service temperature | Companion application |
|---|---|---|
| Furnace radiation shield / hood liner | up to 982 deg C | Oxidation resistance |
| Expansion bellows / compensator | up to 815 deg C | ASME VIII vessels |
| Heat-exchanger fin material | up to 540 deg C | Heat exchanger tubes |
| Sulphur-recovery (Claus) reactor internals | up to 650 deg C | Carburization + sulfidation |
| Fabricated furnace baffle | up to 815 deg C | Radiant tubes |
Companion Forms
800H sheet feeds into B514 welded pipe for very small bore tubular products, into fabricated furnace components via stamping and deep-drawing, and into expansion bellows by hydroforming. For heavier gauges (4.75 mm and above) see 800H plate. For weld procedures applicable to sheet-gauge stock, see weldability procedures.
Engineering Guidance for Sheet Specification
When specifying 800H sheet, the dominant decision factors are thickness gauge, surface finish, and downstream fabrication route. Thickness from 0.4 mm to 4.75 mm is supplied as cold-rolled sheet; for deep-drawing and stamping the 2B finish with skin-pass is preferred because the slightly flattened surface grain improves drawability and reduces tool wear. For hydroformed expansion bellows, BA (bright-anneal) finish with tight thickness tolerance and high transverse ductility is supplied to bellows-grade specification. For laser-cut decorative or technical parts, BA finish with nitrogen-assist laser cutting preserves cut-edge integrity and avoids the chromium-rich passive film disruption that oxygen-assist cutting produces. For furnace radiation shields and hood liners in service above 800 deg C, the as-supplied 2B finish is acceptable because the in-service oxidation rapidly builds a protective chromium-oxide scale that masks any cosmetic surface variation. The TorqBolt sales desk can route a sheet-specification query through the fabrication-shop team for application-specific surface and tolerance recommendation, and confirm bellows-grade or aerospace-grade AMS 5871 add-on requirements.
Sheet FAQ
Q. What is the thinnest gauge available in 800H sheet?
The standard cold-roll mill envelope reaches 0.4 mm. Thinner foil (0.1 to 0.4 mm) is available from selected mills on indent only with extended lead time.
Q. What surface finish should I specify for fabrication by deep-drawing?
2B finish (cold-rolled, anneal, pickle, skin-pass) is the standard for deep-drawing and stamping. The skin-pass produces a slightly flattened grain at the surface that improves drawability. BA (bright-anneal) finish is preferred for cosmetic / visible applications but is slightly harder to deep-draw without lubrication.
Q. Do you supply 800H sheet for hydroformed expansion bellows?
Yes. Bellows-grade sheet at 0.5 to 1.5 mm thickness, BA finish, with tight thickness tolerance and high transverse ductility is supplied for hydroformed bellows used in expansion compensators at petrochemical and refinery furnaces. The bellows-grade specification adds a tighter tensile elongation requirement (typically 40 percent minimum in 4D) on the EN 10204 certificate.
Q. Can you laser-cut 800H sheet to shape?
Yes. Laser cutting with nitrogen assist gas (not oxygen) preserves the cut-edge condition and avoids oxidation of the chromium-rich passive film. After laser cut, the edge should be deburred and PT-inspected if the edge will be welded.
Q. Do you supply 800H sheet to AMS 5871 (the SAE aerospace adoption of the 800H spec)?
Yes on call-out. AMS 5871 is the SAE Aerospace Material Specification for nickel-iron-chromium alloy 800H sheet, strip and plate; it adds tighter aerospace traceability (heat-batch testing, retention of representative samples) and a slightly tighter mechanical-property envelope than ASTM B409. AMS 5871 certification is available on call-out for aerospace exhaust-system and thermal-management hardware.
Request a Quote on Incoloy 800H Sheet
Send the project drawing or cut list, thickness, width, length, surface finish (2B / BA / mill-finish), edge condition, certification class (3.1 or 3.2) and any laser-cut / AMS 5871 / bellows-grade add-ons to our sales desk.
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